19
undo ip icmp error-interval
Default
A token is placed in the bucket every 100 milliseconds, and the bucket allows a maximum of 10
tokens.
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 ICMP 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 ICMP error messages are sent. Use this command to avoid
sending excessive ICMP error messages within a short period that might cause network congestion.
A token bucket algorithm is used with one token representing one ICMP 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 ICMP error message is sent. When the bucket is empty,
ICMP error messages are not sent until a new token is placed in the bucket.
Examples
# Set the interval to 200 milliseconds for tokens to arrive in the bucket and the bucket size to 40
tokens for ICMP error messages.
<Sysname> system-view
[Sysname] ip icmp error-interval 200 40
ip icmp source
Use
ip
icmp
source
to specify the source address for outgoing ICMP packets.
Use
undo
ip
icmp
source
to remove the specified source address for outgoing ICMP packets.
Syntax
ip icmp source
[
vpn-instance vpn-instance-name
]
ip-address
undo ip icmp source
[
vpn-instance vpn-instance-name
]
Default
No source address is specified for outgoing ICMP packets. The default source IP addresses for
different types of ICMP packets vary as follows:
•
For an ICMP error message, the source IP address is the IP address of the receiving interface
of the packet that triggers the ICMP error message. ICMP error messages include Time
Exceeded, Port Unreachable, and Parameter Problem messages.
•
For an ICMP echo request, the source IP address is the IP address of the sending interface.
•
For an ICMP echo reply, the source IP address is the destination IP address of the ICMP echo
request specific to this reply.
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