Configuring the Cisco MWR 2941-DC Router Using the CLI

Transcription

1 CHAPTER 4 Configuring the Cisco MWR 2941-DC Router Using the CLI This chapter describes how to use the Cisco IOS software command-line interface (CLI) to configure the Cisco MWR 2941-DC Mobile Wireless Edge Router and includes the following sections: Verifying the Cisco IOS Software Version, page 4-1 Configuration Sequence, page 4-2 Monitoring and Managing the Cisco MWR 2941-DC Router, page 4-86 For sample configurations, see Appendix A, Sample Configurations. For additional configuration topics, see the Cisco IOS configuration guide and command reference publications. These publications are available online at Cisco.com, or as printed copies that you can order separately. If you skipped Chapter 2, Cisco IOS Software Basics, and you have never configured a Cisco router, return to Chapter 2 and read it now. The chapter contains important information that you need to successfully configure your router. Verifying the Cisco IOS Software Version To implement the Cisco MWR 2941-DC router in a RAN-O solution, Cisco IOS Release 12.4(19)MR2 or later must be installed on the router. To verify the version of Cisco IOS software, use the show version command. The show version command displays the configuration of the system hardware, the software version, the names and sources of the configuration files, and the boot images. 4-1

2 Configuration Sequence Chapter 4 Configuration Sequence The Summary of Steps section provides the recommended primary configuration sequence for the Cisco MWR 2941-DC router. These steps have configuration substeps (or tasks) within the primary steps or tasks. The installation of the Cisco MWR 2941-DC router and the Cisco T1/E1 interface card should be completed before attempting the configuration (see the Related Documentation section on page xi for more information). The configuration sequence of the Cisco MWR 2941-DC router assumes that you will have already had some familiarity with the configuration of Cisco routers. It is also assumed that you are familiar with your own network configurations and that you are familiar with the Command Line Interface (CLI) used in configuring Cisco routers. For correct CLI syntax and format, see the Appendix B, Cisco MWR 2941-DC Router Command Reference. Summary of Steps To configure the Cisco MWR 2941-DC router, perform the following tasks. 1. Configuring the Hostname and Password 2. Verifying the Hostname and Password, page Configuring Gigabit Ethernet Interfaces, page Configuring Layer 2 Interfaces, page Configuring HWIC-D-9ESW Interfaces, page Configuring HWIC-1GE-SFP Interfaces, page Configuring VLANs, page Configuring Clocking and Timing, page Configuring DSL Backhaul, page Configuring Pseudowire, page Configuring MLPPP Backhaul, page Configuring GSM-Abis Links, page Configuring Multiprotocol Label Switching (MPLS), page Configuring Routing Protocols, page Configuring BFD, page Configuring Layer 3 Virtual Private Networks (VPNs), page Configuring Quality of Service (QoS), page Configuring Satellite Support, page Configuring Graceful Degradation, page Saving Configuration Changes, page

3 Chapter 4 Configuration Sequence Configuring the Hostname and Password First configure the hostname and set an encrypted password. Configuring a hostname allows you to distinguish multiple Cisco routers from each other. Setting an encrypted password allows you to prevent unauthorized configuration changes. In the following procedure, press the Return key after each step unless otherwise noted. At any time, you can exit the privileged level and return to the user level by entering disable at the Router# prompt. To configure a hostname and to set an encrypted password, follow these steps: Enter enable mode. Router> enable The Password prompt appears. Enter your password. Password: password When the prompt changes to Router, you have entered enable mode. Enter global configuration mode. Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. When the prompt changes to Router(config), you have entered global configuration mode. Router(config)# Change the name of the router to a meaningful name. Substitute your hostname for Router. Router(config)# hostname Router Router(config)# Step 5 Enter an enable secret password. This password provides access to privileged EXEC mode. When you type enable at the EXEC prompt (Router>), you must enter the enable secret password to access configuration mode. Enter your secret password. Router(config)# enable secret secret password Exit back to global configuration mode. Router(config)# exit Verifying the Hostname and Password To verify that you have correctly configured the hostname and password, follow these steps Enter the show config command: Router# show config Using 1888 out of bytes! 4-3

4 Configuration Sequence Chapter 4 version XX.X...! hostname Router! enable secret 5 $1$60L4$X2JYOwoDc0.kqa1loO/w8/... Check the hostname and encrypted password, which appear near the top of the command output. Exit global configuration mode and attempt to re-enter it using the new enable password: Router# exit... Router con0 is now available Press RETURN to get started. Router> enable Password: password Router# Configuring Gigabit Ethernet Interfaces To configure the Gigabit Ethernet (GE) interface on the Cisco MWR 2941-DC, complete the following tasks: Configuring the Interface Properties, page 4-4 Setting the Speed and Duplex Mode, page 4-5 Enabling the Interface, page 4-6 Configuring the Interface Properties Creating Backup Switch Interfaces, page 4-6 In the following procedure, press the Return key after each step unless otherwise noted. At any time, you can exit the privileged level and return to the user level by entering disable at the Router# prompt. The spanning tree-related commands described in this section are optional. To configure the GE interface, follow these steps while in global configuration mode: Specify the port adapter type and the location of the interface to be configured. Router(config)# interface gigabitethernet slot/port Router(config-if)# The slot is always 0 and the port is the number of the port (0 or 1). 4-4

