60 IPv6 Interface Commands

in a “pending” state. Duplicate address detection is automatically restarted when the interface is administratively re-activated.

An interface that is re-activated restarts duplicate address detection for all unicast IPv6 addresses on the interface. While duplicate address detection is performed on the interface’s link-local address, the other IPv6 addresses remain in a “tentative” state. If no duplicate link-local address is found, duplicate address detection is started for the remaining IPv6 addresses.

If a duplicate address is detected, it is set to “duplicate” state, and a warning message is sent to the console. If a duplicate link-local address is detected, IPv6 processes are disabled on the interface. If a duplicate global unicast address is detected, it is not used. All configuration commands associated with a duplicate address remain configured while the address is in “duplicate” state.

If the link-local address for an interface is changed, duplicate address detection is performed on the new link-local address, but not for any of the IPv6 global unicast addresses already associated with the interface.

Example

The following configures five neighbor solicitation attempts for addresses configured on VLAN 1. The show ipv6 interface command indicates that the duplicate address detection process is still on-going.

Console(config)#interface vlan 1 Console(config-if)#ipv6 nd dad attempts 5 Console(config-if)#end

Console#show ipv6 interface Vlan 1 is up

IPv6 is stalled. Link-local address:

FE80::200:E8FF:FE90:0/64 [TENTATIVE] Global unicast address(es):

2009:DB9:2229::79, subnet is 2009:DB9:2229:0::/64 [TENTATIVE] Joined group address(es):

FF01::1/16

FF02::1/16

FF02::1:FF00:79/104

FF02::1:FF90:0/104 MTU is 1500 bytes.

ND DAD is enabled, number of DAD attempts: 5. ND retransmit interval is 1000 milliseconds Console#

Related Commands

ipv6 nd ns interval (60-25) show ipv6 neighbors (60-26)

60-24

Page 556
Image 556
Accton Technology ES4524D, ES4548D, 24/48-Port manual Ipv6 nd ns interval 60-25 show ipv6 neighbors