Alcatel-Lucent 7710 SR OS Configuration Manual page 276

Special Cases
Page 276
Executing backup multiple times with the same ipv6-addr results in no operation performed and no
error generated. At least one successful backup ipv6-addr command must be executed before the
virtual router instance can enter the operational state.
When operating as (non-owner) master, the default functionality associated with ipv6-addr is ARP
response to ARP requests to ip-addr, routing of packets destined to the virtual router instance source
MAC address and silently discarding packets destined to ipv6-addr. An IPv6 virtual router instance
can enter the operational state only if one of the configured backup address is a link-local address and
the router advertisement of the interface is configured to use the virtual MAC address. Enabling the
non-owner-access parameters selectively allows ping, Telnet and traceroute connectivity to ipv6-addr
when the virtual router instance is operating as master.
The no form of the command removes the specified virtual router IP address from the virtual router
instance. For non-owner virtual router instances, this causes all routing and local access associated
with the ipv6-addr to cease. For owner virtual router instances, the no backup command only
removes ipv6-addr from the list of advertised IP addresses. If the last ipv6-addr or the link-local
address is removed from the virtual router instance, the virtual router instance will enter the
operationally down state
Assigning the Virtual Router ID Address — Once the vrid is created on the parent IP
interface, IP addresses need to be assigned to the virtual router instance. If the vrid was created with
the keyword owner, the virtual router instance IP addresses must have one or more of the parent IP
interface defined IP addresses. For non-owner virtual router instances, the virtual router IP addresses
each must be within one of the parental IP interface IP address defined local subnets. For both owner
and non-owner virtual router instances, the virtual router IP addresses must be explicitly defined
using the backup ipv6-addr command.
The following rules apply when adding, changing, or removing parental and virtual router IP
addresses:
Owner Virtual Router IP Address Parental Association — When an IP address is assigned
to an owner virtual router instance, it must be associated with one of the parental IP interface-
assigned IP addresses.
Example - Owner Virtual Router Instance
Parent IP addresses:
Virtual router IP addresses:
Non-Owner Virtual Router IP Address Parental Association — When an IP address is
assigned to a non-owner virtual router instance, it must be associated with one of the parental IP
interface assigned IP addresses. The virtual router IP address must be a valid IP address within one of
10.10.10.10/24
11.11.11.11/24
10.10.10.11 Invalid (not equal to parent IP address)
10.10.10.10 Associated (same as parent IP address
10.10.10.10)
10.10.11.11 Invalid (not equal to parent IP address)
11.11.11.254 Invalid (not equal to parent IP address)
11.11.11.255 Invalid (not equal to parent IP address)
7710 SR OS Router Configuration Guide