Configuring Ldp Fec Statistics - Nokia 7705 SAR-W Series Manual

MPLS and RSVP-TE
The LSP counters are maintained over the lifetime of the LSP as long as statistics
are enabled. The user can clear the counters with the
clear>router>mpls>lsp-ingress-stats ip-address lsp lsp-name command.
When a hierarchy of LSPs is in use, statistics collection on the outermost label
corresponding to the tunneling LSP and on the inner labels, corresponding to the
tunneled LSPs, are mutually exclusive. The outermost label takes precedence.
Because ingress data path statistics are not supported for an LDP FEC, there are no
statistics collected for an LDP FEC, however if the LDP FEC is tunneled over an
RSVP shortcut LSP that has LSP ingress statistics configured, the statistics are
collected for the RSVP LSP
The user can enable statistics collection on a manual bypass LSP terminating on the
egress LER. However, all LSPs whose primary path is protected by the manual
bypass will not collect statistics when they activate forwarding over the manual
bypass. If the user disables statistics collection on the manual bypass LSP, statistics
collection, if enabled, is continued on the protected LSP when the bypass LSP is
activated.
A flag in the output of the show command for the LSP statistics will indicate if there
were no path state blocks (PSBs) that matched the specified LSP name at any given
point in time. This could be due to the absence of the RSVP session or to the
presence of a session type that is not supported; for example, the LSP name
matched a point-to-multipoint LSP. The counters will show all zero values, which
could otherwise be confused with an LSP with a valid matched PSB that is not
receiving packets.
3.3.2.3
At the ingress LER and LSR, statistics collection is configured in the egress data path
of an LDP FEC by specifying the FEC prefix with the config>router>ldp>egress-
statistics>fec-prefix command. Statistics collection is enabled in the egress data
path after the user executes the no shutdown command under the egress-
statistics context. By default, this function is in a shutdown state.
The no form of the egress-statistics command disables statistics collection in the
egress data path and removes the accounting policy association from the LDP FEC.
Users can choose to disable statistics in the egress data path while keeping the
accounting policy association of the LDP FEC with the config>router>ldp>egress-
statistics>fec-prefix>shutdown command.
Statistics collection applies to prefix FECs imported from both LDP neighbors and T-
LDP neighbors.
46

Configuring LDP FEC Statistics

Use subject to Terms available at: www.nokia.com
© 2022 Nokia.
MPLS Guide
3HE 18686 AAAB TQZZA