BIG-IP Advanced Routing Bidirectional Forwarding Detection Configuration Guide. Version 7.8.4

Transcription

1 BIG-IP Advanced Routing Bidirectional Forwarding Detection Configuration Guide Version 7.8.4

2

3 Publication Date This document was published on June 27, Legal Notices Copyright Copyright , F5 Networks, Inc. All rights reserved. F5 Networks, Inc. (F5) believes the information it furnishes to be accurate and reliable. However, F5 assumes no responsibility for the use of this information, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent, copyright, or other intellectual property right of F5 except as specifically described by applicable user licenses. F5 reserves the right to change specifications at any time without notice. Trademarks AAM, Access Policy Manager, Advanced Client Authentication, Advanced Firewall Manager, Advanced Routing, AFM, Alive With F5, APM, Application Acceleration Manager, Application Security Manager, ARX, AskF5, ASM, BIG-IP, BIG-IQ, Cloud Extender, CloudFucious, Cloud Manager, Clustered Multiprocessing, CMP, COHESION, Data Manager, DevCentral, DevCentral [DESIGN], DNS Express, DSC, DSI, Edge Client, Edge Gateway, Edge Portal, ELEVATE, EM, Enterprise Manager, ENGAGE, F5, F5 [DESIGN], F5 Certified [DESIGN], F5 Networks, Fast Application Proxy, Fast Cache, FirePass, Global Traffic Manager, GTM, GUARDIAN, iapps, IBR, Intelligent Browser Referencing, Intelligent Compression, IPv6 Gateway, icontrol, ihealth, iquery, irules, irules OnDemand, isession, L7 Rate Shaping, LC, Link Controller, Local Traffic Manager, LTM, LineRate, LineRate Systems [DESIGN], LROS, Message Security Manager, MSM, OneConnect, Packet Velocity, PEM, Policy Enforcement Manager, Protocol Security Manager, PSM, Real Traffic Policy Builder, ScaleN, Signalling Delivery Controller, SDC, SSL Acceleration, StrongBox, SuperVIP, SYN Check, TCP Express, TDR, TMOS, Traffic Management Operating System, Traffix Systems, Traffix Systems (DESIGN), Transparent Data Reduction, UNITY, VAULT, VIPRION, vcmp, VE F5 [DESIGN], Virtual Clustered Multiprocessing, WA, WAN Optimization Manager, WebAccelerator, WOM, and ZoneRunner, are trademarks or service marks of F5 Networks, Inc., in the U.S. and other countries, and may not be used without F5's express written consent. All other product and company names herein may be trademarks of their respective owners. A portion of this reference guide is copyrighted by IP Infusion, Inc. ZebOS is a registered trademark, and IP Infusion and the ipinfusion logo are trademarks of IP Infusion. All other trademarks are trademarks of their respective companies. This documentation is subject to change without notice. The software described in this document and this documentation are furnished under a license agreement or nondisclosure agreement. The software and documentation may be used or copied only in accordance with the terms of the applicable agreement. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or any means electronic or mechanical, including photocopying and recording for any purpose other than the purchaser's internal use without the written permission of IP Infusion Inc. F5 Networks, Inc. (F5) believes the information it furnishes to be accurate and reliable. However, F5 assumes no responsibility for the use of this information, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent, copyright, or other intellectual property right of F5 except as specifically described by applicable user licenses. F5 reserves the right to change specifications at any time without notice. All other product and company names herein may be trademarks of their respective owners. i

4 ii

5 Table of Contents CHAPTER 1 Base BFD Configuration BFD Base Configuration Topology CHAPTER 2 BFD Protocol Configurations OSPF BFD Single Hop Session Topology OSPF BFD Multi-hop Session Topology BFD Configuration in IS-IS Topology BFD Configuration in BGP Topology CHAPTER 3 BFD Static Route Configuration Topology CHAPTER 4 BFD for MPLS LSP Overview Benefits Configure BFD for LDP LSP Configure BFD for RSVP LSP Configure BFD for Static LSP Configure BFD for Static LSP with Explicit Null Disable BFD for MPLS LSP Remove BFD for MPLS LSP iii

