Specifications

mpls ldp backoff
MP-211
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
Usage Guidelines The LDP backoff mechanism prevents two incompatibly configured label switch routers (LSRs) from
engaging in an unthrottled sequence of session setup failures. For example, an incompatibility arises
when two neighboring routers attempt to perform LC-ATM (label-controlled ATM) but the two are using
different ranges of VPI/VCI values for labels.
If a session setup attempt fails due to an incompatibility, each LSR delays its next attempt (that is, backs
of
f), increasing the delay exponentially with each successive failure until the maximum backoff delay is
reached.
The default settings correspond to the lowest settings for initial and maximum backoff values defined by
t
he LDP protocol specification. You should change the settings from the default values only if such
settings result in undesirable behavior.
Examples The following command shows how to set the initial backoff delay to 30 seconds and the maximum
ba
ckoff delay to 240 seconds:
Router(config)# mpls ldp backoff 30 240
Related Commands Command Description
show mpls ldp backoff Displays information about the configured session setup backoff parameters
a
nd any potential LDP peers with which session setup attempts are being
throttled.
show mpls ldp
pa
rameters
Displays current LDP parameters.