Quidway S5700 Series Ethernet Switches V100R006C01. Configuration Guide - VPN. Issue 01 Date HUAWEI TECHNOLOGIES CO., LTD.

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1 V100R006C01 Issue 01 Date HUAWEI TECHNOLOGIES CO., LTD.

2 2011. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied. Huawei Technologies Co., Ltd. Address: Website: Huawei Industrial Base Bantian, Longgang Shenzhen People's Republic of China i

3 About This Document About This Document Intended Audience This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the VPN feature supported by the S5700 device. This document describes how to configure the VPN feature. NOTE S5700 is controlled by the license. By default, the MPLS function is disabled on the S5700. To use the MPLS function of the S5700,buy the license from the Huawei local office. Only S5700HI supports the MPLS VPN function. This document is intended for: Data configuration engineers Commissioning engineers Network monitoring engineers System maintenance engineers Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol Description DANGER WARNING CAUTION Indicates a hazard with a high level of risk, which if not avoided, will result in death or serious injury. Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury. Indicates a potentially hazardous situation, which if not avoided, could result in equipment damage, data loss, performance degradation, or unexpected results. TIP Indicates a tip that may help you solve a problem or save time. ii

4 About This Document Symbol NOTE Description Provides additional information to emphasize or supplement important points of the main text. Command Conventions The command conventions that may be found in this document are defined as follows. Convention Boldface Italic Description The keywords of a command line are in boldface. Command arguments are in italics. [ ] Items (keywords or arguments) in brackets [ ] are optional. { x y... } Optional items are grouped in braces and separated by vertical bars. One item is selected. [ x y... ] Optional items are grouped in brackets and separated by vertical bars. One item is selected or no item is selected. { x y... } * Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected. [ x y... ] * Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected. &<1-n> The parameter before the & sign can be repeated 1 to n times. A line starting with the sign is comments. Change History Updates between document issues are cumulative. Therefore, the latest document issue contains all updates made in previous issues. Changes in Initial commercial release. iii

5 Contents Contents About This Document...ii 1 VLL Configuration Introduction to VLL VLL Features Supported by the S Configuring CCC VLL Establishing the Configuration Task Enabling the MPLS L2VPN Creating a Local CCC Connection Creating a Remote CCC Connection Checking the Configuration Configuring the SVC VLL Establishing the Configuration Task Enabling MPLS L2VPN Creating an SVC VLL Connection Checking the Configuration Configuring Martini VLL Establishing the Configuration Task Enabling MPLS L2VPN Creating a Martini VLL Connection Checking the Configuration Configuring VLL FRR Establishing the Configuration Task Configuring Master and Backup PWs (Optional) Configuring Fast Fault Notification - Physical Layer Fault Notification (Optional) Configuring BFD for PW (Optional) Configuring the Revertive Switchover Checking the Configuration Maintaining VLL Enabling Traffic Statistics on the VLL Viewing Traffic Statistics on the VLL Resetting Traffic Statistics on the VLL Monitoring the Running Status of VLL Debugging VLL...25 iv

6 Contents Checking Connectivity of the VLL Network Configuration Examples Example for Configuring a Local CCC Connection Example for Configuring a Remote CCC Connection Example for Configuring an SVC VLL Example for Configuring a Martini VLL Introduction to PWE PWE3 Features Supported by the S Configuring the Attributes of a PW Template Establishing the Configuration Task Creating a PW Template Setting the Attributes for a PW Template Checking the Configuration Configuring a Static PW Establishing the Configuration Task Enabling MPLS L2VPN Creating a Static PW Checking the Configuration Configuring a Dynamic PW Establishing the Configuration Task Enabling MPLS L2VPN Creating a Dynamic PW Checking the Configuration Configuring PW Switching Establishing the Configuration Task Configuring PW Switching Checking the Configuration Configuring a Backup PW Establishing the Configuration Task Configuring a Backup PW Checking the Configuration Configuring Static BFD for PW Establishing the Configuration Task Enabling BFD Globally Enabling the Sending of BFD for PW Packets to the Protocol Stack Configuring BFD for PW Checking the Configuration Configuring Dynamic BFD for PW Establishing the Configuration Task Enabling BFD Globally Enabling the Sending of BFD for PW Packets to the Protocol Stack...82 v

7 Contents Configuring the Attributes of a PW Template (Optional) Adjusting BFD Parameters Configuring PWs Triggering Dynamic BFD for PW Checking the Configuration Configuring PWE3 FRR Establishing the Configuration Task Configuring Primary and Backup PWs (Optional) Configuring BFD for PW (Optional) Configuring the Revertive Switchover Checking the Configuration Maintaining PWE Verifying the Connectivity of a PW Locating a Fault of a PW Debugging a PWE Configuration Examples Example for Configuring a Dynamic SH-PW Example for Configuring a Static MH-PW Example for Configuring a Dynamic MH-PW Example for Configuring a Mixed MH-PW Example for Configuring Static BFD for PW Example for Configuring Dynamic BFD for SH-PW Example for Configuring Dynamic BFD for MH-PW vi