6 Table of Contents iv

7 CHAPTER 1 Base BFD Configuration The steps in this chapter are used to configure the base BFD functions. BFD Base Configuration Basic BFD functions that can be configured include echo, slow timer, multihop peer timer, single-hop session timer, and echo interval. Topology Figure 1 contains a basic topology for BFD in ZebOS. BFD Echo Function ZebOS#configure terminal ZebOS(config)# bfd echo Figure 1: Basic Topology of Three Routers Enable BFD echo mode. BFD Slow Timer ZebOS#configure terminal ZebOS(config)# bfd slow-timer 1000 Configure BFD slow-timer in milliseconds. BFD Multihop Peer Timer ZebOS#configure terminal ZebOS(config)# bfd multihop-peer interval 100 minrx 100 multiplier 3 Configure BFD multihop-peer timer and reception intervals in milliseconds, and the Hello multiplier. BFD Single-hop Session Timer ZebOS#configure terminal ZebOS(config)# interface eth1 ZebOS(config-if)# bfd interval 100 minrx 100 multiplier 4 Enter the Interface mode. Configure BFD single-hop sessions timer and reception interval in millisecond, and the Hello multiplier. BFD Echo Interval ZebOS#configure terminal ZebOS(config)# interface eth1 ZebOS(config-if)# bfd echo interval 100 Enter the Interface mode. Configure BFD echo interval in milliseconds. 1

8 Base BFD Configuration 2

9 CHAPTER 2 BFD Protocol Configurations The tables in this chapter contain the steps to configure Bidirectional Forwarding Detection for several ZebOS protocols. OSPF BFD Single Hop Session Follow the steps in the tables below to configure BFD for Single-Hop OSPF. Topology Figure 2 depicts a single-hop topology for OSPF. R1 Figure 2: Single-Hop OSPF Topology ZebOS#configure terminal ZebOS(config)# router ospf 100 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 ZebOS(config-router)#bfd all-interfaces Enter Router mode for OSPF. Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. Enable BFD for all neighbors. R2 ZebOS#configure terminal ZebOS(config)# router ospf 100 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 ZebOS(config-router)#bfd all-interfaces Enter Router mode for OSPF. Advertise network /24 in OSPF area 1. Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. Enable BFD for all neighbors. R3 ZebOS#configure terminal ZebOS(config)# router ospf 100 Enter Router mode for OSPF. 3

10 BFD Protocol Configurations ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 ZebOS(config-router)#bfd all-interfaces Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. Enable BFD for all neighbors Validation ZebOS#show bfd session The example that follows is the output of the command. ZebOS#show bfd session Session Interface Index : 3 Session Index: 1 Lower Layer: IPv4 Single Hop Session State : Up Local Discriminator : 1 Remote Discriminator: 1 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Timers in Milliseconds Min Tx: 20 Min Rx: 20 Multiplier: 5 UP Count: 1 UPTIME: 00:14:12 Session Interface Index : 4 Session Index: 4 Lower Layer: IPv4 Single Hop Session State : Up Local Discriminator : 4 Remote Discriminator: 4 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Timers in Milliseconds Min Tx: 20 Min Rx: 20 Multiplier: 5 UP Count: 1 UPTIME: 00:01:12 Number of Sessions: 2 4

11 BFD Protocol Configurations OSPF BFD Multi-hop Session Follow the steps in the tables below to configure BFD for OSPF multi-hop sessions. Topology Figure 3 depicts an example of a multi-hop OSPF topology. R1 Figure 3: Multi-hop OSPF Topology ZebOS#configure terminal ZebOS(config)# router ospf 100 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 ZebOS(config-router)#network /24 area 0 ZebOS(config-router)# area 1 virtual-link fall-over bfd Enter Router mode for OSPF. Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. Advertise network /24 in OSPF area 0. Create a virtual link to R3 with BFD. R2 ZebOS#configure terminal ZebOS(config)# router ospf 100 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 Enter the Configure mode Enter Router mode for OSPF. Advertise network /24 in OSPF area 1. Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. R ZebOS#configure terminal ZebOS(config)# router ospf 100 Enter configure mode Enter Router mode for OSPF. 5