5 Chapter 4 Configuration Sequence Step 5 Step 6 To set the interface type, use the switchport mode command. Router(config-if)# switchport mode {access trunk} To prioritize an interface when two bridges compete for position as the root bridge, use the spanning tree port-priority command. Router(config-if)# spanning-tree port-priority port_priority To calculate the path cost of STP on an interface, use the spanning-tree cost command. Router(config-if)# spanning-tree cost port_cost For interfaces that connect to end stations, you can use the spanning-tree portfast command to set the interface to move directly to the spanning-tree forwarding state when linkup occurs. Router(config-if)# spanning-tree portfast To enable Cisco Discovery Protocol (CDP) on the router, use the cdp enable command. Router(config-if)# cdp enable Setting the Speed and Duplex Mode The Gigabit Ethernet ports of the Cisco MWR 2941-DC router can run in full or half- duplex mode 100 Mbps or 1000 Mbps (1 Gbps). The Cisco MWR 2941-DC router has an autonegotiation feature that allows the router to negotiate the speed and duplex mode with the corresponding interface at the other end of the connection. Autonegotiation is the default setting for the speed and transmission mode. When you configure an interface speed and duplex mode, follow these guidelines: If both ends of the line support autonegotiation, we highly recommend the use of default autonegotiation settings. When autonegotiation is turned on for either speed or duplex mode, it autonegotiates both speed and the duplex mode. If one interface supports autonegotiation, and the interface at the other end does not, configure the duplex mode and speed on both interfaces. If you use the autonegotiation setting on the supported side, the duplex mode setting is set at half-duplex. In the following procedure, press the Return key after each step unless otherwise noted. At any time, you can exit the privileged level and return to the user level by entering disable at the Router# prompt. To configure speed and duplex operation, follow these steps while in interface configuration mode: Specify the duplex operation. Router(config-if)# duplex [auto half full] Specify the speed. Router(config-if)# speed [auto ] 4-5

6 Configuration Sequence Chapter 4 Enabling the Interface In the following procedure, press the Return key after each step unless otherwise noted. At any time, you can exit the privileged level and return to the user level by entering disable at the Router# prompt. After you configure the GE interface, enable it using the no shutdown command.by following this step Router(config-if)# no shutdown Creating Backup Switch Interfaces You can use the following command to create a backup switch interface: Router(config-if)# switchport backup interface interface_name preemption [forced bandwidth off] delay [time] For more information about this command, see switchport backup, page B-429 For instructions on how to create VLANs on GE interfaces, see Configuring VLANs, page Configuring Layer 2 Interfaces The Cisco MWR 2941-DC has an onboard layer 2 Gigabit Ethernet switch and supports HWICs with layer 2 interfaces.to configure the layer 2 interfaces on the Cisco MWR 2941-DC, complete the following tasks: Configuring a Range of Interfaces Defining a Range Macro Configuring a Range of Interfaces Configuring Layer 2 Optional Interface Features The interface-range command allows you to configure multiple interfaces at once. Follow these steps to configure an interface range. Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# 4-6

7 Chapter 4 Configuration Sequence Use the interface-range command to select a range on interfaces to configure. You can specify a range that includes both VLANs and physical interfaces. Router(config)# interface range GigabitEthernet 0/1-3 Due to an open caveat, you cannot use interface-range command with the service-policy command. To apply a service-policy to a range of interfaces, configure each interface individually. Defining a Range Macro A range macro allows you to create a name that defines a range on interfaces on the Cisco MWR 2941-DC. Follow these steps to configure an interface range macro. Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Use the interface-range command to define the macro. Router(config)# define interface-range first_three GigabitEthernet0/1-2 You can use the show running-configuration command to verify the interface-range macro configuration. Configuring Layer 2 Optional Interface Features Interface Speed and Duplex Configuration Guidelines Configuring the Interface Speed Configuring the Interface Duplex Mode Configuring a Description for an Interface Configuring a Layer 2 Interface as a Layer 2 Trunk Configuring a Layer 2 Interface as Layer 2 Access Interface Speed and Duplex Configuration Guidelines When configuring an interface speed and duplex mode, note these guidelines: Speed and duplex commands only apply to FastEthernet interfaces. They do not apply to the onboard Gigabit Ethernet ports. If both ends of the line support autonegotiation, Cisco highly recommends the default auto negotiation settings. 4-7

8 Configuration Sequence Chapter 4 If one interface supports auto negotiation and the other end does not, configure duplex and speed on both interfaces; do not use the auto setting on the supported side. Both ends of the line need to be configured to the same setting; for example, both hard-set or both auto-negotiate. Mismatched settings are not supported. Caution Changing the interface speed and duplex mode configuration might shut down and reenable the interface during the reconfiguration. Configuring the Interface Speed Follow these steps to configure the speed of a layer 2 interface. Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Enter configuration for the interface that you want to modify. Router(config)# interface fastethernet 1/0 Specify the interface speed. You can set an interface to 10 Mbps, 100 Mbps, or autonegotiate. Router(config-if)# speed [ auto ] Configuring the Interface Duplex Mode Follow these steps below to set the duplex mode of a layer 2 interface. Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Enter configuration for the interface that you want to modify. Router(config)# interface fastethernet 1/1 Use the duplex command to set the interface to send traffic at full duplex, half duplex, or to autonegotiate its duplex setting. Router(config-if)# duplex [auto full half] You can use the show interfaces command to verify the duplex configuration. 4-8

