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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
354
no label-retention-mode
Parameters
38-20 lsp-control-mode
This command is used to set the LDP control mode. Use the no form of this command to restore the default value.
mpls ldp lsp-control-mode {independent | ordered}
no mpls ldp Isp-control-mode
Parameters
liberal Specifies to use the liberal label retention mode.
conservative Specifies to use the conservative label retention mode.
Default
Liberal Label Retention Mode.
Command Mode
MPLS Router Configuration Mode.
Command Default Level
Level: 15.
Usage Guideline
This command is used configure LDP label retention mode. If the label distribution
method is Downstream-Unsolicited and the label retention mode is conservative,
once the LSR received label bindings from LSRs which are not its next hop for that
FEC, it discards such bindings.
If the label retention mode is liberal, it maintains such bindings. It helps to speed up
the setup of LSP in case there is a change in the next hop.
Note: If LDP is running, configuring label retention mode will lead to LDP sessions
restart.
Example
This example shows how to configure the label retention mode to conservative.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)# mpls label protocol ldp
DXS-3600-32S(config-mpls-router)#label-retention-mode conservative
independent Specifies to use the independent control mode.
ordered Specifies to use the ordered control mode.
Default
Independent Control Mode.
Command Mode
MPLS Router Configuration Mode.
Command Default Level
Level: 15.
Usage Guideline
This command is used to configure the LSP control mode. In Independent LSP
Control, each LSR independently binds a label to a FEC and distributes the binding
to its label distribution peers.
In Ordered LSP Control, an LSR only binds a label to a FEC if it is the egress LSR
for that FEC, or if it has already received a label binding for that FEC from its next
hop for that FEC.
Note: If LDP is running, configuring the control mode will lead to LDP sessions
restart.
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