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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
353
38-18 keepalive-holdtime
This command is used to configure the keep-alive hold-time for LDP sessions. Use the no form of this command to
restore the default value.
keepalive-holdtime SECONDS
no keepalive-holdtime
Parameters
38-19 label-retention-mode
This command is used to set the label retention mode. Use the no form of this command to restore the default value.
label-retention-mode {liberal | conservative}
Usage Guideline
The LDP back-off mechanism prevents two incompatibly configured LSRs from
engaging in an endless sequence of session setup failures. If a session setup
attempt fails due to an incompatibility, the active LSR delays its next attempt (that is,
backs off), and then retries the session establishment.
The delay begins at 15 seconds, and it is increased exponentially with each
successive failure until the maximum back-off delay is reached. The maximum [back
off] delay is configurable, with the minimum amount being 120 seconds. The default
value is 600 seconds.
If a session cannot be established and the trap/log state is enabled, LDP will send a
trap/log to SNMP server to notify the session establishment failure.
Example
This example shows how to configure the maximum back-off delay time to 1000
seconds.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)# mpls label protocol ldp
DXS-3600-32S(config-mpls-router)# backoff maximum 1000
SECONDS Specifies the keep-alive hold-time in seconds. The range is 15-65535 seconds.
Default
40 seconds.
Command Mode
MPLS Router Configuration Mode.
Command Default Level
Level: 15.
Usage Guideline
This command is used to configure the LDP session keep-alive hold-time. LDP
maintains a keep-alive hold timer for each peer session. If the keep-alive hold timer
expires without receipt of an LDP PDU from the peer, LDP concludes that the peer
has failed and terminates the LDP session.
Each LSR sends keep-alive messages at regular intervals to its LDP peers to keep
the sessions active. The keep-alive interval is one third of the keep-alive hold-time.
Note: If LDP is running, configuring keep-alive hold-time will lead to LDP sessions
restart.
Example
This example shows how to configure the keep-alive hold-time to 60 seconds.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)# mpls label protocol ldp
DXS-3600-32S(config-mpls-router)# keepalive-holdtime 60
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