9 Chapter 4 Configuration Sequence If you set the port speed to auto on a 10/100-Mbps Ethernet interface, the interface auto-negotiates the speed and duplex settings. You cannot change the duplex mode of interfaces set to auto-negotiation. Configuring a Description for an Interface You can add a description of an interface to help you remember its function. The description appears in the output of the following commands: show configuration, show running-config, and show interfaces. Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Enter configuration for the interface that you want to modify. Router(config)# interface fastethernet 0/1 Use the description command to assign a description to the interface. Router(config-if)# description newinterface Configuring a Layer 2 Interface as a Layer 2 Trunk Follow these steps to configure an interface as a Layer 2 trunk. Step 5 Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Enter configuration for the interface that you want to modify. Router(config)# interface gigabitethernet 0/1 Router(config-if)# Shut down the interface. Router(config-if)# shutdown Use the switchport mode trunk command to configure the interface as a Layer 2 trunk. Router(config-if)# switchport mode trunk 4-9

10 Configuration Sequence Chapter 4 Step 6 Step 7 The encapsulation is always set to dot1q. If you are configuring an 802.1Q trunk, specify the native VLAN. Otherwise, proceed to the next step. Router(config-if)# switchport trunk native vlan 1 Use the switchport trunk allowed vlan command to configure the list of VLANs allowed on the trunk. The add, except, none, or remove keywords specify the action to take for the specified VLANs. Router(config-if)# switchport trunk allowed vlan add vlan1, vlan2, vlan3 Step 8 Step 9 All VLANs are allowed by default. You cannot remove any of the default VLANs from a trunk. Activate the interface. Router(config-if)# no shutdown Exit configuration mode. Router(config-if)# end Router# You can use the show running-configuration command to verify the layer 2 trunk configuration. Configuring a Layer 2 Interface as Layer 2 Access Follow these steps below to configure a Fast Ethernet interface as Layer 2 access. Step 5 Enter enable mode. Router> enable Router# Enter configuration mode. Router# configure terminal Router(config)# Enter configuration for the interface that you want to modify. Router(config)# interface gigabitethernet 0/1 Router(config-if)# Shut down the interface. Router(config-if)# shutdown Use the switchport mode access command to configure the interface as a Layer 2 access. Router(config-if)# switchport mode trunk Use the switchport access vlan command to specify an access VLAN for access ports. Router(config-if)# switchport access vlan 1 Step 6 Activate the interface. Router(config-if)# no shutdown 4-10

11 Chapter 4 Configuration Sequence Step 7 Exit configuration mode. Router(config-if)# end Router# You can use the show running-config interface command and the show interfaces command to verify layer 2 access configuration. Configuring HWIC-D-9ESW Interfaces For instructions on how to configure stacking on the HWIC-D-9ESW card, see Configuring Stacking. For more information about how to configure other features on the HWIC-D-9ESW Card, see Configuring Layer 2 Interfaces, page 4-6. Configuring Stacking Stacking allows two switch modules to behave as a single switch. Follow these steps to configure stacking for the HWIC-D-9ESW card. Step 5 Step 6 Enter configuration mode for FastEthernet port 8 of the HWIC-D-9ESW card. Router(config)# interface FastEthernet1/8 Use the no shutdown command to bring the interface to an active state. Router(config)# no shutdown Use the switchport stacking-partner command to specify the GigabitEthernet port that the HWIC-D-9ESW FastEthernet port uses as a stacking partner. router(config-if)# switchport stacking-partner interface GigabitEthernet0/2 Enter the exit command to exit the FastEthernet interface configuration. Router(config-if)# exit Router(config)# Enter configuration mode for the GigabitEthernet port that you want to use as a stacking partner. Router(config)# interface GigabitEthernet0/2 Use the no shutdown command to bring the interface to an active state. Router(config)# no shutdown Step 7 Once you configure the FastEthernet port as a stacking partner, the corresponding GigabitEthernet interface is automatically configured as a stacking partner. Connect a crossover Ethernet cable from FastEthernet port 8 of the HWIC-D-9ESW card to the GigabitEthernet port that you want to use as a stacking partner. 4-11

12 Configuration Sequence Chapter 4 For more detailed instructions, see the Cisco MWR 2941-DC Mobile Wireless Edge Router Hardware Installation Guide. Configuring HWIC-1GE-SFP Interfaces The HWIC-D-9ESW card interfaces are layer 3 Ethernet interfaces. Follow these steps to configure interfaces on the HWIC-D-9ESW. The HWIC-1GE-SFP functions as a layer 3 routed port only; it does not function as a layer 2 switch. Interface performance is subject to the limitations of the host processor. Step 5 Step 6 Step 7 Enter enable mode. Router> enable Router# Type configure terminal to enter configuration mode. Router# configure terminal Router(config)# Specify the slot and port of the interface you want to configure. The the HWIC-1GE-SFP can use slots 1 or 2 in the router. Router(config)# interface gigabitethernet 2/0 Use the ip address command to assign an IP address and subnet mask to the interface. Router(config-if)# ip address ip_address subnet_mask Use the speed command to configure the interface speed. Router(config-if)# speed [auto ] Use the no shutdown command to enable the interface. Router(config-if)# no shutdown Exit configuration mode. Router(config-if)# exit Router(config)# Configuring VLANs The Cisco MWR 2941-DC router supports a full set of VLAN features. The following sections describe how to configure VLANs. Adding a VLAN Instance Deleting a VLAN Instance Configuring VLAN Trunking Protocol 4-12

