CLI Reference Guide-R04

Chapter 31 | IP Interface Commands
IPv6 Interface
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Default Setting
None
Command Mode
Global Configuration
Command Usage
◆ Address Resolution Protocol (ARP) has been replaced in IPv6 with the Neighbor
Discovery Protocol (NDP). The ipv6 neighbor command is similar to the mac-
address-table static command (page 502) that is implemented using ARP.
◆ Static entries can only be configured on an IPv6-enabled interface.
◆ The switch does not determine whether a static entry is reachable before
placing it in the IPv6 neighbor discovery cache.
◆ If the specified entry was dynamically learned through the IPv6 neighbor
discovery process, and already exists in the neighbor discovery cache, it is
converted to a static entry. Static entries in the IPv6 neighbor discovery cache
are not modified if subsequently detected by the neighbor discovery process.
◆ Disabling IPv6 on an interface with the no ipv6 enable command (see
page 914) deletes all dynamically learned entries in the IPv6 neighbor
discovery cache for that interface, but does not delete static entries.
Example
The following maps a static entry for global unicast address to a MAC address.
Console(config)#ipv6 neighbor 2009:DB9:2229::81 vlan 1 30-65-14-01-11-86
Console(config)#end
Console#show ipv6 neighbors
IPv6 Address Age Link-layer Addr State Vlan
2009:DB9:2229::80 956 12-34-11-11-43-21 STALE 1
2009:DB9:2229::81 Permanent 30-65-14-01-11-86 REACH 1
FE80::1034:11FF:FE11:4321 961 12-34-11-11-43-21 STALE 1
Console#
Related Commands
show ipv6 neighbors (937)
mac-address-table static (502)