Alcatel-Lucent 7450 Manual page 210

MPLS Commands
egress-statistics
Syntax [no] egress-statistics
Context config>router>mpls>lsp
config>router>mpls>lsp-template
Description
This command configures statistics in the egress data path of an originating LSP at a head-end node.
The user must execute the no shutdown for this command to effectively enable statistics.
The same set of counters is updated for packets forwarded over any path of the LSP and over the
lifetime of the LSP. In steady state, the counters are updated for packets forwarded over the active
path of the LSP. The active path can be the primary path, one of the secondary paths, the FRR detour
path, or the FRR bypass path when the head-end node is also the PLR.
LSP statistics are not collected on a dynamic or a static bypass tunnel itself. LSP egress statistics are
also not collected if the head-end node is also the Penultimate-Popping Hop (PHP) node for a single-
hop LSP using an implicit null label.
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. A
consequence of this is that when the user enables statistics collection on an RSVP LSP which is also
used for tunneling LDP FECs with the LDP over RSVP feature, then statistics will be collected on
the RSVP LSP only. There will be no statistics collected from an LDP FEC tunneled over this RSVP
LSP regardless if the user enabled statistics collection on this FEC. When, the user disables statistics
collection on the RSVP LSP, then statistics collection, if enabled, will be performed on a tunneled
LDP FEC.
The no form of this command disables the statistics in the egress data path and removes the
accounting policy association from the RSVP LSP.
Default no egress-statistics
exponential-backoff-retry
Syntax exponential-backoff-retry
no exponential-backoff-retry
Context configure>router>mpls
Description This command enables the use of an exponential back-off timer when re-trying an LSP. When an LSP
path establishment attempt fails, the path is put into retry procedures and a new attempt will be
performed at the expiry of the user-configurable retry timer (config>router>mpls>lsp>retry-timer).
By default, the retry time is constant for every attempt. The exponential back-off timer procedures
will double the value of the user configured retry timer value at every failure of the attempt to adjust
to the potential network congestion that caused the failure. An LSP establishment fails if no Resv
message was received and the Path message retry timer expired or a PathErr message was received
before the timer expired.
Page 210 7450 ESS MPLS Guide