13 Chapter 4 Configuration Sequence Adding a VLAN Instance You can create up to 15 VLANs on the HWIC-D-9ESW switch. Follow these steps to add a VLAN instance. Enter enable mode. Router> enable Router# Type configure terminal to enter configuration mode. Router# configure terminal Router(config)# Use the vlan command to add a new Ethernet VLAN. Router(config)# vlan 2 Exit VLAN configuration mode. Router(config)# exit Router# You can verify the VLAN configuration by using the show command in VLAN configuration mode or the show vlan-switch command in EXEC mode. Deleting a VLAN Instance Follow these steps to delete a VLAN from the database. You cannot delete Ethernet VLAN 1 and FDDI and Token Ring VLANs 1002 to Enter enable mode. Router> enable Router# Use the vlan database command to enter VLAN configuration mode. Router# vlan database Use the no vlan command to delete an Ethernet VLAN from the database. Router(vlan)# no vlan 1 Exit VLAN configuration mode. Router(vlan)# exit Router# You can use the show vlan-switch brief command in EXEC mode to verify that a VLAN has been deleted from the switch. 4-13

14 Configuration Sequence Chapter 4 Configuring VLAN Trunking Protocol Configuring a VTP Server This section describes how to configure the VLAN Trunking Protocol (VTP) on an EtherSwitch HWIC, and contains the following tasks: Configuring a VTP Server Configuring a VTP Client Disabling VTP When a switch is in VTP server mode, you can change the VLAN configuration and have it propagate throughout the network. Follow these steps to configure the switch as a VTP server. Step 5 Step 6 Enter enable mode. Router> enable Router# Use the vlan database command to enter VLAN configuration mode. Router# vlan database Use the vtp server command to configure the switch as a VTP server. Router(vlan)# vtp server Use the vtp domain command to defines the VTP domain name, which can be up to 32 characters long. Router(vlan)# vtp domain distantusers If you want to specify a password for the VTP domain, use vtp password command. The password can be from 8 to 64 characters long. This step is optional. Router(vlan)# vtp password philadelphis Exit VLAN configuration mode. Router(vlan)# exit Router# Configuring a VTP Client When a switch is in VTP client mode, you cannot change the VLAN configuration on the switch. The client switch receives VTP updates from a VTP server in the management domain and modifies its configuration accordingly. Follow these steps to configure a VTP client. Enter enable mode. Router> enable Router# Use the vlan database command to enter VLAN configuration mode. Router# vlan database Use the vtp client command to configure the switch as a VTP client. Router(vlan)# vtp client 4-14

15 Chapter 4 Configuration Sequence Exit VLAN configuration mode. Router(vlan)# exit Router# Disabling VTP You can disable VTP on a switch by configuring it to VTP transparent mode, meaning that the switch does not send VTP updates or act on VTP updates received from other switches. Follow these steps to disable VTP on the switch. Enter enable mode. Router> enable Router# Use the vlan database command to enter VLAN configuration mode. Router# vlan database Use the vtp transparent command to set the switch in VTP transparent mode. Router(vlan)# vtp transparent Exit VLAN configuration mode. Router(vlan)# exit Router# You can use the show vtp status command to verify the VTP status of the switch. Configuring Clocking and Timing The Cisco MWR 2941-DC supports the following network clocking types: Precision Time Protocol (PTP) Clocking and clock recovery based on the IEEE standard; allows the Cisco MWR 2941-DC router to receive clocking from another PTP-enabled device or provide clocking to a PTP-enabled device. To configure PTP clocking, see Configuring PTP Clocking. If you want to enable PTP redundancy, you must also complete the steps in the Configuring PTP Redundancy section. Pseudowire-based clocking Allows the Cisco MWR 2941-DC router to use clocking using a pseudowire or virtual pseudowire interface. Pseudowire-based clocking supports adaptive clock recovery, which allows the Cisco MWR 2941-DC to recover clocking from the headers of a packet stream. To configure pseudowire-based clocking, see Configuring Pseudowire-based Clocking with Adaptive Clock Recovery Synchronous Ethernet Allows the network to transport frequency and time information over Ethernet. To configure synchronous Ethernet, use the network-clock-select command described in the Configure the Global Network Clock section. 4-15

16 Configuration Sequence Chapter 4 Network Timing Reference Enables to receive clocking using the DSL interface. For instructions on how to configure Network Timing Reference (NTR), see Configuring Network Timing Reference. The Cisco MWR 2941-DC does not support clocking and timing on the HWIC-D-9ESW and HWIC-1GE-SFP cards. The Cisco MWR 2941-DC does not support the use of PTP and PWE-based clocking at the same time. Configuring PTP Clocking This section describes how to configure PTP-based clocking on the Cisco MWR 2941-DC. For more information about the PTP commands, see, Appendix B, Cisco MWR 2941-DC Router Command Reference. The Cisco MWR 2941-DC supports PTP traffic on the following interface types: Onboard Gigabit Ethernet interfaces. DSL interfaces The settings shown in this section are an example only; you must determine the appropriate PTP settings based upon your network clocking design. Configuring Global PTP Settings Enter the following commands to configure the global PTP settings: a. Use the ptp mode command to specify the PTP mode. Router(config)# ptp mode ordinary b. Use the ptp priority1 command to configure the preference level for a clock; slave devices use the priority1 value when selecting a master clock. Router(config)# ptp priority1 128 c. Use the ptp priority2 command to set a secondary preference level for a clock; slave devices use the priority2 value when selecting a master clock. Router(config)# ptp priority2 128 d. Use the ptp domain command to specify the PTP domain number that the router uses. PTP domains allow you to use multiple independent PTP clocking subdomains on a single network. Router(config)# ptp domain 6 If you want to use PTP redundancy, you must also complete the tasks in the Configuring PTP Redundancy, page

