1. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-1 Frame-Mode MPLS Implementation on Cisco IOS Platforms Monitoring Frame-Mode MPLS on Cisco IOS Platforms

2. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-2 Outline Overview Monitoring MPLS Monitoring LDP Monitoring Label Switching Debugging MPLS and LDP Summary

3. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-3 show mpls ldp parameters Router# Displays LDP parameters on the local router MPLS Monitoring Commands show mpls interfaces Router# Displays MPLS status on individual interfaces show mpls ldp discovery Router# Displays all discovered LDP neighbors

4. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-4 Protocol version: 1 Downstream label pool: min label: 16; max label: 100000 [Configured: min label: 1000; max label: 1999] Session hold time: 180 sec; keep alive interval: 60 sec Discovery hello: holdtime: 15 sec; interval: 5 sec Discovery targeted hello: holdtime: 180 sec; interval: 5 sec Downstream on Demand max hop count: 255 LDP for targeted sessions LDP initial/maximum backoff: 15/120 sec LDP loop detection: off Router#show mpls ldp parameters MPLS Monitoring Commands: show mpls ldp parameters

5. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-5 Router#show mpls interfaces Interface Serial0/0: IP labeling enabled (ldp) LSP Tunnel labeling enabled Tag Frame Relay Transport tagging not enabled Tagging operational Fast Switching Vectors: IP to MPLS Fast Switching Vector MPLS Turbo Vector MTU = 1500 Interface Serial0/3: IP labeling enabled (ldp) LSP Tunnel labeling not enabled Tag Frame Relay Transport tagging not enabled Tagging operational Fast Switching Vectors: IP to MPLS Fast Feature Switching Vector MPLS Feature Vector MTU = 1500 MPLS Monitoring Commands: show mpls interfaces

6. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-6 MPLS Monitoring Commands: show mpls ldp discovery Router#show mpls ldp discovery Local LDP Identifier: 192.168.3.102:0 Discovery Sources: Interfaces: Serial1/0.1(ldp): xmit/recv LDP Id: 192.168.3.101:0 Serial1/0.2(ldp): xmit/recv LDP Id: 192.168.3.100:0

7. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-7 show mpls ldp neighbor Router# Displays individual LDP neighbors LDP Monitoring Commands show mpls ldp neighbor detail Router# Displays more details about LDP neighbors show mpls ldp bindings Router# Displays LIB show mpls ldp bindings [network {mask | length} [longer-prefixes]] [local-label label [- label]} [remote-label label [- label] [neighbor address] [local]

8. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-8 LDP Monitoring Commands: show mpls ldp neighbor detail Router#show mpls ldp neighbor detail Peer LDP Ident: 192.168.3.100:0; Local LDP Ident 192.168.3.102:0 TCP connection: 192.168.3.100.646 – 192.168.3.102.11000 State: Oper; Msgs sent/rcvd: 3117/3112; Downstream; Last TIB rev sent2 Up time: 2w4d; UID: 4; Peer Id 0; LDP discovery sources: Serial0/0; Src IP addr: 130.0.0.2 holdtime: 15000 ms, hello interval: 5000 ms Addresses bound to peer LDP Ident: 192.168.3.10 192.168.3.14 192.168.3.100 Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab

9. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-9 LDP Monitoring Commands: show mpls ldp bindings Router#show mpls ldp bindings tib entry: 10.102.0.0/16, rev 29 local binding: label: 26 remote binding: lsr: 172.27.32.29:0, label: 26 tib entry: 10.211.0.7/32, rev 32 local binding: label: 27 remote binding: lsr: 172.27.32.29:0, label: 28 tib entry: 10.220.0.7/32, rev 33 local binding: label: 28 remote binding: lsr: 172.27.32.29:0, label: 29

10. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-10 show mpls forwarding-table Router# Displays contents of LFIB Monitoring Label Switching show ip cef detail Router# Displays label or labels attached to a packet during label imposition on edge LSR

11. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-11 Monitoring Label Switching: show mpls forwarding-table Router#show mpls forwarding-table ? A.B.C.D Destination prefix detail Detailed information interface Match outgoing interface labels Match label values lsp-tunnel LSP Tunnel id next-hop Match next hop neighbor vrf Show entries for a VPN Routing/Forwarding instance | Output modifiers

12. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-12 Monitoring Label Switching: show mpls forwarding-table detail Router#show mpls forwarding-table detail Local Outgoing Prefix Bytes tag Outgoing Next Hop tag tag or VC or Tunnel Id switched interface 70 Pop tag 192.168.3.3/32 0 Se0/0.111 point2point MAC/Encaps=4/4, MTU=1504, Tag Stack{} 18F18847 No output feature configured Per-packet load-sharing 71 Pop tag 192.168.3.4/32 0 Se0/0.111 point2point MAC/Encaps=4/4, MTU=1504, Tag Stack{} 18F18847 No output feature configured Per-packet load-sharing 72 16 192.168.1.97/32 0 Se0/0.111 point2point MAC/Encaps=4/8, MTU=1500, Tag Stack{16} 18F18847 00010000 No output feature configured Per-packet load-sharing

13. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-13 Monitoring Label Switching: show ip cef detail Router#show ip cef 192.168.20.0 detail 192.168.20.0/24, version 23, cached adjacency to Serial1/0.2 0 packets, 0 bytes tag information set local tag: 33 tag rewrite with Se1/0.2, point2point, tags imposed: {32} via 192.168.3.10, Serial1/0.2, 0 dependencies next hop 192.168.3.10, Serial1/0.2 valid adjacency tag rewrite with Se1/0.2, point2point, tags imposed: {32}

14. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-14 debug mpls ldp... Router# Debugs TDP adjacencies, session establishment, and label bindings exchange Debugging MPLS and LDP debug mpls lfib … Router# Debugs LFIB events: label creations, removals, rewrite, and so on debug mpls packets [interface] Router# Debugs labeled packets switched by the router

15. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-15 Summary The show mpls interfaces command will show only those interfaces that have had mpls enabled. Use the show mpls ldp bindings command to display the LIB table. Use the show mpls forwarding-table command to display the LFIB table. Use the debug mpls packets command with care because it causes fast and distributed switching to be disabled.

16. © 2006 Cisco Systems, Inc. All rights reserved. MPLS v2.2—3-16