Table of Contents
Advertisement
Understanding IPv6
Prefix information options specify the prefixes that are on-link and are used for address
autoconfiguration. A router includes all of its on-link prefixes (except the link-local prefix) so that
multihome hosts have complete prefix information about on-link destinations for the links to which they
attach.
The autogenerated address is obtained by appending the interface IEEE EUI-64 to the prefix in the prefix
information option in the router advertisement. If the sum of the prefix length and interface identifier
length does not equal 128 bits, the prefix information option is ignored.
Link-local Address Configuration
These are examples of the show command output with ipv6 enable configured on an interface:
switch# show running-config interface fastethernet1/0/16
Building configuration...
Current configuration : 79 bytes
!
interface FastEthernet1/0/16
no switchport
no ip address
ipv6 enable
end
switch# show interface fastethernet1/0/16
FastEthernet1/0/16 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 000b.462e.9047 (bia 000b.462e.9047)
switch# show ipv6 interface fastethernet1/0/16
FastEthernet1/0/16 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::20B:46FF:FE2E:9047
No global unicast address is configured
Joined group address(es):
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND router advertisements are sent every 200 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses.
Global-Address Configuration
This configuration shows site-local and global-address autoconfiguration enabled after using the ipv6
address autoconfig command on an interface:
switch# show running-config interface fastethernet1/0/16
Building configuration...
Current configuration : 104 bytes
!
interface FastEthernet1/0/16
no switchport
no ip address
ipv6 address autoconfig
end
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
35-6
FF02::1
FF02::2
FF02::1:FF2E:9047
Chapter 35
Configuring IPv6 Host Functions
OL-8915-03
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
