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Disabling LDP Statistics on the Penultimate-Hop Router

Gathering LDP traffic statistics at the penultimate-hop router can consume excessive system resources, on next-hop routes in particular. This problem is exacerbated if you have configured the deaggregate statement in addition to the traffic-statistics statement. For routers reaching their limit of next-hop route usage, we recommend configuring the no-penultimate-hop option for the traffic-statistics statement:




traffic-statistics {
no-penultimate-hop;
}

For a list of hierarchy levels at which you can configure the traffic-statistics statement, see the statement summary section for this statement.

Note: When you configure the no-penultimate-hop option, no statistics are available for the FECs that are the penultimate hop for this router.

Whenever you include or remove this option from the configuration, the LDP sessions are taken down and then restarted.

The following is sample output from an LDP statistics file showing routers on which the no-penultimate-hop option is configured:

FEC                 Type            Packets          Bytes       Shared
10.255.245.218/32   Transit               0              0           No
                    Ingress               4            246           No
10.255.245.221/32   Transit     statistics disabled
                    Ingress     statistics disabled
13.1.1.0/24         Transit     statistics disabled
                    Ingress     statistics disabled
13.1.3.0/24         Transit     statistics disabled
                    Ingress     statistics disabled

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