IPv6 Configuration Guide K/KA/KB.15.15

NOTE: If multiple routers on the same VLAN or tunnel are configured to advertise
a reachable time, all such routers should use the same reachable-time setting.
Setting or changing the Neighbor Discovery retransmit timer
Syntax:
ipv6 nd ra ns-interval [ 1000 - 4294967295 | unspecified ]
[no] ipv6 nd ra ns-interval
Used on VLAN or tunnel interfaces to advertise the period (retransmit timer) in
milliseconds between ND solicitations sent by a host for an unresolved destination,
or between DAD neighbor solicitation requests. Increasing this setting is indicated
where neighbor solicitation retries or failures are occurring, or in a "slow" (WAN)
network.
1000 - 4294967295
An advertised setting in this range replaces the corresponding, locally configured
setting in hosts on the VLAN.
unspecified
Sets the retransmit timer value in RAs to zero, which causes the hosts on the
VLAN or tunnel to use their own locally configured NS-interval settings instead
of using the value received in the RAs.
The no form returns the setting to its default.
Default: unspecified (0) ; Range: 1000 - 4294967295 ms
NOTE: This is the retransmit timer advertised as a host-specific variable. It is
separate from the retransmit timer used by the routing switch for its own ND
solicitations (ipv6 nd ns-interval).
If multiple routers on the same VLAN or tunnel are configured to advertise an
ns-interval (retransmit time), all such routers should use the same NS-interval
setting.
The default NS-interval setting for IPv6 host operation on HP devices is 1000 ms.
When the above command is used with the unspecified option to configure RAs,
host devices configured by using the RA maintain their preconfigured NS-interval
settings.
Configuring the global unicast prefix and lifetime for hosts on a VLAN
These commands define the content of RAs transmitted on a VLAN or tunnel.
Syntax:
[no] ipv6 nd ra prefix ipv6-prefix/prefix-len
[ valid-lifetime preferred-lifetime | at | valid-date
preferred-date | infinite | at | no-advertise ]
[ no-autoconfig ]
[ off-link ]
Syntax:
[no] ipv6 nd ra prefix default
[ valid-lifetime preferred-lifetime | at | valid-date
preferred-date | infinite | at | no-advertise ]
[ no-autoconfig ]
[ off-link ]
VLAN or tunnel context ND configuration 189