H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 335)

36-6
Configuring Advanced ACL
An advanced ACL can filter packets by their source and destination IP addresses, the protocols carried
by IP, and protocol-specific features such as TCP/UDP source and destination ports, ICMP message
type and message code.
An advanced ACL can be numbered from 3000 to 3999. Note that ACL 3998 and ACL 3999 cannot be
configured because they are reserved for cluster management.
Advanced ACLs support analysis and processing of three packet priority levels: type of service (ToS)
priority, IP priority and differentiated services codepoint (DSCP) priority.
Using advanced ACLs, you can define classification rules that are more accurate, more abundant, and
more flexible than those defined for basic ACLs.
Configuration Prerequisites
z
To configure a time range-based advanced ACL rule, you need to create the corresponding time
ranges first. For information about of time range configuration, refer to
Configuring Time Range .
z
The settings to be specified in the rule, such as source and destination IP addresses, the protocols
carried by IP, and protocol-specific features, are determined.
Configuration Procedure
Follow these steps to define an advanced ACL rule:
To do… Use the command… Remarks
Enter system view system-view —
Create an advanced ACL
and enter advanced ACL
view
acl number acl-number
[ match-order { auto | config } ]
Required
config by default
Define an ACL rule
rule [ rule-id ] { permit | deny }
protocol [ rule-string ]
Required
For information about protocol and
rule-string
, refer to ACL in H3C WX3000
Series Unified Switches Switching
Engine Command Reference
.
Assign a description
string to the ACL rule
rule rule-id comment text
Optional
No description by default
Assign a description
string to the ACL
description text
Optional
No description by default
Note that:
z
With the config match order specified for the advanced ACL, you can modify any existent rule. The
unmodified part of the rule remains. With the auto match order specified for the 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, it is the maximum rule
number plus one.
z
The content of a modified or created rule cannot be identical with the content of any existing rules;
otherwise the rule modification or creation will fail, and the system prompts that the rule already
exists.