IPv6 Neighbor Discovery Configuration

In this section we will demonstrate briefly the commands used to configure some of the most common IPv6 Neighbor Discovery (ND) features. All these commands apply to layer 3 VLAN interfaces or routed interfaces. For more detailed command references of all the IPv6 ND features, visit the IPv6 Command Reference Page by clicking here.

Router Advertisement (RA)

IPv6 Routers periodically advertise their presence to other nodes by sending RA packets. Run the command below to enable RA on a layer 3 interface.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd suppress-ra false
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd suppress-ra false
admin@Xorplus# commit

Router Advertisement Interval

To set the RA interval, run the command below. RA interval can be set in milliseconds or in seconds. The example below sets the RA interval to 1000 seconds.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd ra-interval sec 1000
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd ra-interval sec 1000
admin@Xorplus# commit

RA Fast Retransmit

According to RFC4861 consecutive RA packets should be sent with at least 3 seconds delay. PICOS by default bypasses this restriction by fast transmission of RA to achieve better convergence. Run the command below enable or disable this feature. Default is enabled.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd ra-fast-retrans false
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd ra-fast-retrans false
admin@Xorplus# commit

Default Router Preference

Routers may include the default router preference in RA packets to signal to nodes the router preference in low, medium or high. Router preference is send using the unused bits in the RA packet. The hosts that do not implement the default router preference will ignore these bits. The command below sets the default router preference to low.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd router-preference low
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd router-preference low
admin@Xorplus# commit

Advertisement Interval Option

The Advertisement Interval Option indicates to host the maximum time in milliseconds between successive unsolicited Router Advertisements. Run the command below to set this option.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd adv-interval-option
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd adv-interval-option
admin@Xorplus# commit

Home Agent Option

The Home Agent Option flag can be set or unset in IPv6 RA packets and is used to indicate to hosts that the router acts as Home Agent and includes a Home Agent Option. This option is not set by default. Run the command below to set this option.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd home-agent-config-flag
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd home-agent-config-flag
admin@Xorplus# commit

Home Agent Lifetime

This parameter specifies the value to be place in Home Agent Option when its set. The default value is 0 which means the current Router Lifetime value. The command below sets the Home Agent Lifetime to 5 seconds.

admin@XorPlus# set l3-interface vlan-interface vlan4001 ipv6-nd home-agent-lifetime 5
admin@Xorplus# commit

or

admin@XorPlus# set l3-interface routed-interface rif-ge3 ipv6-nd home-agent-lifetime 5
admin@Xorplus# commit