17 Chapter 4 Configuration Sequence Configuring the PTP Mode Table 4-1 summarizes the PTP mode commands that you can use on the Cisco MWR 2941-DC. If you want to use PTP redundancy, you must also complete the tasks in the Configuring PTP Redundancy, page Table 4-1 PTP Mode Commands Command ptp announce ptp clock-destination ptp clock-source ptp delay-req interval ptp enable ptp sync Purpose Sets interval and timeout values for PTP announcement packets. Specifies the IP address of a clock destination. This command only applies when the router is in PTP master unicast mode. Specifies the IP address of the clock source. This command only applies when the router is in PTP slave mode. Specifies the delay request interval, the time recommended to member devices to send delay request messages when an interface is in PTP master mode. Enables PTP mode on an interface Specifies the interval that the router uses to send PTP synchronization messages. The following examples demonstrate how to use these commands to configure each of the six PTP modes. Use the appropriate section based on the PTP mode that you want to configure on the Cisco MWR 2941-DC. To configure PTP on a DSL interface, apply the interface PTP commands to the dialer interface. For sample PTP over DSL configurations, see Appendix B, Cisco MWR 2941-DC Router Command Reference. PTP multicast master mode Sets the Cisco MWR 2941-DC to act as the master PTP clock. Multicast specifies that the router sends PTP messages to all the slaves listening on the PTP multicast group. Router(config)# interface Vlan10 Router(config-if)# ip address Router(config-if)# ip igmp join-group Router(config-if)# ptp announce interval 0 Router(config-if)# ptp sync interval -6 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp master multicast Router(config-if)# ptp enable PTP multicast slave mode Sets the Cisco MWR 2941-DC to receive clocking from a PTP master device in multicast mode. Router(config)# interface Vlan10 Router(config-if)# ip address Router(config-if)# ip igmp join-group Router(config-if)# ptp announce interval 0 Router(config-if)# ptp sync interval

18 Configuration Sequence Chapter 4 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp slave multicast Router(config-if)# ptp enable You can use the ptp delay-req unicast command to set the Cisco MWR 2941-DC to send unicast PTP Delay_Req messages while in multicast mode in order to eliminate unnecessary multicast traffic. For more information about this command, see Appendix B, Cisco MWR 2941-DC Router Command Reference. PTP unicast master mode Sets the Cisco MWR 2941-DC to act as the master PTP clock. Unicast specifies that the router sends PTP messages to a single slave host. Router(config)# interface Vlan2 Router(config-if)# ip address Router(config-if)# ptp announce interval 0 Router(config-if)# ptp sync interval -6 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp master unicast Router(config-if)# ptp clock-destination Router(config-if)# ptp enable PTP unicast slave mode Sets the Cisco MWR 2941-DC to receive clocking from a single PTP master device. Router(config)# interface Vlan2 Router(config-if)# ip address Router(config-if)# ptp announce interval 3 Router(config-if)# ptp announce timeout 2 Router(config-if)# ptp sync interval -6 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp slave unicast Router(config-if)# ptp clock-source Router(config-if)# ptp enable PTP unicast master mode (with negotiation enabled) Sets the Cisco MWR 2941-DC to send clocking to a single PTP slave device; the router allows the slave devices to negotiate their master clock device. When in the router is in PTP unicast master mode, you can specify up to 128 PTP clock destination devices. If you set the router to PTP master unicast mode with negotiation, you do not specify PTP clock destinations because the router negotiates to determine the IP addresses of the PTP slave devices. We recommend that you determine the number of destination devices to assign to a master clock based on traffic rates and available bandwidth. Router(config)# interface Vlan2 Router(config-if)# ip address Router(config-if)# ptp announce interval 0 Router(config-if)# ptp sync interval -6 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp master unicast negotiation Router(config-if)# ptp enable 4-18

19 Chapter 4 Configuration Sequence PTP unicast slave mode (with negotiation enabled) Sets the Cisco MWR 2941-DC to receive clocking from a PTP master devices; the router negotiates between up to 128 PTP master devices. Router(config)# interface Vlan2 Router(config-if)# ip address Router(config-if)# ptp announce interval 3 Router(config-if)# ptp announce timeout 2 Router(config-if)# ptp sync interval -6 Router(config-if)# ptp delay-req interval -4 Router(config-if)# ptp slave unicast negotiation Router(config-if)# ptp clock-source Router(config-if)# ptp enable You can only configure one VLAN interface for PTP. Configure the Global Network Clock Use the network-clock-select command to configure clock selection for the entire network. If you configured the router for PTP master mode, set one or more external clock sources using the network-clock-select command with the synchronous ethernet (synce), bits, E1, T1, or SHDSL interface parameters: Router(config)# network-clock-select 1 BITS Router(config)# network-clock-select 2 SYNC 0 Router(config)# network-clock-select 3 E1 0/0 Router(config)# network-clock-select 4 SHDSL 1/0.1 For SHDSL connections, the subinterface number represents the wire that the Cisco MWR 2941-DC uses to receive clocking. If you configured the router for PTP slave mode, enter the following commands: Router(config)# network-clock-select 1 PACKET-TIMING Router(config)# network-clock-select hold-timeout 900 For more information about the network-clock-select command, see Appendix B, Cisco MWR 2941-DC Router Command Reference. The minimum network-clock-select hold-timeout value recommended in the slave mode is 900 seconds or 15 minutes. 4-19