8 1 VLL Configuration 1 VLL Configuration About This Chapter This chapter describes how to configure a VLL to transparently transmit data on the MPLS network. 1.1 Introduction to VLL A Virtual Leased Line (VLL) emulates the traditional leased line on the IP network, and provides asymmetric and low-cost digital data network (DDN) services. For users on both ends of a VLL, the VLL is similar to the traditional leased line. As a point-to-point virtual private line technology, VLL supports nearly all link layer protocols. 1.2 VLL Features Supported by the S5700 VLL can be implemented in three modes, namely, Circuit Cross Connect (CCC), Switched Virtual Circuit (SVC), and Martini. 1.3 Configuring CCC VLL This section describes how to configure a CCC VLL. The CCC VLL transmits data by adding a one-layer label to the data. Being configured by the administrator, the CCC VLL is applicable to an MPLS network of the small size and simple topology. The CCC VLL needs no signaling negotiation and control packet exchange, and thus consumes fewer resources and is easy to understand. Nevertheless, the CCC VLL has poor scalability and is inconvenient to maintain. 1.4 Configuring the SVC VLL This section describes how to configure an SVC VLL. After the SVC VLL is configured, L2VPN information can be transmitted without the usage of any signaling protocol. 1.5 Configuring Martini VLL This section describes how to configure a Martini VLL. To configure the Martini VLL, you need to establish the point-to-point link to implement L2VPN, and use the Label Distribution Protocol (LDP) to transmit Layer 2 information and VC labels. 1.6 Configuring VLL FRR This section describes how to configure VLL Fast Re-route (FRR). After VLL FRR is configured, the VLL traffic is switched to the secondary path if the primary path fails. If the primary path recovers, the VLL traffic can be switched back to it according to the revertive switching policy. 1.7 Maintaining VLL 1

9 1 VLL Configuration This section describes how to maintain a VLL. Detailed operations include monitoring the L2VPN running status. 1.8 Configuration Examples Each configuration example consists of such information as the networking requirements, configuration notes, and configuration roadmap. 2

10 1 VLL Configuration 1.1 Introduction to VLL A Virtual Leased Line (VLL) emulates the traditional leased line on the IP network, and provides asymmetric and low-cost digital data network (DDN) services. For users on both ends of a VLL, the VLL is similar to the traditional leased line. As a point-to-point virtual private line technology, VLL supports nearly all link layer protocols. Traditional VPNs are based on Asynchronous Transfer Mode (ATM) or Frame Relay (FR), where different VPNs can share the network structure of carriers. Traditional VPNs have the following disadvantages: Dependence on special media (such as ATM or FR): The carriers must establish ATM networks or FR networks for ATM-based or FR-based VPNs across the country. This is a waste of network construction. Complicated VPN structure: when a site is added to an existing VPN, it is necessary to modify the configuration of all the edge nodes that access the VPN site. To avoid the preceding disadvantages, new solutions are introduced. Virtual Leased Line (VLL) based on Multiprotocol Label Switching (MPLS) L2VPN is one of the solutions. NOTE VLL in this chapter refers to VLL based on MPLS L2VPN, unless otherwise specified. The VLL provides Layer 2 VPN services on the MPLS network. It allows the establishment of L2VPNs on different media including VLAN, Ethernet. At the same time, the MPLS network provides traditional IP services, MPLS L3VPN, traffic engineering and QoS. The VLL transfers Layer 2 data of the user transparently on the MPLS network. An MPLS network is a Layer 2 switching network on which used to establish Layer 2 connections are established between nodes. Compared with BGP/MPLS VPN, VLL has the following advantages: High scalability: The VLL establishes layer 2 link relationships. It does not import and manage the routing information of the user. It significantly reduces the load of the PE device and SP network. This enables the carrier to support more VPNs and more users. Reliability and guaranteed security of private routing information: The VLL cannot obtain and process VPN routing information because it is not imported. Support for network layer protocols such as IP, IPX, and SNA. Figure 1-1 shows the model of VLL. Figure 1-1 VLL model AC VC Tunnel AC CE PE MPLS Network PE CE 3

11 1 VLL Configuration Attachment Circuit (AC) : AC is an independent link or circuit that connects CE and PE. The AC interface may be a physical interface or a logical interface. The AC attributes include the encapsulation type, MTU and interface parameters of specified link type. Virtual Circuit (VC) : It refers to a kind of logical connection between two PEs. Tunnel (Network Tunnel) : It transmits the user data transparently. Through the label stack, VLL can realize the transparent transmission of user datagram in an MPLS network. Outer label: The label, which is also called tunnel label, is used in transferring packets from one PE to another. Inner label: The label, which is also called VC label in VLL, is used to identify different links between VPNs. The PE on the receiver side transfers packets to the corresponding CE according to the VC label. Figure 1-2 shows the packet label change in the forwarding process. Figure 1-2 VLL label processing CE 1 PE 1 P PE 2 CE 2 L2PDU T V L2PDU T' V L2PDU L2PDU Figure 1-2 shows the Layer 2 Protocol Data Unit (PDU) that is the link layer packet. Here, T represents Tunnel label; V represents VC label; T' indicates that the outer label is substituted in the forwarding process. 1.2 VLL Features Supported by the S5700 CCC VLL VLL can be implemented in three modes, namely, Circuit Cross Connect (CCC), Switched Virtual Circuit (SVC), and Martini. The Circuit Cross Connect (CCC) implements the VLL by static configuration. Unlike common VLL, the CCC adopts one label to transfer user data, so it uses the LSP exclusively. These LSPs can only be used to transfer the data of this CCC link, and cannot be used in other VLL links, BGP/MPLS VPN, or used to transfer common IP packets. The two types of CCC connection are as follows: Local connection: refers to the connection between two local CEs. The two CEs are connected to the same PE. Similar to a layer 2 switch, PE can directly transport packets without configuring static LSP. Remote connection: refers to the connection between local CE and remote CE. The two CEs are on different PEs. In this case, static LSP configuration is needed to transfer packets 4

