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reachability of a neighbor. Therefore, avoid using very short intervals for
normal IPv6 operations.
Example
The following sets the interval between sending neighbor solicitation messages to
30000 milliseconds:
Console(config)#interface vlan 1
Console(config-if)#ipv6 nd ns-interval 30000
Console(config-if)#end
Console#show ipv6 interface
Vlan 1 is up
IPv6 is enable.
Link-local address:
FE80::200:E8FF:FE90:0/64
Global unicast address(es):
2009:DB9:2229::79, subnet is 2009:DB9:2229:0::/64
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
ND router advertisements are sent every 200 seconds
Console#
Related Commands
show running-config (23-5)
show ipv6 neighbors
This command displays information in the IPv6 neighbor discovery cache.
Syntax
show ipv6 neighbors [vlan vlan-id | ipv6-address]
• vlan-id - VLAN ID (Range: 1-4093)
• ipv6-address - The IPv6 address of a neighbor device. You can specify
either a link-local or global unicast address formatted according to RFC
2373 “IPv6 Addressing Architecture,” using 8 colon-separated 16-bit
hexadecimal values. One double colon may be used in the address to
indicate the appropriate number of zeros required to fill the undefined fields.
Default Setting
All IPv6 neighbor discovery cache entries are displayed.
Command Mode
Normal Exec - No command options are available.
Privileged Exec - All command options are available.
41-30
IP Interface Commands
41