12 BFD Protocol Configurations ZebOS(config-router)#network /24 area 1 ZebOS(config-router)#network /32 area 1 ZebOS(config-router)# area 1 virtual-link fall-over bfd Advertise network /24 in OSPF area 1. Advertise loopback to network /32 in OSPF area 1. Create a virtual link to R1 with BFD. Validation ZebOS#show bfd session The example that follows is the output of the command. Session Interface Index : 0 Session Index: 2 Lower Layer: IPv4 Multihop Arbit Path Session State : Up Local Discriminator : 2 Remote Discriminator: 1 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 4784 Timers in Milliseconds Min Tx: 2 Min Rx: 20 Multiplier: 5 UP Count: 1 UPTIME: 00:03:58 Number of Sessions: 1 6

13 BFD Protocol Configurations BFD Configuration in IS-IS Follow the steps in the tables below to configure BFD for the IS-IS protocol. Topology Figure 4 depicts a basic topology for BFD-ISIS. R1 Figure 4: Basic Topology for BFD-ISIS ZebOS#configure terminal ZebOS(config)# router isis ZebOS(config-router)#net ZebOS(config-router)#bfd all-interface Enter the Configure mode Enter Router mode for IS-IS.. Advertise network in IS-IS. Enable BFD for all neighbors. R2 ZebOS#configure terminal ZebOS(config)# router isis ZebOS(config-router)#net ZebOS(config-router)#bfd all-interface Enter Router mode for IS-IS. Advertise network in IS-IS. Enable BFD for all neighbors. 7

14 BFD Protocol Configurations BFD Configuration in BGP Follow the steps in the tables below to configure BFD for BGP Topology Figure 5 depicts a basic topology for BFD in BGP. R1 Figure 5: Basic Topology for BFD in BGP ZebOS#configure terminal ZebOS(config)# router bgp 100 ZebOS(config-router)#neighbor remote-as 100 ZebOS(config-router)# neighbor fallover bfd multihop Enter Router mode for BGP. Add the neighbor /32 to remote-as 100. Enable the BFD option for the neighbor. R2 ZebOS#configure terminal ZebOS(config)# router bgp 100 ZebOS(config-router)#neighbor remote-as 100 ZebOS(config-router)# neighbor fallover bfd multihop Enter Router mode for BGP/ Add the neighbor to remote-as 100. Enable the BFD option for the neighbor. R3 ZebOS#configure terminal ZebOS(config)# router bgp 100 ZebOS(config)# router bgp 100 ZebOS(config-router)# neighbor remote-as 100 ZebOS(config-router)# neighbor fallover bfd multihop Enter Router mode for BGP. Configure BGP Add the neighbor to remote-as 100. Enable the BFD option for the neighbor. 8

15 CHAPTER 3 BFD Static Route Configuration It is extremely important to quickly detect any changes to static route validity, in order to establish alternate paths to these destinations with the least possible delay. Bidirectional Forwarding Detection is a faster mechanism to detect the liveliness of a static route next-hop. Static routes use the next-hop reachability information provided by BFD to determine whether routes are valid. Using the BFD protocol to reach the static route next-hop also ensures that a static route is inserted in the forwarding database only when the next-hop neighbor is reachable. Topology Figure 6 depicts a basic topology for BFD static routes. Follow the steps in the tables that follow the figure to complete the configurations. R2 Figure 6: BFD Static Route Basic Topology ZebOS# configure terminal ZebOS(config)# ip router / ZebOS(config)# ip bfd static all-interfaces ZebOS(config)# interface eth1 ZebOS(config-if)# ip static bfd ZebOS(config-if)# exit ZebOS(config)# ip static / fall-over bfd R3 Configure static route. Enable BFD for all static routes. Enter the Interface configuration mode for eth1. Enable static BFD on interface level. Exit Interface configuration mode. Enable static BFD at static route level. ZebOS# configure terminal ZebOS(config)# ip route / Configure static route. ZebOS(config)# ip bfd static all-interfaces Enable BFD for all static routes. 9

