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Frame-Mode MPLS Implementation on Cisco IOS Platforms

Frame-Mode MPLS Implementation on Cisco IOS Platforms. Monitoring Frame-Mode MPLS on Cisco IOS Platforms. Outline. Overview Monitoring MPLS Monitoring LDP Monitoring Label Switching Debugging MPLS and LDP Summary. MPLS Monitoring Commands. Router#. show mpls ldp parameters.

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Frame-Mode MPLS Implementation on Cisco IOS Platforms

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  1. Frame-Mode MPLS Implementation on Cisco IOS Platforms Monitoring Frame-Mode MPLS on Cisco IOS Platforms

  2. Outline • Overview • Monitoring MPLS • Monitoring LDP • Monitoring Label Switching • Debugging MPLS and LDP • Summary

  3. MPLS Monitoring Commands Router# show mpls ldp parameters • DisplaysLDP parameters on the local router Router# show mpls interfaces • Displays MPLS status on individual interfaces Router# show mpls ldp discovery • Displays all discovered LDP neighbors

  4. MPLS Monitoring Commands:show mplsldp parameters 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

  5. MPLS Monitoring Commands: show mpls interfaces 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

  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. LDP Monitoring Commands Router# show mpls ldp neighbor • Displaysindividual LDP neighbors Router# show mpls ldp neighbor detail • Displays more details about LDP neighbors Router# show mpls ldp bindings • Displays LIB • show mpls ldp bindings [network{mask | length} [longer-prefixes]] [local-label label  [- label]} [remote-label label [- label] [neighbor address] [local]

  8. LDP Monitoring Commands:show mpls ldp neighbor detail Router#show mplsldp neighbor detailPeer 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. LDP Monitoring Commands:show mpls ldp bindings Router#show mplsldp 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. Monitoring Label Switching Router# show mpls forwarding-table • Displays contents of LFIB Router# show ip cef detail • Displays label or labels attached to a packet during label imposition on edge LSR

  11. Monitoring Label Switching:show mplsforwarding-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 <cr>

  12. Monitoring Label Switching:show mplsforwarding-table detail Router#show mpls forwarding-table detailLocal 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. 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. Debugging MPLS and LDP Router# debug mpls ldp ... • Debugs TDP adjacencies, session establishment, and label bindings exchange Router# debug mpls lfib … • Debugs LFIB events: label creations, removals, rewrite, and so on Router# debug mpls packets [interface] • Debugs labeled packets switched by the router

  15. Summary • Theshow mpls interfaces command will show only those interfaces that have had mpls enabled. • Use the showmpls ldp bindingscommand todisplay the LIB table. • Use the showmpls forwarding-tablecommand to display the LFIB table. • Use the debug mpls packetscommand with care because it causes fast and distributed switching to be disabled.

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