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…autoroute
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[dest address]
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Shows which tunnels have autoroute configured and are announcing information to the routing protocol.
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…fast-reroute database
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[{network [mask | masklength] | labels low label [-high label] | interface ifname [backup-interface ifname] | backup-interface ifname}]
[state {active | ready | partial}]
[role {head | middle}]
[detail]
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Shows information about the FRR database—which tunnels are protected, the status of protection tunnels, and so forth.
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…fast-reroute log reroutes
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None
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Shows a log of FRR events on a headend.
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…forwarding-adjacency
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[dest address]
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Shows information about tunnels with forwarding adjacency configured.
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…link-management
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[admission-control [interface-name] | advertisements | bandwidth-allocation [interface-name] | igp-neighbors [interface-name | igp-id {ospf ospf-id | isis isis-id} | ip node-address] | interfaces [interface-name] | statistics [interface-name] | summary [interface-name]]
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Shows information about MPLS TE's link manager, which deals with things such as deciding when to flood and which tunnel requests to admit.
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…topology
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[ip address | area | brief | igp-id | level-1 | level-2 | path]
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Gives information about the MPLS topology database. In particular, show mpls traffic-eng topology path is useful because it shows you the path a tunnel takes if you reoptimize it. This command is useful for troubleshooting as well.
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…tunnels
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[tunnel name | accounting | backup | brief | destination | down | interface | name | name-regexp | property | protection | role | source-id | statistics | suboptimal | summary | up]
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This is a rather complex command (lots of its options have suboptions), and it lists a lot of information. This command gives you information about what tunnels touch this router, and whether the router is a headend, midpoint, or tailend to those tunnels. Of particular use is show mpls traffic-eng tunnels suboptimal, which has a set of options after it that show you how far from various ideas of best case your tunnels stray. show mpls traffic-eng tunnels by itself is an extremely useful command, and one with which you'll want to be familiar.
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