16 BFD Static Route Configuration ZebOS(config)# int eth1 ZebOS(config-if)# ip static bfd ZebOS(config-if)# exit ZebOS(config)# ip static / fall-over bfd Enter the Interface configuration mode for eth1. Enable static BFD at interface level. Exit Interface configuration mode. Enable static BFD at static route level. Validation Enter the commands listed in the following sections to confirm the configurations. Verify Traffic Class Groups Configuration Show IP Route ZebOS# show ip route Codes: K - kernel, C - connected, S - static, R - RIP, B - BGP O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default Gateway of last resort is to network K* /0 via , eth0 S /24 [1/0] via , eth2 C /24 is directly connected, eth3 C /24 is directly connected, eth1 C /24 is directly connected, eth2 K /24 via , eth0 K /24 via , eth0 C /24 is directly connected, eth0 C /8 is directly connected, lo C /32 is directly connected, lo K /16 is directly connected, eth0 ZebOS# Show BFD Session ZebOS# show bfd session Session Interface Index: 1 Session Index: 1 Lower Layer: IPv4 Single Hop Session State: Up Local Discriminator: 1 Remote Discriminator: 1 Local Address: /32 Remote Address: /32 Local Port: Remote Port: 3784 Timers in Milliseconds Min Tx: 20 Min Rx: 20 Multiplier: 5 UP Count: 1 UPTIME: 00:07:55 Bfd GTSM Disabled 10

17 BFD Static Route Configuration Number of Sessions: 1 Show BFD Session Detail ZebOS# show bfd session detail Session Interface Index: 5 Session Index: 1 Lower Layer: IPv4 Version: 1 Session Type: Single Hop Session State: Up Local Discriminator: 1 Remote Discriminator: 1 Local Address: /32 Remote Address: /32 Local Port: Remote Port: 3784 Options: Diagnostics: None Timers in Milliseconds Min Tx: 20 Min Rx: 20 Multiplier: 5 Min echo Tx: 20 Min echo Rx: 10 Neg Tx: 20 Neg echo intrvl: 0 Neg detect mult: 5 Storage type: 2 Last sess down time: 00:00:00 Sess discontinue time: 00:00:00 Counters values: Pkt In Pkt Out Echo Out IPv6 Pkt In IPv6 Pkt Out IPv6 Echo Out UP Count: 1 UPTIME: 00:09:37 NSM-> Client ID: 1 Flags: 4 Number of Sessions: 1 11

18 BFD Static Route Configuration 12

19 CHAPTER 4 BFD for MPLS LSP Bidirectional Forwarding Detection is used to track liveliness for a Multi Protocol Label Switched (MPLS) Label Switched Path (LSP). BFD can be used to detect a data plane failure in the forwarding path of an MPLS LSP. This chapter contains the configurations applicable to BFD for LSP-Ping to detect MPLS LSP data plane failures. Overview If an MPLS LSP fails to deliver data traffic, BFD detects the failure using the MPLS control plane. For instance, the control plane of an MPLS LSP may be functional, whereas the data plane may be incorrectly forwarding or dropping data. This is an example of the need for a mechanism to detect a data plane failure in an MPLS LSP path. BFD cannot be used to verify the MPLS control plane against the data plane. However, BFD can be used to detect a data plane failure in the forwarding path of an MPLS LSP. LSP-Ping is a mechanism for detecting MPLS LSP data plane failures and verifying the MPLS LSP data plane against the control plane. Verification can take place provided that the LSP is mapped to the same Forwarding Equivalence Class (FEC) at the ingress as at the egress. LSP-Ping has extensive control-plane verification features, whereas BFD is designed as a light-weight method of testing only the data plane. As a result, LSP-Ping is more expansive than BFD for detecting MPLS LSP data plane faults. BFD is also more suitable for implementation in hardware or firmware due to its fixed-packet format. Note: Basic OSPF configurations are required for MPLS LSPs, except for static LSPs. Benefits Using BFD for detecting MPLS LSP data-plane faults has the following advantages: Support for fault detection for a higher number of LSPs Detection with sub-second granularity LSP-Ping is used in an environment where fault-detection messages are exchanged, either for diagnostic purposes or for infrequent periodic fault detection. The exchange rate is in the order of tens of seconds or minutes; therefore LSP- Ping is not suitable for fast detection. However, BFD is designed for sub-second fault detection intervals. 13