20 Configuration Sequence Chapter 4 Configuring Pseudowire-based Clocking with Adaptive Clock Recovery The Cisco MWR 2941-DC supports the following adaptive clock recovery modes: In-band master mode The Cisco MWR 2941-DC provides clocking to slave devices using the headers in a packet stream. To configure this clocking mode, see Configuring In-Band Master Mode. In-band slave mode The Cisco MWR 2941-DC receives clocking from a master clock using the headers from a packet stream. To configure this clocking mode, see Configuring In-Band Slave Mode. Out-of-band slave mode The Cisco MWR 2941-DC receives clocking from a master clock using dedicated packets for timing. To configure this clocking mode, see Configuring Out-of-Band Slave Mode. The Cisco MWR 2941-DC currently does not support out-of-band master mode. Configuring In-Band Master Mode To configure in-band ACR master mode, you must configure Structure-agnostic TDM over Packet (SAToP) or Circuit Emulation Service (CES). The following example shows how to configure SAToP. Router(config)# controller e1 0/0 Router(config-controller)# clock source internal Router(config-controller)# cem-group 0 unframed The following example shows how to configure CES. Router(config)# controller e1 0/0 Router(config-controller)# clock source internal Router(config-controller)# cem-group 3 timeslots 1-31 Step 5 Step 6 Configure the loopback interface. Router(config)# interface Loopback Router(config-if)# ip address Configure the VLAN interface. Router(config)# interface Vlan1 Router(config-if)# ip address Router(config-if)# no ptp enable Router(config-if)# mpls ip Configure MPLS. Router(config)# mpls ldp router-id Loopback0 force Configure the CEM interface. Router(config)# interface cem 0/1 Router(config-if)# cem 0 Router(config-if-cem)# xconnect encap mpls Set one or more external clock sources using the synce, bits, or E1 interface, or T1 interface parameters: Router(config)# network-clock-select 1 BITS 4-20

21 Chapter 4 Configuration Sequence Configuring In-Band Slave Mode To configure in-band ACR slave mode, you must configure Structure-agnostic TDM over Packet (SAToP) or Circuit Emulation Service (CES). The following example shows how to configure SAToP. Router(config)# controller e1 0/0 Router(config-controller)# clock source internal Router(config-controller)# cem-group 0 unframed The following example shows how to configure CES. Router(config)# controller e1 0/0 Router(config-controller)# clock source internal Router(config-controller)# cem-group 3 timeslots 1-31 Step 5 Step 6 Step 7 Enter the following commands to configure the loopback interface. Router(config)# interface Loopback Router(config-if)# ip address Enter the following commands to configure the VLAN interface. Router(config)# interface Vlan1 Router(config-if)# ip address Router(config-if)# no ptp enable Router(config-if)# mpls ip Enter the following command to configure MPLS. Router(config)# mpls ldp router-id Loopback0 force Enter the following commands to configure the CEM interface. Router(config)# interface cem 0/0 Router(config-if)# cem 0 Router(config-if-cem)# xconnect encap mpls Enter the following command to configure adaptive clock recovery using a circuit emulation (CEM) interface: Router(config)# recovered-clock recovered adaptive cem Enter the following commands to configure the network clock: Router(config)# network-clock-select 1 PACKET-TIMING Router(config)# network-clock-select hold-timeout 900 Configuring Out-of-Band Slave Mode When configuring out-of-band clocking, verify that the edge router (such as the Cisco 7600 Series Router) has matching settings for out-of-band clocking. Enter the following command to configure clock recovery in slave mode: Router(config)# recovered-clock slave Enter the following commands to configure the loopback interface. Router(config)# interface Loopback 4-21

22 Configuration Sequence Chapter 4 Router(config-if)# ip address Step 5 Step 6 Enter the following commands to configure the VLAN interface. Router(config)# interface Vlan1 Router(config-if)# ip address Router(config-if)# no ptp enable Router(config-if)# mpls ip Enter the following command to configure MPLS. Router(config)# mpls ldp router-id Loopback0 force Enter the following commands to configure the CEM interface: Router(config)# interface virtual-cem 0/24 Router(config-if)# payload-size 486 Router(config-if)# cem 0 Router(config-if-cem)# xconnect encap mpls The Cisco MWR 2941-DC only supports a payload size of 486 (625 packets per second) or 243 (1250 packets per second). This value affects the payload size only and does not alter the packet size, which is constant regardless of payload value. Step 7 Enter the following commands to configure the network clock: Router(config)# network-clock-select 1 PACKET-TIMING Router(config)# network-clock-select hold-timeout 900 Configuring PTP Redundancy The Cisco MWR 2941-DC supports PTP redundancy by allowing the Cisco MWR 2941-DC to act as a multicast router for PTP traffic between an external PTP client and one or more multicast PTP master clocks. Follow these steps to configure PTP redundancy on the Cisco MWR 2941-DC. Special IP routing protocols such as OSPF and IS-IS will be recognized based on protocol type and forwarded to the PPC host. This a basic routing requirement for these protocols and is not related to PTP redundancy. Use the ip multicast-routing command to enable multicast routing. Enter the following commands to configure a VLAN for the PTP client. Router(config)# interface vlan 100 Router(config-if)# description BT-750 client interface Router(config-if)# ip address Use the ip pim command to enable Protocol Independent Multicast (PIM) on the VLAN interface. You can specify the interface to use sparse, dense, or sparse-dense mode. For more information about the ip pim command, see the Appendix B, Cisco MWR 2941-DC Router Command Reference. Router(config-if)# ip pim sparse-dense-mode Enter the following commands to configure a VLAN for the first multicast PTP clock source. Router(config)# interface vlan 401 Router(config-if)# description Network interface sourcing PTP multicast Router(config-if)# ip address

