IP Router Configuration Command Reference
150 Router Configuration Guide
Default df-bit-lac always
Parameters always — Specifies that the LAC will send all L2TP packets with the DF bit set to 1.
never — Specifies that the LAC will send all L2TP packets with the DF bit set to 0.
df-bit-lac
Syntax df-bit-lac {always | never | default}
no df-bit-lac
Context config>router/service>vprn>l2tp>group
config>router/service>vprn>l2tp>group>tunnel
Description By default, the LAC df-bit-lac is set to default and sends all L2TP packets with the DF bit set to 1. The
DF bit is configurable to allow downstream routers to fragment the L2TP packets. The LAC itself will
not fragment L2TP packets. L2TP packets that have a larger MTU size than what the LAC egress ports
allows are dropped. The configuration of the df-bit can be overridden at different levels: l2tp, tunnel,
and group. The configuration at the tunnel level overrides the configuration on both group and l2tp.
The configuration at the group level overrides the configuration on l2tp.
Default df-bit-lac default
Parameters always — Specifies that the LAC will send all L2TP packets with the DF bit set to 1.
never — Specifies that the LAC will send all L2TP packets with the DF bit set to 0.
default — Follows the DF-bit configuration specified on upper levels.
destruct-timeout
Syntax destruct-timeout destruct-timeout
no destruct-timeout
Context config>router>l2tp>group
config>router>l2tp>group>tunnel
Description This command configures the period of time that the data of a disconnected tunnel will persist before
being removed.
The no form of the command removes the value from the configuration.
Default no destruct-timeout
Parameters destruct-timeout — [Specifies the automatic removal of dynamic L2TP sessions, in seconds, that
are no longer active.
Default no destruct-timeout
Values 60 to 86400
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