12 1 VLL Configuration from one PE to another PE. Configuration command is run on the PE to map the static LSP to the CCC connection. SVC VLL The SVC implements VLL through static configuration. The SVC transfers L2VPN information without using the signaling protocols. The VC label needs to be configured manually. NOTE The incoming label of the CCC and receive label of the SVC all range from 16 to They are in the same label space with those reserved for static LSPs. The outgoing label of CCC and the transmit label of SVC, however, ranges from 0 to because it is for intercommunication. Martini VLL The Martini mode implements the L2VPN by setting up a point-to-point link. It takes LDP as the signaling protocol to transfer Layer 2 information and VC labels. The Martini VLL adopts VC-type plus VC-ID to identify a VC between two CEs. VC-type: indicates the type of the VC, such as Ethernet and VLAN. VC-ID: A VC ID and a VC type uniquely identify a VC on a PE. The PEs connecting two CEs exchange VC labels through LDP, and bind the corresponding CE by VC-ID. A VC is set up when all the following conditions are satisfied: The tunnel between the two PEs is successfully created. The label exchange and the binding with CE are completed. The state of the two interfaces of AC is Up. In order to exchange VC labels between PEs, the Martini extends LDP by adding the FEC type in the VC FEC. For remote connections, the two PEs that exchange the VC label cannot be directly connected; therefore, the remote LDP session must be set up to convey the VC FEC and the VC label. Access Mode When configuring a VLL, you need to configure the interface (that is, AC interface) connecting the PE to the CE. On the S5700, a VLL supports the following interfaces to be configured as AC interfaces: XGE interfaces GE interfaces Eth-Trunk interfaces VLANIF interfaces When XGE, GE, or Eth-Trunk interfaces are used as AC interfaces, the outer tags carried in the packets sent from the AC to the PW are C tags (inserted by customer devices, which are meaningless to the SP) by default. When VLANIF interfaces are used as AC interfaces, the outer tags carried in the packets sent from the AC to the PW are S tags (inserted by SP devices, which are usually used to differentiate user traffic) by default. 5

13 1 VLL Configuration NOTE Only VLANIF interfaces can function as the AC interfaces for VLL connections in CCC mode. By default, physical interfaces on the S5700 are Layer 2 interfaces. When using XGE, GE, or Eth- Trunk interfaces on the S5700 as AC interfaces, you need to run the undo portswitch command to switch Layer 2 interfaces to Layer 3 interfaces. Processing Tags Carried in Packets by the VLL The system process packets according to the AC interface type and PW encapsulation type. The PW encapsulation types can be classified into Ethernet encapsulation and VLAN encapsulation. When VLANIF interfaces function as AC interfaces, the VLAN encapsulation is adopted by default. When GE, XGE, or Eth-Trunk interfaces function as AC interfaces, the Ethernet encapsulation is adopted by default. Table 1-1 Processing VLAN tags carried in packets from the AC by the PW PW Encapsulation Type VLAN encapsulation Ethernet encapsulation Processing of the VLAN Tag Do not process the S tag carried in a packet. If an S tag is carried in a packet, delete the S tag from the packet. If no S tag is carried in a packet, do not process the packet. Table 1-2 Processing VLAN tags carried in packets from the PW by the AC AC Interface Type GE, XGE or Eth-Trunk interface VLANIF interface Processing of the VLAN Tag Do not process the packet. If an S tag is carried in a packet, rewrite the S tag. If no S tag is carried in a packet, add an S tag in the packet. VLL FRR With the wide applications of VLLs, the requirement for the reliability of VLLs becomes increasingly high, especially for L2VPNs that carry real-time services such as VoIP and IPTV. Virtual Lease Line Fast Reroute (VLL FRR) is one of the solutions to increasing the reliability of L2VPNs. VLL FRR is mainly used in the following networking mode: Asymmetrically connected CEs 6

14 1 VLL Configuration One CE is connected to a PE through an AC and the other CE is dual-homed to PEs through two ACs, as shown in Figure 1-3. Figure 1-3 Asymmetrically connected CEs P1 PE2 PE1 VPN backbone AC2 CE1 AC1 AC3 CE2 Site1 P2 PE3 Site2 1.3 Configuring CCC VLL This section describes how to configure a CCC VLL. The CCC VLL transmits data by adding a one-layer label to the data. Being configured by the administrator, the CCC VLL is applicable to an MPLS network of the small size and simple topology. The CCC VLL needs no signaling negotiation and control packet exchange, and thus consumes fewer resources and is easy to understand. Nevertheless, the CCC VLL has poor scalability and is inconvenient to maintain Establishing the Configuration Task Applicable Environment CCC is applicable to the small-sized MPLS networks that has simple topology. CCC needs to be configured manually. CCC does not need signaling negotiation or packet interaction. The resource consumption is low and the configuration is simple. However, CCC is not easy to be maintained and the extensibility is poor. You need to configure interface connecting the PE to the CE (namely the AC interface) before configuring a CCC. NOTE On an S5700, only the VLANIF interface can be configured as the AC interface of CCC connection. Pre-configuration Tasks Before configuring the CCC VLL, complete the following task: Configuring the basic MPLS capability on the MPLS backbone network (PEs and P) 7