20 BFD for MPLS LSP Configure BFD for LDP LSP Follow the steps in the tables below to configure BFD for LDP label switched paths. PE1 Figure 7: BFD for LDP LSP ZebOS# configure terminal ZebOS(config)# router ldp ZebOS(config-router)# targeted-peer ipv ZebOS(config-router)# exit ZebOS(config)# interface eth2 ZebOS(config-if)# label-switching ZebOS(config-if)# enable-ldp ipv4 ZebOS(config-if)# exit ZebOS(config)# mpls bfd ldp all forceexplicit-null lsp-ping-intvl 10 min-rx 300 min-tx 300 multiplier 2 ZebOS(config)# mpls bfd ldp all lsp-pingintvl 10 min-rx 300 min-tx 300 multiplier 2 P Enter the Router LDP mode. Configure targeted LDP peer to the PE2 loopback address. Exit the Router LDP mode and return to Configure mode. Enter the Interface mode for eth2. Configure label-switching on the provider interface of PE1. Enable LDP on the provider interface of PE1. Exit the Interface mode and return to Configure mode. Configure BFD session for all LDP FEC entries. Note: BFD can be enabled for particular FEC. Configure BFD session for all LDP FEC entries. Note: If explicit-null is enabled on egress router then forceexplicit-null should not be configured in MPLS BFD configuration. ZebOS# configure terminal ZebOS(config)# router ldp ZebOS(config-router)# exit ZebOS(config)# interface eth1 ZebOS(config-if)# label-switching ZebOS(config-if)# enable-ldp ipv4 ZebOS(config-if)# exit ZebOS(config)# interface eth2 ZebOS(config-if)# label-switching Enter the Router LDP mode. Exit the Router LDP mode and return to Configure mode. Enter the Interface mode for eth1. Configure label-switching. Enable LDP. Exit the Interface mode and return to Configure mode. Enter the Interface mode for eth2. Configure label-switching. 14

21 BFD for MPLS LSP ZebOS(config-if)# enable-ldp ipv4 ZebOS(config-if)# exit PE2 Enable LDP. Exit the Interface mode and return to Configure mode. ZebOS# configure terminal ZebOS(config)# router ldp ZebOS(config-router)# targeted-peer ipv ZebOS(config-router)# exit ZebOS(config)# interface eth1 ZebOS(config-if)# label-switching ZebOS(config-if)# enable-ldp ipv4 ZebOS(config-if)# exit Enter the Router LDP mode. Configure targeted LDP peer to PE2 loopback address. Exit the Router LDP mode and return to Configure mode. Enter the Interface mode for eth1. Configure label-switching on provider interface of PE2. Enable LDP on the provider interface of PE2. Exit the Interface mode and return to Configure mode. Configure BFD for RSVP LSP Follow the steps in the tables below to configure BFD for RSVP label switched paths. PE1 Figure 8: BFD for RSVP LSP Topology ZebOS# configure terminal ZebOS(config)# mpls class-type ct0 default ZebOS(config)# mpls te-class te0 default 0 ZebOS(config)# mpls te-class te1 default 1 ZebOS(config)# mpls te-class te2 default 2 ZebOS(config)# mpls te-class te3 default 3 ZebOS(config)# mpls te-class te4 default 4 ZebOS(config)# mpls te-class te5 default 5 ZebOS(config)# mpls te-class te6 default 6 ZebOS(config)# mpls te-class te7 default 7 ZebOS(config)# router rsvp ZebOS(config-router)# exit Configure default class type. Configure default te-class for te0. Configure default te-class for te1. Configure default te-class for te2. Configure default te-class for te3. Configure default te-class for te4. Configure default te-class for te5. Configure default te-class for te6. Configure default te-class for te7. Enter the Router RSVP mode. Exit the Router RSVP mode and return to Configure mode. 15

