Controlling Sending Icmpv6 Packets; Configuring The Rate Limit For Icmpv6 Error Messages; Enabling Replying To Multicast Echo Requests; Enabling Sending Icmpv6 Destination Unreachable Messages - H3C MSR 2600 Configuration Manual

Step
2. Configure the aging time for
dynamic path MTUs.

Controlling sending ICMPv6 packets

This section describes how to configure ICMPv6 packet sending.

Configuring the rate limit for ICMPv6 error messages

To avoid sending excessive ICMPv6 error messages within a short period that might cause network
congestion, you can limit the rate at which ICMPv6 error messages are sent. A token bucket algorithm is
used with one token representing one ICMPv6 error message. Tokens are placed in the bucket at a
specific interval until the maximum number of tokens that the bucket can hold is reached. Tokens are
removed from the bucket when ICMPv6 error messages are sent. When the bucket is empty, ICMPv6
error messages are not sent until a new token is placed in the bucket.
To configure the rate limit for ICMPv6 error messages:
Step
1. Enter system view.
2. Set the interval and bucket size
for ICMPv6 error messages

Enabling replying to multicast echo requests

The device does not respond to multicast echo requests by default. In some scenarios, however, you must
enable the device to answer multicast echo requests so the source host can obtain needed information.
To enable the device to answer multicast echo requests:
Step
1. Enter system view.
2. Enable replying to multicast
echo requests.

Enabling sending ICMPv6 destination unreachable messages

The device sends ICMPv6 destination unreachable messages as follows:
Command
ipv6 pathmtu age age-time
Command
system-view
ipv6 icmpv6 error-interval
milliseconds [ bucketsize ]
Command
system-view
ipv6 icmpv6 multicast-echo-reply
enable
194
Remarks
The default setting is 10 minutes.
Remarks
N/A
By default, the bucket allows a
maximum of 10 tokens, and
tokens are placed in the bucket
at the interval of 100
milliseconds.
To disable the ICMPv6 rate limit,
set the interval to 0 milliseconds.
Remarks
N/A
By default, this function is not
enabled.