H3C SOHO IE4300, Command Reference Manual

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Views
System view
Predefined user roles
network-admin
Usage guidelines
ICMPv6 time exceeded messages are sent to the source of IPv6 packets after the device discards
IPv6 packets because hop or reassembly times out.
To prevent too many ICMPv6 error messages from affecting device performance, disable this
feature. Even with the feature disabled, the device still sends fragment reassembly time exceeded
messages.
Examples
# Disable sending ICMPv6 time exceeded messages.
<Sysname> system-view
[Sysname] undo ipv6 hoplimit-expires enable
ipv6 icmpv6 error-interval
Use
ipv6 icmpv6 error-interval
to set the bucket size and the interval for tokens to arrive in
the bucket for ICMPv6 error messages.
Use
undo ipv6 icmpv6 error-interval
to restore the default.
Syntax
ipv6 icmpv6 error-interval interval [ bucketsize ]
undo ipv6 icmpv6 error-interval
Default
The bucket allows a maximum of 10 tokens, and a token is placed in the bucket every 100
milliseconds.
Views
System view
Predefined user roles
network-admin
Parameters
interval : Specifies the interval for tokens to arrive in the bucket. The value range is 0 to
2147483647 milliseconds. To disable the ICMPv6 rate limit, set the value to 0.
bucketsize : Specifies the maximum number of tokens allowed in the bucket. The value range is
1 to 200.
Usage guidelines
This command limits the rate at which ICMPv6 error messages are sent. Use this command to
prevent network congestion caused by excessive ICMPv6 error messages generated within a short
period. A token bucket algorithm is used with one token representing one ICMPv6 error message.
A token is placed in the bucket at intervals until the maximum number of tokens that the bucket can
hold is reached.
A token is removed from the bucket when an ICMPv6 error message is sent. When the bucket is
empty, ICMPv6 error messages are not sent until a new token is placed in the bucket.