22 BFD for MPLS LSP ZebOS(config)# interface eth2 ZebOS(config-if)# label-switching ZebOS(config-if)# bandwidth 100m ZebOS(config-if)# reservable-bandwidth 100m ZebOS(config-if)# enable-rsvp ZebOS(config-if)# exit P Enter the Interface mode for eth2. Configure label-switching on eth2. Configure bandwidth on eth2. Configure reservable bandwidth on eth2. Enable RSVP on the eth2. ZebOS(config)# rsvp-trunk t1 ipv4 Configure RSVP trunk t1. ZebOS(config-trunk)# to ZebOS(config)# mpls bfd rsvp mpls bfd rsvp tunnel-name t1 force-explicit-null lsp-pingintvl 10 min-rx 300 min-tx 300 multiplier 2 ZebOS(config)# mpls bfd rsvp mpls bfd rsvp tunnel-name t1 lsp-ping-intvl 10 min-rx 300 min-tx 300 multiplier 2 Exit the Interface mode and return to Configure mode. Configure an egress router address in RSVP trunk. Configure BFD session for RSVP trunk t1. Configure BFD session for RSVP trunk t1. Note: If explicit-null is enabled on egress router, then force-explicit-null should not be configured. ZebOS# configure terminal ZebOS(config)# mpls class-type ct0 default ZebOS(config)# mpls te-class te0 default 0 ZebOS(config)# mpls te-class te1 default 1 ZebOS(config)# mpls te-class te2 default 2 ZebOS(config)# mpls te-class te3 default 3 ZebOS(config)# mpls te-class te4 default 4 ZebOS(config)# mpls te-class te5 default 5 ZebOS(config)# mpls te-class te6 default 6 ZebOS(config)# mpls te-class te7 default 7 ZebOS(config)# router rsvp ZebOS(config-router)# exit ZebOS(config)# interface eth1 ZebOS(config-if)# label-switching ZebOS(config-if)# bandwidth 100m ZebOS(config-if)# reservable-bandwidth 100m ZebOS(config-if)# enable-rsvp ZebOS(config-if)# exit ZebOS(config)# interface eth2 ZebOS(config-if)# label-switching ZebOS(config-if)# bandwidth 100m ZebOS(config-if)# reservable-bandwidth 100m ZebOS(config-if)# enable-rsvp ZebOS(config-if)# exit ZebOS(config)# exit Configure default class type. Configure default te-class for te0. Configure default te-class for te1. Configure default te-class for te2. Configure default te-class for te3. Configure default te-class for te4. Configure default te-class for te5. Configure default te-class for te6. Configure default te-class for te7. Enter the Router RSVP mode. Exit the Router RSVP mode and return to Configure mode. Enter the Interface mode for eth1. Configure label-switching on eth1. Configure bandwidth on eth1. Configure reservable bandwidth on eth1. Enable RSVP on the eth1. Exit the Interface mode and return to Configure mode. Enter the Interface mode for eth2. Configure label-switching on eth2. Configure bandwidth on eth2. Configure reservable bandwidth on eth2. Enable RSVP on the eth2. Exit the Interface mode and return to Configure mode. Exit the Configure mode. 16

23 BFD for MPLS LSP Configuration for PE2 ZebOS# configure terminal ZebOS(config)# mpls class-type ct0 default ZebOS(config)# mpls te-class te0 default 0 ZebOS(config)# mpls te-class te1 default 1 ZebOS(config)# mpls te-class te2 default 2 ZebOS(config)# mpls te-class te3 default 3 ZebOS(config)# mpls te-class te4 default 4 ZebOS(config)# mpls te-class te5 default 5 ZebOS(config)# mpls te-class te6 default 6 ZebOS(config)# mpls te-class te7 default 7 ZebOS(config)# router rsvp ZebOS(config-router)# exit ZebOS(config)# interface eth1 ZebOS(config-if)# label-switching ZebOS(config-if)# bandwidth 100m ZebOS(config-if)# reservable-bandwidth 100m ZebOS(config-if)# enable-rsvp ZebOS(config-if)# exit Configure default class type. Configure default te-class for te0. Configure default te-class for te1. Configure default te-class for te2. Configure default te-class for te3. Configure default te-class for te4. Configure default te-class for te5. Configure default te-class for te6. Configure default te-class for te7. Enter the Router RSVP mode. Exit the Router RSVP mode and return to Configure mode. Enter the Interface mode for eth1. Configure label-switching on eth1. Configure bandwidth on eth1. Configure reservable bandwidth on eth1. Enable RSVP on the eth1. Exit the Interface mode and return to Configure mode. Validation Enter the following commands: show bfd session show bfd session detail show mpls forwarding-table Verify BFD Session for RSVP LSP PE1# show mpls forwarding-table Codes: > - selected FTN, p - stale FTN, B - BGP FTN, K - CLI FTN,L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut, U - unknown FTN Code FEC Tunnel-id FTN-ID Pri Nexthop Out-Label Out-Intf LSP-Type L> / Yes eth2 LSP_DEFAULT R> / Yes eth2 LSP_DEFAULT L / Yes eth2 LSP_DEFAULT L> / Yes eth2 LSP_DEFAULT PE1# show bfd session Session Interface Index : 3 Session Index: 2 Lower Layer: MPLS LSP Single Hop Session State : Up Local Discriminator: 2 Remote Discriminator: 2 LSP Owner: RSVP FTN Ix: 4 Tunnel Name: t1 17