15 1 VLL Configuration Data Preparation To configure the CCC VLL, you need the following data. No. Data 1 Name of a CCC connection 2 Connection type: local connection or remote connection 3 Local CCC connection: the types and numbers of the incoming and outgoing interfaces 4 Remote CCC connection: the type and number of the incoming interface, the IP address of the next-hop or the type and number of the outgoing interface 5 Remote CCC connection: the in-label and out-label values of LSRs Choose Creating a Local CCC Connection or Creating a Remote CCC Connection according to the required connection type Enabling the MPLS L2VPN Context Procedure Before configuring a CCC VLL, you must enable MPLS L2VPN. Do as follows on the PEs of the two ends of the VC: Step 1 Run: system-view The system view is displayed. Step 2 Run: l2vpn The MPLS L2VPN is configured. ----End Creating a Local CCC Connection Context This part describes how to create a local CCC connection. To create the local CCC connection, you need to only configure the incoming and outgoing interfaces of the CCC connection on a local PE. The local CCC connection is bidirectional and thus only one such connection needs to be created. The local CCC connection is bidirectional, and thus only one connection is required. Do as follows on the PEs: 8

16 1 VLL Configuration Procedure Step 1 Run: system-view The system view is displayed. Step 2 Run: ccc ccc-connection-name interface interface-type1 interface-number1 [ raw tagged ] out-interface interface-type2 interface-number2 [ raw tagged ] A local CCC connection is created. The S5700 can create a local CCC connection only on the VLANIF interface. By default, the raw encapsulation type is adopted. ----End Follow-up Procedure After the configuration mentioned above on the PE, a local CCC connection is created Creating a Remote CCC Connection This part describes how to create a remote CCC connection. To create the remote CCC connection, you need to configure the incoming and outgoing interfaces and set the incoming label and outgoing label for the CCC connection on the local and remote PEs. In addition, you need to configure two bidirectional static LSPs on the P device. The remote CCC connection is unidirectional and thus two such connections need to be created. Procedure Configuring the PE Do as follows on the PEs of the two ends of the VC: 1. Run: 2. Run: system-view The system view is displayed. ccc ccc-connection-name interface interface-type1 interface-number1 [ raw tagged ] in-label in-label-value out-label out-label-value nexthop nexthop-address [ control-word no-control-word ] A remote CCC connection is configured. On the PE or P, the remote CCC connection can be configured only on the VLANIF interface. You must use nexthop to specify the IP address of the next hop. By default, the remote CCC connection adopts the raw encapsulation type. Configuring P Do as follows on the Ps that the VC passes through: 1. Run: system-view The system view is displayed. 9

17 1 VLL Configuration ----End 2. Run: Checking the Configuration static-lsp transit lsp-name incoming-interface interface-type interfacenumber in-label in-label nexthop nexthop-address out-label out-label The P device is configured as a transit LSR of the static LSP. It is not necessary to configure static LSPs on the PEs for the CCC connection. You should configure a bidirectional transit static LSP on all the P devices between the PEs. These LSPs are used to transfer the data of this CCC exclusively. Furthermore, MPLS L2VPN need not be enabled on the P devices. When you configure the outgoing interfaces of the CCC remote connection, the outgoing interfaces must be VLANIF interface You must use the nexthop to specify the IP address of the next hop. After a CCC VLL is configured, you can view information about the CCC connection and interfaces of the CCC connection. Prerequisite Procedure The configurations of the CCC VLL function are complete. Run the display vll ccc [ ccc-name type { local remote } ] command to check the CCC connection information. Run the display l2vpn ccc-interface vc-type ccc [ down up ] command to check the interface information of the CCC connection. ----End Example Run the display vll ccc command. You can find that the status of the CCC VC is Up. For example: Information about the local connection is as follows: <Quidway> display vll ccc total ccc vc : 1 local ccc vc : 1, 1 up remote ccc vc : 0, 0 up name: CE1-CE2, type: local, state, intf1: Vlanif10 (up), intf2: Vlanif20 (up) VC last up time : 2008/07/24 12:31:31 VC total up time: 0 days, 2 hours, 12 minutes, 51 seconds Information about the remote connection is as follows: <Quidway> display vll ccc total ccc vc : 1; local ccc vc : 0, 0 up remote ccc vc : 1, 1 up name: CE1-CE2, type: remote, state, intf: vlanif11 (up), in-label: 100, out-label: 200, nexthop: VC last up time : 2008/07/24 12:31:31 VC total up time: 0 days, 2 hours, 12 minutes, 51 seconds 10

18 1 VLL Configuration Run the display l2vpn ccc-interface vc-type ccc command. You can find that the VC type is CCC and the VC status is Up. For example: <Quidway> display l2vpn ccc-interface vc-type ccc Total ccc-interface of CCC : 1 up (1), down (0) Interface Encap Type State VC Type Vlanif11 ethernet up ccc 1.4 Configuring the SVC VLL This section describes how to configure an SVC VLL. After the SVC VLL is configured, L2VPN information can be transmitted without the usage of any signaling protocol Establishing the Configuration Task Before configuring an SVC VLL, familiarize yourself with the applicable environment, complete the pre-configuration tasks, and obtain the required data. This can help you complete the configuration task quickly and accurately. Applicable Environment The setup process of the SVC outer label (public network tunnel) is the same as that of the Martini. Inner label is manually specified, without the signaling transmission of the VC label, during the VC configuration. The SVC does not use signaling protocols to transfer L2VPN information. Packets are transported between the PEs through tunnels. The SVC only supports LDP LSP tunnel. Pre-configuration Tasks Data Preparation Before configuring SVC VLL, you need to complete the following tasks: Configuring the static route or IGP for the MPLS backbone network (PE and P) to implement IP connectivity Enabling the MPLS for PEs To configure the SVC VLL, you need the following data. No. Data 1 Type and number of the interface accessing CE 2 Destination LSR ID of SVC 3 In-label and out-label values of L2VPN connection 11

