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Controlling sending icmpv6 messages, Enabling replying to multicast echo requests, Specifying the source interface for dns packets – H3C Technologies H3C S12500-X Series Switches User Manual

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To configure a customer-side port:

Step Command

Remarks

1.

Enter system view.

system-view N/A

2.

Create a VLAN interface and
enter its view.

interface vlan-interface
vlan-interface-id

If the VLAN interface exists, you
directly enter its view.

3.

Specify the VLAN interface as a
customer-side port.

ipv6 nd mode uni

By default, a port operates as a
network-side port.

Controlling sending ICMPv6 messages

This section describes how to configure ICMPv6 message 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 Command

Remarks

1.

Enter system view.

system-view N/A

2.

Set the interval and bucket size

for ICMPv6 error messages

ipv6 icmpv6 error-interval
milliseconds [ bucketsize ]

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.

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 Command

Remarks

1.

Enter system view.

system-view

N/A

2.

Enable replying to multicast

echo requests.

ipv6 icmpv6 multicast-echo-reply
enable

By default, this function is not
enabled.

This manual is related to the following products: