3Com 5500-EI PWR Install Manual page 648

Configuration procedure
Follow these steps to define a basic ACL rule:
To do...
Enter system view
Create an ACL and enter
basic ACL view
Define an ACL rule
Configure a description
string to the ACL
Note that:
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.
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.
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.
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.
Configuration example
# Configure ACL 2000 to deny packets whose source IP addresses are 192.168.0.1.
<Sysname> system-view
[Sysname] acl number 2000
[Sysname-acl-basic-2000] rule deny source 192.168.0.1 0
# Display the configuration information of ACL 2000.
[Sysname-acl-basic-2000] display acl 2000
Basic ACL 2000, 1 rule
Acl's step is 1
rule 0 deny source 192.168.0.1 0
Use the command...
system-view
acl number acl-number
[ match-order { auto |
config } ]
rule [ rule-id ] { deny |
permit } [ rule-string ]
description text
1-6
Remarks
—
Required
config by default
Required
For information about
rule-string, refer to ACL
Command.
Optional
Not configured by default