Ipv6 Unreachables - Cisco 300 Series Cli Manual

IPv6 Commands
OL-32830-01 Command Line Interface Reference Guide
Example 3. The following example deletes all static entries in the IPv6 neighbor
discovery cache on VLAN 1:
switchxxxxxx(config)#
Example 4. The following example deletes all static entries in the IPv6 neighbor
discovery cache on all interfaces:
switchxxxxxx(config)#

27.12 ipv6 unreachables

Use the ipv6 unreachables command in Interface Configuration mode to enable
the generation of Internet Control Message Protocol for IPv6 (ICMPv6)
unreachable messages for any packets arriving on a specified interface.
To prevent the generation of unreachable messages, use the no form of this
command.
Syntax
ipv6 unreachables
no ipv6 unreachables
Parameters
N/A.
Default Configuration
The sending of ICMP IPv6 unreachable messages is enabled.
Command Mode
Interface Configuration mode
User Guidelines
If the switch receives a Unicast packet destined for itself that uses a protocol it
does not recognize, it sends an ICMPv6 unreachable message to the source.
no ipv6 neighbor vlan1
no ipv6 neighbor
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