1-11
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
# Create basic ACL 2001 and define rule 1 to deny packets that are non-tail fragments.
[Sysname] acl number 2001
[Sysname-acl-basic-2001] rule 1 deny fragment
[Sysname-acl-basic-2001] quit
# Create basic ACL 2002 and define rule 1 to deny all packets during the period specified by time range
trname.
[Sysname] acl number 2002
[Sysname-acl-basic-2002] rule 1 deny time-range trname
After completing the above configuration, you can use the display acl command to view the
configuration information of the ACLs.
rule (for Advanced ACLs)
Syntax
rule [ rule-id ] { deny | permit } protocol [ rule-string ]
undo rule rule-id [ destination | destination-port | dscp | fragment | icmp-type | precedence |
source | source-port | time-range | tos ]*
View
Advanced ACL view
Parameters
Parameters of the rule command
rule-id: ACL rule ID, in the range of 0 to 65534.
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