IP Interface Commands
41-16
41
This example displays a brief summary of IPv6 addresses configured on the router.
Related Commands
show ip interface (41-5)
Joined group
address(es)
In addition to the unicast addresses assigned to an interface, a node is required
to join the all-nodes multicast addresses FF01::1 and FF02::1 for all IPv6 nodes
within scope 1 (interface-local) and scope 2 (link-local), respectively.
FF01::1/16 is the transient node-local multicast address for all attached IPv6
nodes, and FF02::1/16 is the link-local multicast address for all attached IPv6
nodes. The node-local multicast address is only used for loopback transmission
of multicast traffic. Link-local multicast addresses cover the same types as used
by link-local unicast addresses, including all nodes (FF02::1), all routers
(FF02::2), and solicited nodes (FF02::1:FFXX:XXXX) as described below.
A node is also required to compute and join the associated solicited-node
multicast addresses for every unicast and anycast address it is assigned. IPv6
addresses that differ only in the high-order bits, e.g. due to multiple high-order
prefixes associated with different aggregations, will map to the same
solicited-node address, thereby reducing the number of multicast addresses a
node must join. In this example, FF02::1:FF90:0/104 is the solicited-node
multicast address which is formed by taking the low-order 24 bits of the address
and appending those bits to the prefix.
MTU Maximum transmission unit for this interface.
ND DAD Indicates whether (neighbor discovery) duplicate address detection is enabled.
number of DAD attempts The number of consecutive neighbor solicitation messages sent on the interface
during duplicate address detection.
Console#show ipv6 interface brief
Vlan 1 is up
IPv6 is enable.
FF01::1
2009:DB9:2229::79
FE80::269:3EF9:FE19:6779
FF02::1
FF02::1:FF00:79
FF02::1:FF19:6779
Console#
Table 41-3 show ipv6 interface - display description (Continued)
Field Description
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