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Cisco Nexus 5500 Series NX-OS Security Command Reference
OL-27883-02
Chapter P Commands
permit icmp (IPv4)
permit icmp (IPv4)
To create an access control list (ACL) rule that permits IPv4 ICMP traffic matching its conditions, use
the permit command. To remove a rule, use the no form of this command.
Need to test this: sequence-number] permit icmp source destination [icmp-message]
[sequence-number] permit icmp source destination [icmp-message | dscp dscp | fragments | log |
precedence precedence]
no permit icmp source destination [icmp-message | dscp dscp | fragments | log | precedence
precedence]
no sequence-number
Note You can also specify the icmp keyword by its protocol number. Valid numbers are from 0 to 255.
Syntax DescriptionI sequence-number (Optional) Sequence number of the permit command, which causes the
switch to insert the command in that numbered position in the access list.
Sequence numbers maintain the order of rules within an ACL.
A sequence number can be any integer between 1 and 4294967295.
By default, the first rule in an ACL has a sequence number of 10.
If you do not specify a sequence number, the switch adds the rule to the end
of the ACL and assigns to it a sequence number that is 10 greater than the
sequence number of the preceding rule.
Use the resequence command to reassign sequence numbers to rules.
source Source IPv4 addresses that the rule matches. For details about the methods
that you can use to specify this argument, see the “iSource and Destination”
section in the “Usage Guidelines” section.
destination Destination IPv4 addresses that the rule matches. For details about the
methods that you can use to specify this argument, see the “iSource and
Destination” section in the “Usage Guidelines” section.
icmp-message ICMP message number, which is an integer from 0 to 255, or a keyword. For
a list of keywords, see the “ICMP Message Types” section in the “Usage
Guidelines” section.
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