24 BFD for MPLS LSP LSP Ping Interval in seconds: 10 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 UP Count: 0 UPTIME: 00:00:00 Bfd GTSM Disabled Number of Sessions: 1 PE1# show bfd session detail Session Interface Index : 3 Session Index: 2 Lower Layer: MPLS LSP Version : 1 Session Type: Single Hop Session State : Up Local Discriminator : 2 Remote Discriminator: 2 LSP Owner: RSVP FTN Ix: 4 Tunnel Name: t1 LSP Ping Interval in seconds: 10 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Options : Diagnostics: None Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 Min echo Tx: 0 Min echo Rx: 0 Neg Tx: 300 Neg echo intrvl: 0 Neg detect mult: 5 Storage type: 2 Sess down time: 00:00:00 Sess discontinue time: 00:00:00 Counters values: Pkt In Pkt Out Echo Out IPv6 Pkt In IPv6 Pkt Out IPv6 Echo Out UP Count: 1 UPTIME: 00:00:07 NSM-> Client ID: 1 Flags: 4 Number of Sessions: 1 18

25 BFD for MPLS LSP Configure BFD for Static LSP Configuration for PE1 Figure 9: BFD for Static LSP Topology ZebOS# configure terminal ZebOS(config)# mpls ftn-entry tunnel-id / eth2 primary ZebOS(config)# mpls bfd static /32 force-explicit-null lsp-ping-intvl 10 min-rx 300 min-tx 300 multiplier 2 ZebOS(config)# exit Configure MPLS FTN entry for static LSP. Configures BFD session for static LSP. Exit the Configure mode. Configuration on Router P ZebOS# configure terminal ZebOS(config)# mpls ilm-entry 100 eth1 swap 3 eth /32 ZebOS(config)# exit Configure MPLS FTN entry for static LSP. Exit the Configure mode. Validation Enter the following commands: show bfd session show bfd session detail show mpls forwarding-table Verify BFD Session for LDP LSP PE1# show mpls forwarding-table Codes: > - selected FTN, p - stale FTN, B - BGP FTN, K - CLI FTN,L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut, U - unknown FTN Code FEC Tunnel-id FTN-ID Pri Nexthop Out-Label Out-Intf LSP-Type L> / Yes eth2 LSP_DEFAULT L> / Yes eth2 LSP_DEFAULT L> / Yes eth2 LSP_DEFAULT PE1# show bfd session 19

26 BFD for MPLS LSP Session Interface Index: 3 Session Index: 1 Lower Layer: MPLS LSP Single Hop Session State: Up Local Discriminator: 1 Remote Discriminator: 1 LSP Owner: LDP FTN Ix: 2 FEC: /32 LSP Ping Interval in seconds: 10 Local Address: /32 Remote Address: /32 Local Port: Remote Port: 3784 Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 UP Count: 1 UPTIME: 00:00:22 Bfd GTSM Disabled Number of Sessions: 1 PE1# show bfd session detail Session Interface Index: 3 Session Index: 1 Lower Layer: MPLS LSP Version: 1 Session Type: Single Hop Session State: Up Local Discriminator: 1 Remote Discriminator: 1 LSP Owner: LDP FTN Ix: 2 FEC: /32 LSP Ping Interval in seconds: 10 Local Address: /32 Remote Address: /32 Local Port: Remote Port: 3784 Options: Diagnostics: None Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 Min echo Tx: 0 Min echo Rx: 0 Neg Tx: 300 Neg echo intrvl: 0 Neg detect mult: 5 Storage type: 2 Sess down time: 00:00:00 Sess discontinue time: 00:00:00 Counters values: Pkt In d Pkt Out Echo Out IPv6 Pkt In IPv6 Pkt Out IPv6 Echo Out UP Count: 1 UPTIME: 00:00:25 NSM-> Client ID: 1 Flags: 4 Number of Sessions: 1 20