19 1 VLL Configuration Enabling MPLS L2VPN Context Procedure Before configuring an SVC VLL, you must enable MPLS L2VPN. Do as follows on the PEs of the two ends of the VC: Step 1 Run: system-view The system view is displayed. Step 2 Run: l2vpn The MPLS L2VPN is enabled. ----End Creating an SVC VLL Connection Context Procedure Do as follows on the PEs on the two ends of the VC. Step 1 Run: system-view The system view is displayed. Step 2 Run: interface interface-type interface-number The AC interface view is displayed. Step 3 (Optional) Run: undo portswitch The Layer 2 interface is configured as a Layer 3 interface. NOTE To use an XGE interface, a GE interface, or an Eth-Trunk interface of the S5700 as the AC interface of the PE, you need to perform step 3 to configure the Layer 2 interface as a Layer 3 interface. Step 4 Run: static-l2vc destination ip-address transmit-vpn-label transmit-label-value receive-vpn-label receive-label-value [ [ control-word no-control-word ] [ raw tagged ] ] * The SVC VLL is created. ----End 12

20 1 VLL Configuration Checking the Configuration After an SVC VLL is configured, you can view information about the SVC connection and interfaces of the SVC connection. Prerequisite Procedure The configurations of the SVC VLL function are complete. Run the display static-l2vc [ interface interface-type interface-number ] command to check the SVC L2VPN connection information on the PE. Run the display l2vpn ccc-interface vc-type static-vc [ down up ] command to check the interface information of the SVC connections in Up/Down state. ----End Example Run the display static-l2vc command. You can find that the VC status is Up. For example: <Quidway> display static-l2vc Total svc connections: 1, 1 up, 0 down *Client Interface : Vlanif10 is up AC Status VC State VC ID : 0 VC Type : VLAN Destination : Transmit VC Label : 100 Receive VC Label : 200 Control Word : Disable VCCV Capability : alert lsp-ping bfd Tunnel Policy Name : -- Traffic Behavior : -- PW Template Name : -- Main or Secondary : Main Create time : 0 days, 0 hours, 6 minutes, 44 seconds UP time : 0 days, 0 hours, 6 minutes, 44 seconds Last change time : 0 days, 0 hours, 6 minutes, 44 seconds VC last up time : 2010/07/24 12:31:31 VC total up time : 0 days, 2 hours, 12 minutes, 51 seconds CKey : 16 NKey : 15 Run the display l2vpn ccc-interface vc-type static-vc up command. You can find that the VC type is SVC and the status is Up. For example: <Quidway> display l2vpn ccc-interface vc-type static-vc up Total ccc-interface of SVC VC: 1 up (1), down (0) Interface Encap Type State VC Type Vlanif1110 vlan up static-vc 1.5 Configuring Martini VLL This section describes how to configure a Martini VLL. To configure the Martini VLL, you need to establish the point-to-point link to implement L2VPN, and use the Label Distribution Protocol (LDP) to transmit Layer 2 information and VC labels. 13

21 1 VLL Configuration Establishing the Configuration Task Applicable Environment Pre-configuration Tasks Data Preparation Before configuring a Martini VLL, familiarize yourself with the applicable environment, complete the pre-configuration tasks, and obtain the required data. This can help you complete the configuration task quickly and accurately. In Martini mode, double-layer labels are adopted. The inner label uses the extended LDP as the signaling protocol to transmit the Layer 2 information and the VC label. In Martini mode, an LSP between two PEs can be shared by multiple VCs. Information about the VC label and LSP is stored only on the PE devices. The P devices do not store any Layer 2 VPN information. Therefore, Martini mode features excellent extensibility. When a new VC is needed, you only need to configure a unidirectional VC on each PE device of the two ends. The network operation is not affected. Before configuring Martini VLL, you need to complete the following tasks: Configuring the static route or IGP for the MPLS backbone network (PE or P) to implement IP connectivity Enabling basic MPLS functions on PEs and Ps. Establishing an LDP session between PEs which are connected directly, or establishing a remote LDP session between PEs which are connected indirectly To configure Martini VLL, you need the following data. No. Data 1 Type and number of the interface accessing CE 2 Destination address and VC ID of L2VC Enabling MPLS L2VPN Context Procedure Before configuring a Martini VLL, you must enable MPLS L2VPN. Do as follows on the PEs of the two ends of the VC: Step 1 Run: system-view The system view is displayed. 14

22 1 VLL Configuration Step 2 Run: l2vpn The MPLS L2VPN is enabled. ----End Creating a Martini VLL Connection Context Do as follows on the PEs on the two ends of the VC. Procedure Step 1 Run: system-view The system view is displayed. Step 2 Run: l2vpn The MPLS L2VPN view is displayed. Step 3 Run: l2vpn default martini The Martini mode is enabled. NOTE By default, the S5700 uses pseudo wire emulation edge-to-edge (PWE3) mode. The PWE3 mode can use Notification messages to negotiate the PW status. The Martini mode, however, does not support Notification messages. For details about Notification messages, see the chapter 2.1 Introduction to PWE3. If the peer PE does not support Notification messages, you need to set the mode to Martini by using the l2vpn default martini command. Before using the l2vpn default martini command to enable the Martini mode that does not support Notification messages, delete the VC configuration related to notification messages, including the PWE3 configuration. Step 4 Run: quit Return to the system view. Step 5 Run: interface interface-type interface-number The AC interface view is displayed. Step 6 (Optional) Run: undo portswitch The Layer 2 interface is configured as a Layer 3 interface. 15

