IPv6 Diagnostic and Troubleshooting

Introduction

Introduction

Feature

Default

CLI

IPv6 ICMP Message Interval and

100 ms

8-3

Token Bucket

10 max tokens

 

ping6

Enabled

 

traceroute6

n/a

 

 

 

 

The IPv6 ICMP feature enables control over the error and informational message rate for IPv6 traffic, which can help mitigate the effects of a Denial- of-service attack. Ping6 enables verification of access to a specific IPv6 device, and traceroute6 enables tracing the route to an IPv6-enabled device on the network.

ICMP Rate-Limiting

ICMP rate-limiting controls the rate at which ICMPv6 generates error and informational messages for features such as:

■neighbor solicitations

■neighbor advertisements

■multicast listener discovery (MLD)

■path MTU discovery (PMTU)

■duplicate address discovery (DAD)

■neighbor unreachability detection (NUD)

■router discovery

■neighbor discovery (NDP)

ICMPv6 error message generation is enabled by default. The rate of message generation can be adjusted, or message generation can be disabled.

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