C613-50100-01 REV C Command Reference for x930 Series 752
AlliedWare Plus™ Operating System - Version 5.4.6-1.x
IP ADDRESSING AND PROTOCOL COMMANDS
OPTIMISTIC
-ND
optimistic-nd
Overview Use this command to enable the optimistic neighbor discovery feature for both
IPv4 and IPv6.
Use the no variant of this command to disable the optimistic neighbor discovery
feature.
Syntax
optimistic-nd
no optimistic-nd
Default The optimistic neighbor discovery feature is enabled by default.
Mode Interface Configuration for a VLAN interface.
Usage The optimistic neighbor discovery feature allows the device, after learning an IPv4
or IPv6 neighbor, to refresh the neighbor before the neighbor is deleted from the
hardware L3 switching table. The neighbor is put into the ‘stale’ state in the
software switching table if is it not refreshed, then the ‘stale’ neighbors are deleted
from the hardware L3 switching table.
The optimistic neighbor discovery feature enables the device to sustain L3 traffic
switching to a neighbor without interruption. Without the optimistic neighbor
discovery feature enabled L3 traffic is interrupted when a neighbor is ‘stale’ and is
then deleted from the L3 switching table.
If a neighbor receiving optimistic neighbor solicitations does not answer
optimistic neighbor solicitations with neighbor advertisements, then the neighbor
will be put into the ‘stale’ state, and subsequently deleted from both the software
and the hardware L3 switching tables.
Examples To enable the optimistic neighbor discovery feature on vlan100, use the
following commands:
awplus# configure terminal
awplus(config)# interface vlan100
awplus(config-if)# optimistic-nd
To disable the optimistic neighbor discovery feature on vlan100, use the
following commands:
awplus# configure terminal
awplus(config)# interface vlan100
awplus(config-if)# no optimistic-nd
Validation
Commands
show running-config
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