23 1 VLL Configuration NOTE To use an XGE interface, a GE interface, or an Eth-Trunk interface of the S5700 as the AC interface of the PE, you need to run undo portswitch to configure the Layer 2 interface as a Layer 3 interface. Step 7 Run: l2vc { ip-address pw-template pw-template-name } * vc-id [ group-id groupid [ control-word no-control-word ] [ raw tagged ] mtu mtu-value secondary ] * The Martini VLL is created. The Martini L2VC requires the VC IDs of the VCs of the same encapsulation type on a PE to be unique. The change of the encapsulation type may cause collision of VC IDs. ----End Checking the Configuration After a Martini VLL is configured, you can view information about the two ends of the Martini VLL. Prerequisite Procedure The configurations of the Martini VLL function are complete. Run the display l2vc [ vc-id interface interface-type interface-number ] command to check the Martini VLL connection information on the local PE. Run the display l2vc remote-info [ vc-id ] command to check the peer Martini VLL connection information on the local PE. ----End Example Run the display l2vc command. You can find that destination is the peer IP address of the specified VC and VC state is up. For example: <Quidway> display l2vc total LDP VC : 1 1 up 0 down *client interface : Vlanif1111 Administrator PW : no session state AC status VC state VC ID : 101 VC type : VLAN destination : local VC label : 8195 remote VC label : 8195 control word : disable forwarding entry : exist local group ID : 0 manual fault : not set active state : active link state local VC MTU : 1500 remote VC MTU : 1500 tunnel policy name : -- traffic behavior name: -- PW template name : -- 16

24 1 VLL Configuration primary or secondary : primary create time : 0 days, 0 hours, 6 minutes, 48 seconds up time : 0 days, 0 hours, 5 minutes, 9 seconds last change time : 0 days, 0 hours, 5 minutes, 9 seconds VC last up time : :31:31 VC total up time : 0 days, 2 hours, 12 minutes, 51 seconds CKey : 16 NKey : 15 AdminPw interface : -- AdminPw link state : -- Run the display l2vc remote-info command. You can find that the peer address is the peer address of the specified VC. For example: <Quidway> display l2vc remote-info Total remote ldp vc : 1 Transport Group Peer Remote Remote C MTU/ N S VC ID ID Addr Encap VC Label Bit CELLS Bit Bit vlan Configuring VLL FRR This section describes how to configure VLL Fast Re-route (FRR). After VLL FRR is configured, the VLL traffic is switched to the secondary path if the primary path fails. If the primary path recovers, the VLL traffic can be switched back to it according to the revertive switching policy Establishing the Configuration Task Applicable Environment VLL FRR Supported by the S5700 is mainly used in the networking modes of asymmetrically connected CEs: The CE on one end of the VC accesses the PE of higher reliability through a single reliable link. The CE on the other end is dual-homed to the PE of lower reliability. Thus, two communication paths exist between the CEs. The path of higher reliability functions as the master path, and the path with the lower reliability functions as the backup path. After the VLL FRR is configured, L2VPN traffic is rapidly switched to the backup path when a fault occurs on the master path. After the fault on the master path is rectified, the L2VPN traffic is switched back to the master path according to the revertive switchover policy. NOTE For asymmetrically connected CEs, the primary and secondary IP addresses need to be configured on the interface connecting the CE to the PE through a single link. When the master path is available, the CE uses the primary IP address to communicate with the remote CE. When a fault occurs on the master path, the local CE communicates with the remote CE by using the secondary IP address. Pre-configuration Tasks Before configuring VPN FRR, complete the following tasks: Configuring a PW on each of the master path and backup path for the networking where CEs are asymmetrically connected to PEs (The types of PWs on the master path and backup path must be the same.) 17

25 1 VLL Configuration Configuring CEs to exchange routing information by using routing protocols or static routes NOTE To configure a Martini VLL or PWE3 for VLL FRR, you must use the PW template to configure a PW, enable the control word in the PW template. In the networking where CEs are asymmetrically connected to PEs, the backup PW cannot transmit data when the master path and backup path work normally. If the AC interface of the backup PW borrows the IP address of the AC interface of the master PW, the following situations occur: The policy of none revertive switchover cannot be configured. The local CE has two equal-cost and direct routes to the remote CE. The destination addresses and next hops of the two routes are the same. Actually, the route that passes through the backup PW is invalid. If CEs exchange routing information by using routing protocols, you need to modify the cost or metric of the AC interface of the backup path to be greater than that of the AC interface of the master path. The local CE cannot communicate with the peer CE, but can communicate with other user devices. If CEs use static routes to exchange routing information, you need to modify the preference of the backup route to be lower than that of the primary route (the greater the value, the lower the preference) by using the ip route-static dest-ip-address mask out-interface preference preference-value command. Data Preparation To configure VLL FRR, you need the following data. No. Data 1 Delay for revertively switching traffic when faults are cleared and the delay for advertising fault recovery (by default, the delay for revertively switching traffic is 30 seconds and the delay for advertising fault recovery is 10 seconds.) 2 Link type of the AC interface Configuring Master and Backup PWs In the networking where CEs are asymmetrically connected to PEs, you need to configure master and backup PWs. Context In the networking where CEs are asymmetrically connected to PEs, you need to configure master and backup PWs. The master and backup PWs must be of the same type. NOTE VLL FRR supports only LDP PWs, that is, Martini VLL. When using XGE, GE, or Eth-Trunk interfaces as AC interfaces, you need to run the undo portswitch command in the current interface view before configuring master and backup PWs. Procedure LDP PW 1. Run: system-view 18

