Chapter 25
| IP Interface Commands
IPv6 Interface
– 559 –
This example displays a brief summary of IPv6 addresses configured on the switch.
Console#show ipv6 interface brief
Interface VLAN IPv6 IPv6 Address
--------------- ---------- ---------- ------------------------------------
VLAN 1 Up Up 2001:DB8:2222:7273::72/96
VLAN 1 Up Up FE80::2E0:CFF:FE00:FD%1/64
Console#
Related Commands
show ip interface (541)
show ipv6 mtu This command displays the maximum transmission unit (MTU) cache for
destinations that have returned an ICMP packet-too-big message along with an
acceptable MTU to this switch.
Command Mode
Normal Exec, Privileged Exec
Link-local
address
Shows the link-local address assigned to this interface
Global unicast
address(es)
Shows the global unicast address(es) assigned to this interface
Joined group
address(es)
In addition to the unicast addresses assigned to an interface, a host is also
required to listen to all-nodes multicast addresses FF01::1 (interface-local scope)
and FF02::1 (link-local scope).
FF01::1/16 is the transient interface-local multicast address for all attached IPv6
nodes, and FF02::1/16 is the link-local multicast address for all attached IPv6
nodes. The interface-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.
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.
ND retransmit
interval
The interval between IPv6 neighbor solicitation retransmissions sent on an
interface during duplicate address detection.
Table 122: show ipv6 interface - display description (Continued)
Field Description
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