27 BFD for MPLS LSP Configure BFD for Static LSP with Explicit Null Configuration for PE1 Figure 10: Static LSP BFD with Explicit Null ZebOS# configure terminal ZebOS(config)# mpls ftn-entry tunnel-id / eth2 primary ZebOS(config)# mpls bfd static /32 lsp-ping-intvl 10 min-rx 300 min-tx 300 multiplier 2 ZebOS(config)# exit Configure MPLS FTN entry for static LSP. Configures BFD session for static LSP. Exit the Configure mode. Configuration for P ZebOS# configure terminal ZebOS(config)# mpls ilm-entry 100 eth1 swap 0 eth /32 ZebOS(config)# exit Configure MPLS ILM entry for static LSP. Exit the Configure mode. Validation Enter the following commands: show bfd session show bfd session detail show mpls forwarding-table Verify BFD Session for Static LSP PE1# show mpls forwarding-table Codes: > - selected FTN, p - stale FTN, B - BGP FTN, K - CLI FTN,L - LDP FTN, R - RSVP-TE FTN, S - SNMP FTN, I - IGP-Shortcut,U - unknown FTN Code FEC Tunnel-id FTN-ID Pri Nexthop Out-Label Out-Intf LSP-Type L> / Yes eth2 LSP_DEFAULT K> / Yes eth2 LSP_DEFAULT R / Yes eth2 LSP_DEFAULT 21

28 BFD for MPLS LSP L / Yes eth2 LSP_DEFAULT L> / Yes eth2 LSP_DEFAULT PE1# show bfd session Session Interface Index : 3 Session Index: 3 Lower Layer: MPLS LSP Single Hop Session State : Up Local Discriminator : 3 Remote Discriminator: 3 LSP Owner: Static FTN Ix: 5 FEC: /32 LSP Ping Interval in seconds: 10 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 UP Count: 1 UPTIME: 00:00:37 Bfd GTSM Disabled Number of Sessions: 1 PE1# show bfd session detail Session Interface Index : 3 Session Index: 3 Lower Layer: MPLS LSP Version : 1 Session Type: Single Hop Session State : Up Local Discriminator : 3 Remote Discriminator: 3 LSP Owner: Static FTN Ix: 5 FEC: /32 LSP Ping Interval in seconds: 10 Local Address : /32 Remote Address: /32 Local Port : Remote Port: 3784 Options : Diagnostics: None Timers in Milliseconds Min Tx: 300 Min Rx: 300 Multiplier: 2 Min echo Tx: 0 Min echo Rx: 0 Neg Tx: 300 Neg echo intrvl: 0 Neg detect mult: 5 Storage type: 2 Sess down time: 00:00:00 Sess discontinue time: 00:00:00 Counters values: Pkt In Pkt Out Echo Out IPv6 Pkt In IPv6 Pkt Out IPv6 Echo Out UP Count: 1 UPTIME: 00:00:42 NSM-> Client ID: 1 Flags: 4 Number of Sessions: 1 wqa12# 22

29 BFD for MPLS LSP Disable BFD for MPLS LSP Configuration for PE1 ZebOS# configure terminal ZebOS(config)# mpls bfd static /32 disable ZebOS(config)# mpls bfd rsvp tunnel-name t1 disable ZebOS(config)# mpls bfd ldp /32 disable ZebOS(config)# exit Disable BFD for static LSP. Disable BFD for RSVP LSP. Disable BFD for LDP LSP. Exit the Configure mode. Remove BFD for MPLS LSP Referring to the same basic topology, follow the steps in the table below to remove BFD for MPLS LSP. Configuration for PE1 ZebOS# configure terminal ZebOS(config)# no mpls bfd static all ZebOS(config)# no mpls bfd ldp all ZebOS(config)# no mpls bfd rsvp all ZebOS(config)# exit Unconfigure BFD for all Static LSPs. Unconfigure BFD for all LDP LSPs. Unconfigure BFD for all RSVP LSPs. Exit the Configure mode. 23

30 BFD for MPLS LSP 24

31 Index Index B BFD Configuration 1 Echo Function 1 Echo Interval 1 Multi-hop Peer Timer 1 Single-hop Session Timer 1 Slow Timer 1 Topology 1 BFD for LDP LSP 14 BFD for MPLS LSPs 13 BFD for RSVP LSP 15 BFD for Static LSP 19 BFD for Static LSP with Explicit Null 21 BFD Protocol Configurations 3 BFD Static Configurations 9 Topology 9 C Configuration BFD Configuration in IS-IS 7 OSPF BFD Multi-hop Session 5 OSPF BFD Single Hop Session 3 R Remove MPLS LSPs BFD 23 Index - 1

32 Index Index - 2