26 1 VLL Configuration The system view is displayed. 2. Run: l2vpn The MPLS L2VPN view is displayed. 3. Run: l2vpn default martini The system switches to the Martini mode. 4. Run: quit 5. Run: 6. Run: NOTE Before using the l2vpn default martini command to set the behavior of the dynamic VC signaling to non-notification mode, you need to delete the configurations of VCs (including PWE3 VCs) that support the Notification signaling. Return to the system view. interface interface-type interface-number The AC interface view is displayed. l2vc { ip-address pw-template pw-template-name } * vc-id [ groupid group-id [ control-word no-control-word ] [ raw tagged ] mtu mtu-value ] * The master PW is configured. 7. Run: NOTE Before using a PW template to create a PW, you need to configure a PW template. For details, refer to 2.3 Configuring the Attributes of a PW Template. l2vc { ip-address pw-template pw-template-name } * vc-id [ groupid group-id [ control-word no-control-word ] [ raw tagged ] mtu mtu-value ] * secondary The backup PW is configured. ----End NOTE Both master and backup PWs need to be configured on the PE to which a CE is singlehomed. Only the master PW needs to be configured on the PE to which a CE is dual-homed. Master and backup PWs must have different VC IDs. The control word configuration on the primary and secondary PWs must be the same. Otherwise, lots of packets will be lost after the primary/secondary PW switchover (Optional) Configuring Fast Fault Notification - Physical Layer Fault Notification Physical layer fault notification expedites fault detection and notification. 19

27 1 VLL Configuration Context The S5700 supports physical layer fault notification, which can be configured only on the Ethernet main interface. Configure physical layer fault notification on the PE. Procedure Step 1 Run: system-view The system view is displayed. Step 2 Run: interface interface-type interface-number The AC interface view is displayed. The AC interface must be a primary Ethernet interface. The AC interface is configured with an VC. Step 3 Run: l2vpn trigger if-down Physical layer fault notification is enabled. ----End (Optional) Configuring BFD for PW BFD for PW expedites the fault detection on the public network. Context Example BFD for PW, which speeds up fault detection, is recommended. Static BFD for PW or dynamic BFD for PW can be configured on PEs. For detailed configuration, see the following sections: 2.8 Configuring Static BFD for PW 2.9 Configuring Dynamic BFD for PW NOTE BFD for PW must be configured or deleted on the PEs at the both ends of a PW simultaneously. Otherwise, the PW statuses on the two PEs are different (Optional) Configuring the Revertive Switchover The revertive switching policies can be classified into three modes: immediate revertive mode, delayed revertive mode, and non-revertive mode. By default, the revertive switching policy is in delayed revertive mode. 20

28 1 VLL Configuration Context When CEs are connected to PEs asymmetrically, do as follows on the PE (where traffic is switched) to which a CE is connected through a single link: Procedure Step 1 Run: system-view The system view is displayed. Step 2 Run: interface interface-type interface-number The AC interface view is displayed. Step 3 Run: l2vpn reroute { { delay delay-time immediately } [ resume resume-time ] never } The revertive switchover policy is configured. The types of the revertive switchover on PEs are as follows: Immediate revertive switchover: The local PE immediately switches traffic to the master PW and notifies the fault to the remote PE of the backup PW. The PE notifies the rectification of the fault to the remote PE of the backup PW after the period of resume-time. Delayed revertive switchover: The PE switches traffic to the master PW after the period of delay-time. None revertive switchover: The PE does not switch traffic to the master PW until the backup PW is faulty. For an asymmetric networking, in which ACs are of the Ethernet type, note the following: If the remote shutdown function is configured on the interface of a PE that connects a CE, you are recommended not to use the policy of immediate revertive switchover, which may lead to network flapping and traffic loss. On the other hand, you can use the policy of delayed revertive switchover to set delay-time equal to or more than 30 seconds. If the Ethernet OAM function is configured on the interface of a PE that connects a CE, and a revertive switchover policy is also configured, you cannot set resume-time to be 0 seconds, but be equal to or longer than one second. ----End Checking the Configuration Procedure Run the display l2vc [ vc-id interface interface-type interface-number ] command to view information about the local end of the Martini VC. Run the display l2vc remote-info [ vc-id ] command to view information about the remote end of the Martini VC. ----End 21