23 Chapter 4 Configuration Sequence Step 5 Step 6 Step 7 Step 8 Step Use the ip pim command to enable Protocol Independent Multicast (PIM) on the VLAN interface. You can specify the interface to use sparse, dense, or sparse-dense mode. For more information about the ip pim command, see the Appendix B, Cisco MWR 2941-DC Router Command Reference. Router(config-if)# ip pim sparse-dense-mode Enter the following commands to configure a VLAN for the second multicast PTP clock source. Router(config)# interface vlan 402 Router(config-if)# description Network interface sourcing PTP multicast Router(config-if)# ip address Use the ip pim command to enable Protocol Independent Multicast (PIM) on the VLAN interface. You can specify the interface to use sparse, dense, or sparse-dense mode. For more information about the ip pim command, see the Appendix B, Cisco MWR 2941-DC Router Command Reference. Router(config-if)# ip pim sparse-dense-mode Enter the following commands to configure the gigabit ethernet interface connected to the PTP client. Router(config)# interface gigabitethernet 0/5 Router(config-if)# description physical interface to BT-750 client Router(config-if)# switchport access vlan 100 Enter the following command to configure the first gigabit ethernet interface connected to the multicast PTP clock source. Router(config)# interface gigabitethernet 0/0 Router(config-if)# description physical interface to PTP multicast source Router(config-if)# switchport trunk allowed vlan 1,2,401, Router(config-if)# switchport mode trunk Enter the following command to configure the second gigabit ethernet interface connected to the multicast PTP clock source. Router(config)# interface gigabitethernet 0/1 Router(config-if)# description physical interface to PTP multicast source Router(config-if)# switchport trunk allowed vlan 1,2,402, Router(config-if)# switchport mode trunk Use the exit command to exit the gigabitethernet interface. Router(config-if)# exit Router(config)# If you need to statically configure a PIM rendezvous point (RP) for a multicast group, use the ip pim rp-address command in global configuration mode. Router(config)# ip pim rp-address override Use the access-list command to create an access list entry to allow PTP traffic from the router s PTP multicast address. Router(config)# access-list 5 permit Use the exit command to exit configuration mode. Router(config)# exit Router# Use the show ip mroute command to verify your configuration. Router# show ip mroute 4-23

24 Configuration Sequence Chapter 4 To view a sample configuration of multicast/ptp redundancy, see Appendix A, Sample Configurations.. Configuring Network Timing Reference Network Timing Reference (NTR) allows the Cisco MWR 2941-DC to exchange frequency and clocking information over a DSL connection. Follow these steps to configure NTR on the Cisco MWR 2941-DC. The Cisco MWR 2941-DC only supports NTR on SHDSL interfaces; NTR is not supported on ADSL interfaces. Follow these steps to configure the DSL controller. Step 5 Use the controller command to specify an SHDSL controller and enter controller configuration mode. Router(config)# controller SHDSL 1/0 Use the termination cpe command to specify the DSL interface termination mode. Router(config-controller)# termination cpe Use the dsl-group command to specify a DSL group and enter DSL group configuration mode. Router(config-controller)# dsl-group 0 pairs 0,1 Use the shdsl annex command to configure an SHDSL standard for the DSL group. Router(config-controller-dsl-group)# shdsl annex B Use the shdsl ntr enable command to enable NTR on the DSL group. Router(config-controller-dsl-group)# shdsl ntr enable 0, 1 Step 6 Step 7 Step 8 Step 9 0 The shdsl ntr enable command resets the assigned DSL group. Use the shdsl rate command to configure an annex rate for the DSL group. Router(config-controller-dsl-group)# shdsl rate 4608 Exit DSL group configuration mode. Router(config-controller-dsl-group)# exit Router(config-controller)# Exit controller configuration mode. Router(config-controller)# exit Router(config)# Use the network-clock-select hold-timeout command to configure the time that the router waits before reevaluating the network clock entry. Router(config)# network-clock-select hold-timeout 600 Use the network-clock-select hold-timeout command to configure the network clocking mode. Router(config)# network-clock-select mode nonrevert 4-24

25 Chapter 4 Configuration Sequence 1 2 Use the network-clock-select command to enable clocking using the SHDSL interface. You can add multiple entries for clocking interface. Router(config)# network-clock-select 1 SHDSL 1/0.0 Router(config)# network-clock-select 2 SHDSL 1/0.1 Router(config)# network-clock-select 3 E1 0/0 Exit configuration mode. Router(config)# exit Router# Verifying Clock-related Settings Use the following commands to verify the clock settings show network-clocks Displays information about the network clocks show controller Displays the status of the controller, including clocking information. show ptp clock Displays ptp clock information show ptp foreign-master-record Displays PTP foreign master records show ptp parent Displays PTP parent properties show ptp port Displays PTP port properties show ptp time-property Displays PTP clock time properties show interface virtual-cem 0/24 Displays the status of the CEM interface show cem circuit Displays information about the CEM circuit show platform hardware Displays the status of hardware devices on the Cisco MWR 2941-DC. Configuring DSL Backhaul Configuring ADSL Backhaul The following sections describe how to configure a DSL backhaul connection on the Cisco MWR 2941-DC: Configuring ADSL Backhaul Configuring SHDSL Backhaul Configuring a Bridge Virtual Interface Configuring ATM Class of Service (CoS) Configuring PTP over DSL Enter configuration mode. Router# configure terminal Router(config)# Specify the ATM interface that you want to configure using the slot and port numbers. Router(config)# interface atm slot/port 4-25

