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permit icmp
To allow all or specific internet control message protocol (ICMP) messages, configure a filter.
Syntax
permit icmp {source address mask | any | host ipv6-address} {destination
address | any | host ipv6-address} [message-type] [count [byte]] | [log]
[interval minutes] [threshold-in-msgs [count]][monitor]
To remove this filter, you have two choices:
● Use the no seq sequence-number command if you know the filter’s sequence number.
● Use the no permit icmp {source address mask | any | host ipv6-address}
{destination address | any | host ipv6-address} command.
Parameters
source address Enter the IPv6 address of the network or host from which the packets were sent in
the x:x:x:x::x format then the prefix length in the /x format. The range is from /0
to /128. The :: notation specifies successive hexadecimal fields of zero.
mask Enter a network mask in /prefix format (/x).
any Enter the keyword any to specify that all routes are subject to the filter.
host ipv6-
address
Enter the keyword host then the IPv6 address of the host in the x:x:x:x::x format.
The :: notation specifies successive hexadecimal fields of zero.
destination
address
Enter the IPv6 address of the network or host to which the packets are sent in
the x:x:x:x::x format then the prefix length in the /x format. The range is from /0
to /128. The :: notation specifies successive hexadecimal fields of zero.
message-type (OPTIONAL) Enter an ICMP message type, either with the type (and code, if
necessary) numbers or with the name of the message type. The range is from 0 to
255 for ICMP type and from 0 to 255 for ICMP code.
count (OPTIONAL) Enter the keyword count to count packets the filter processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the filter processes.
log (OPTIONAL) Enter the keyword log to enable the triggering of ACL log messages.
threshold-in-
msgs count
(OPTIONAL) Enter the threshold-in-msgs keyword followed by a value to
indicate the maximum number of ACL logs that can be generated, exceeding
which the generation of ACL logs is terminated with the seq, permit, or deny
commands. The threshold range is from 1 to 100.
interval minutes (OPTIONAL) Enter the keyword interval followed by the time period in minutes
at which ACL logs must be generated. The interval range is from 1 to 10 minutes.
monitor (OPTIONAL) Enter the keyword monitor to monitor traffic on the monitoring
interface specified in the flow-based monitoring session along with the filter
operation.
Defaults
By default, 10 ACL logs are generated if you do not specify the threshold explicitly. The default frequency
at which ACL logs are generated is five minutes. By default, flow-based monitoring is not enabled.
Command Modes ACCESS-LIST
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Added the support for flow-based monitoring on the MXL 10/40GbE Switch IO
Module platform
9.3(0.0) Added the support for logging of ACLs on the MXL 10/40GbE Switch IO Module
platform
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module platform.
IPv6 Access Control Lists (IPv6 ACLs) 583