29 1 VLL Configuration Example Run the display l2vc [ vc-id interface interface-type interface-number ] command, and you can see that the status of the master and backup PWs is Up, the VC status of the master PW is active, and VC status of the backup PW is inactive. The following is an example: <Quidway> display l2vc interface vlanif 300 *client interface : Vlanif300 is up Administrator PW : no session state AC state VC state VC ID : 100 VC type : VLAN destination : local group ID : 0 remote group ID : 0 local VC label : 8195 remote VC label : 8195 local AC OAM State local PSN State local forwarding state : forwarding local status code : 0x0 remote AC OAM state remote PSN state remote forwarding state: forwarding remote status code : 0x0 BFD for PW : available manual fault : not set active state : active forwarding entry : exist link state local VC MTU : 1500 remote VC MTU : 1500 local VCCV : alert lsp-ping bfd remote VCCV : alert lsp-ping bfd local control word : disable remote control word : disable tunnel policy name : -- traffic behavior name : -- PW template name : -- primary or secondary : primary VC tunnel/token info : 1 tunnels/tokens NO.0 TNL type : lsp, TNL ID : 0x create time : 0 days, 18 hours, 20 minutes, 27 seconds up time : 0 days, 0 hours, 0 minutes, 0 seconds last change time : 0 days, 18 hours, 20 minutes, 27 seconds VC last up time : 2010/12/01 10:00:00 VC total up time : 0 days, 2 hours, 20 minutes, 0 seconds CKey : 4 NKey : 3 PW redundancy mode : -- AdminPw interface : -- AdminPw link state : -- *client interface : Vlanif300 is up Administrator PW : no session state AC state VC state VC ID : 200 VC type : VLAN destination : local group ID : 0 remote group ID : 0 local VC label : 8195 remote VC label : 8195 local AC OAM State local PSN State local forwarding state : forwarding local status code : 0x0 remote AC OAM state remote PSN state 22

30 1 VLL Configuration remote forwarding state: forwarding BFD for PW : available manual fault : not set active state : inactive forwarding entry : exist link state local VC MTU : 1500 remote VC MTU : 1500 local VCCV : alert lsp-ping bfd remote VCCV : alert lsp-ping bfd local control word : disable remote control word : disable tunnel policy name : -- traffic behavior name : -- PW template name : -- primary or secondary : secondary VC tunnel/token info : 1 tunnels/tokens NO.0 TNL type : lsp, TNL ID : 0x create time : 0 days, 18 hours, 20 minutes, 27 seconds up time : 0 days, 0 hours, 0 minutes, 0 seconds last change time : 0 days, 18 hours, 20 minutes, 27 seconds VC last up time : 2010/12/01 10:00:00 VC total up time : 0 days, 2 hours, 20 minutes, 0 seconds CKey : 5 NKey : 3 PW redundancy mode : -- AdminPw interface : -- AdminPw link state : -- reroute policy : delay 30 s, resume 10 s reason of last reroute : -- time of last reroute : -- days, -- hours, -- minutes, -- seconds delay timer ID : -- residual time :-- resume timer ID : -- residual time :-- Run the display l2vc remote-info command, and you can see that Peer Addr is the peer address of the VC. The following is an example: <Quidway> display l2vc remote-info Total remote ldp vc : 2 Transport Group Peer Remote Remote C MTU/ N S VC ID ID Addr Encap VC Label Bit CELLS Bit Bit vlan vlan Maintaining VLL This section describes how to maintain a VLL. Detailed operations include monitoring the L2VPN running status Enabling Traffic Statistics on the VLL This section describes how to enable the function of collecting statistics on VLL traffic before viewing VLL traffic statistics. Context You can collect statistics on VLL traffic on the user-side interfaces that are bound to the VLL. In this case, you need to enable the function of collecting statistics on VLL traffic on the device before the VLL connection is set up. 23

31 1 VLL Configuration Procedure Step 1 Run: system-view The system view is displayed. Step 2 Run: l2vpn traffic-statistics enable The traffic statistics on the VLL is enabled. The function of collecting traffic statistics is only valid to the VLL connection that is created after this function is enabled. ----End Viewing Traffic Statistics on the VLL This section describes how to view VLL traffic statistics on the specified interface. Procedure Run: display traffic-statistics l2vpn interface interface-type interface-number ----End The VLL traffic statistics on the specified interface are displayed. To view VLL traffic statistics, you need to enable the function of collecting traffic statistics on the VLL before the VLL connection is set up Resetting Traffic Statistics on the VLL This section describes how to reset VLL traffic statistics on the specified interface. Procedure Run the following command in the user view: reset traffic-statistics l2vpn interface interface-type interface-number ----End The VLL traffic statistics on the specified interface are reset Monitoring the Running Status of VLL This part describes how to monitor the L2VPN running status by viewing the L2VPN connection information. Context During the routine maintenance, you can run the following commands in any view to know the running status of VLL. 24

32 1 VLL Configuration Procedure Run the display vll ccc [ ccc-name type { local remote } ] command to check information about the CCC connection. Run the display static-l2vc [ interface interface-type interface-number ] command to check information about the SVC VLL connection. Run the display l2vc [ vc-id interface interface-type interface-number ] command to check information about the local Martini VLL connection on the PE. ----End Debugging VLL Context When a VLL fault occurs, run the relevant debugging command to debug the fault, view the debugging information, locate the fault, and analyze the cause. CAUTION Debugging affects the performance of the system. So, after debugging, run the undo debugging all command to disable it immediately. When a fault occurs, run the following debugging commands in the user view to locate the fault. For the procedure of displaying the debugging information, refer to the chapter "System Maintenance" in the Quidway S5700 Series Ethernet Switches Configuration Guide - Device Management. Procedure Run the debugging l2vpn { all advertisement download error event messagemerge reroute timer connections [ interface interface-type interface-number ] } command in the user view to enable the debugging of the VLL. ----End Checking Connectivity of the VLL Network Prerequisite The VLL connectivity can be checked through the ping or tracert command. Before using the ping or tracert command to check connectivity of a VLL network, you need to ensure that the VLL network is correctly configured. The channel types supported by the VLL network in Martini mode are listed in the "Procedure" part. By default, VCCV in Label Alert mode is enabled. Before using the control word channel, you need to run the control-word command to enable the control word function. After that, VCCV in control word channel mode is enabled. 25

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