1-11
sour-wildcard is the complement of the wildcard mask of the source subnet mask. For example, you
need to input 0.0.255.255 to specify the subnet mask 255.255.0.0.
Parameters of the undo rule command
rule-id: Rule ID, which must the ID of an existing ACL rule. You can obtain the ID of an ACL rule by using
the display acl command.
fragment: Removes the settings concerning non-tail fragments in the ACL rule.
source: Removes the settings concerning source address in the ACL rule.
time-range: Removes the settings concerning time range in the ACL rule.
Description
Use the rule command to define an ACL rule.
Use the undo rule command to remove an ACL rule or specified settings of an ACL rule.
To remove an ACL rule using the undo rule command, you need to provide the ID of the ACL rule. If no
other arguments are specified, the entire ACL rule is removed. Otherwise, only the specified information
of the ACL rule is removed.
Note that:
z With the config match order specified for the basic ACL, you can modify any existent rule. The
unmodified part of the rule remains. With the auto match order specified for the basic ACL, you
cannot modify any existent rule; otherwise the system prompts error information.
z If you do not specify the rule-id argument when creating an ACL rule, the rule will be numbered
automatically. If the ACL has no rules, the rule is numbered 0; otherwise, the number of the rule will
be the greatest rule number plus one. If the current greatest rule number is 65534, however, the
system will display an error message and you need to specify a number for the rule.
z The content of a modified or created rule cannot be identical with the content of any existing rule;
otherwise the rule modification or creation will fail, and the system prompts that the rule already
exists.
z With the auto match order specified, the newly created rules will be inserted in the existent ones by
depth-first principle, but the numbers of the existent rules are unaltered.
Examples
# Create basic ACL 2000 and define rule 1 to deny packets whose source IP addresses are
192.168.0.1.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] acl number 2000
[Sysname-acl-basic-2000] rule 1 deny source 192.168.0.1 0
[Sysname-acl-basic-2000] quit
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