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| IP Interface Commands
C
49
HAPTER
IPv6 Interface
link-local address is made with an address prefix of FE80 and a host
portion based the switch's MAC address in modified EUI-64 format.)
When configuring a global IPv6 address for a static tunnel, the link-local
◆
address generated by this command is the 32-bit IPv4 address of the
underlying source interface, with the bytes in the same order in which
they would appear in the header of an IPv4 packet, padded at the left
with zeros to a total of 64 bits. Note that the "Universal/Local" bit is
zero, indicating that the interface identifier is not globally unique. When
the host has more than one IPv4 address in use on the physical
interface concerned, the primary address for that interface is used. The
IPv6 link-local address for an IPv4 virtual interface is formed by
appending the interface identifier, as defined above, to the prefix
FE80::/64.
◆
If a duplicate address is detected, a warning message is sent to the
console.
E
XAMPLE
This example specifies a full IPv6 address and prefix length.
Console(config)#interface vlan 1
Console(config-if)#ipv6 address 2001:DB8:2222:7272::72/96
Console(config-if)#end
Console#show ipv6 interface
VLAN 1 is up
IPv6 is enabled.
Link-local address:
FE80::2E0:CFF:FE00:FD/64
Global unicast address(es):
2001:DB8:2222:7272::72/96, subnet is 2001:DB8:2222:7272::/96
Joined group address(es):
FF02::1:FF00:72
FF02::1:FF00:FD
FF02::1
IPv6 link MTU is 1500 bytes
ND DAD is enabled, number of DAD attempts: 3.
ND retransmit interval is 1000 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
Console#
R
C
ELATED
OMMANDS
ipv6 address eui-64 (1667)
show ipv6 interface (1672)
ip address (1648)
– 1666 –
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