26 Configuration Sequence Chapter 4 Step 5 Step 6 Assign an IP address to the ADSL ATM interface. router(config-if)# ip address ip-address Use the pvc command to define an ATM PVC and specify a VCI/VPI. This command enters ATM virtual circuit (VC) configuration mode. Router(config-if)# pvc 1/100 Router(cfg-if-atm-l2trans-pvc)# Enable IP connectivity and create a point-to-point IP address for the ATM VC. This step is optional. Router(config-if-vc)# protocol ip ip-address Configure the PVC for real-time variable bit rate (VBR) traffic shaping. This step is optional. Router(config-if-vc)# vbr-rt peak-rate average-rate burst Step 7 Step 8 Step The default traffic shaping type is UBR. Configure the ATM adaptation layer (AAL) and encapsulation type. This step is optional. You can use the following AAL types: aal2 for AAL2 aal5ciscoppp for Cisco PPP over AAL5 aal5mux for AAL5+MUX aal5nlpid for AAL5+NLPID aal5snap for AAL5+LLC/SNAP (default) Router(config-if-vc)# encapsulation {aal2 aal5ciscoppp aal5mux aal5nlpid aal5snap} Exit ATM VC configuration mode. Router(config-if-vc)# exit Configure the ADSL interface to operate one of the following operating modes: ansi-dmt ANSI full rate mode per T1.413 (ITU G dmt Issue 1) auto Automatic detection mode itu-dmt ITU full rate mode (ITU G dmt Issue 1) splitterless G.lite mode per ITU g Router(config-if)# dsl operating-mode {ansi-dmt auto itu-dmt splitterless} Activate the ATM interface. Router(config-if)# no shutdown Exit from ATM interface configuration mode. Router(config-if)# exit Exit from global configuration mode. Router(config)# exit 4-26

27 Chapter 4 Configuration Sequence For instructions on how to configure a pseudowire using an ADSL backhaul, see Configuring Pseudowire, page Configuring SHDSL Backhaul Configuring the SHDSL Controller Follow these steps to configure SHDSL backhaul. Follow these steps to configure an SHDSL controller. You can configure multiple DSL controllers for the HWIC-4SHDSL. Use the controller command to enter DSL controller configuration mode. Specify the controller type and the slot and port of the DSL interface that you want to configure. Router(config)# controller SHDSL 2/0 Router(config-controller)# Use the termination command to configure the router in CPE or CO mode. Router(config-controller)# termination [cpe co] Use the dsl-group command to combine DSL pairs into groups. You can combine the ports on the HWIC-4SHDSL card into 1 or 2 pair DSL groups. You can combine data lines using either inverse multiplexing over ATM (IMA) groups or multi-pair operation (M-pair) groups. For example, with the HWIC-4SHDSL card you use IMA or M-pair groups to combine four lines of data into one or two lines. The following example shows how to combine DSL lines using an M-pair. Router(config-controller)# dsl-group 0 pairs 0, 1 m-pair The following example shows how to combine DSL lines using IMA. Router(config-controller)# dsl-group 0 pairs 0, 1, 2, 3 ima Use the shdsl annex command to defines the define the G standard for the DSL group. You can specify the following annex types: A A-B B F {coding 16 32} F-G {coding 16 32} G {coding 16 32} Router(config-controller)# shdsl annex A If you are using IMA to combine DSL lines, you can only use Annex A or Annex B. If you are using an m-pair group, you can only use Annex A,B,F, or G. For more information about the shdsl annex command, see Appendix B, Cisco MWR 2941-DC Router Command Reference. 4-27

28 Configuration Sequence Chapter 4 Step 5 Use the shdsl rate command to define the line rate for the DSL controller. You can specify a line rate or auto. Router(config-controller)# shdsl rate {number auto} Configuring an ATM Interface For more information about the shdsl rate command, see Appendix B, Cisco MWR 2941-DC Router Command Reference. Follow these steps to configure an ATM interface. You can configure multiple ATM interfaces for the HWIC-4SHDSL. Step 5 Step 6 Step 7 Step 8 Step 9 0 Specify the ATM interface that you want to configure. Router(config)# interface ATM2/0 Router(config-if)# Configure an IP address for the ATM interface. Router(config-if)# ip address Use the load-interval command to specify the length of time used to compute load statistics. Modifying the load-interval settings alter how an interface responds to bursts of traffic including the use of dial backup interfaces. Router(config-if)# load-interval 30 For more information about the load-interval command, see Appendix B, Cisco MWR 2941-DC Router Command Reference. Use the no atm ilmi-keepalive command to disable Interim Local Management Interface (ILMI) keepalives. Router(config-if)# no atm ilmi-keepalive Use the mpls ip command to enable MPLS on the ATM interface. Router(config-if)# mpls ip Use the pvc command to define a PVC and specify a VCI/VPI. Router(config-if)# pvc 4/44 Router(cfg-if-atm-l2trans-pvc)# Use the protocol ip command to enable IP connectivity and create a point-to-point IP address for the virtual circuit. Router(cfg-if-atm-l2trans-pvc)# protocol ip broadcast Use the cbr command to define an ATM constant bit rate for the PVC. Router(cfg-if-atm-l2trans-pvc)# cbr 4500 Use the vc-hold-queue command to configure a per-virtual circuit (VC) hold queue on the ATM adapter. Router(cfg-if-atm-l2trans-pvc)# vc-hold-queue 2048 Use the encapsulation command to specify an encapsulation type for the PVC. You can use the following AAL types: aal2 for AAL2 aal5ciscoppp for Cisco PPP over AAL5 4-28