Classifying Traffic By Using Class Maps - Cisco WS-C3560-48PS-S Software Configuration Manual

Configuring Standard QoS

Classifying Traffic by Using Class Maps

You use the class-map global configuration command to name and to isolate a specific traffic flow (or
class) from all other traffic. The class map defines the criteria to use to match against a specific traffic
flow to further classify it. Match statements can include criteria such as an ACL, IP precedence values,
or DSCP values. The match criterion is defined with one match statement entered within the class-map
configuration mode.
Note You can also create class-maps during policy map creation by using the class policy-map configuration
command. For more information, see the
Maps" section on page
Beginning in privileged EXEC mode, follow these steps to create a class map and to define the match
criterion to classify traffic:
Command
Step 1 configure terminal
Step 2
access-list access-list-number {deny |
permit} source [source-wildcard]
or
access-list access-list-number {deny |
permit} protocol source [source-wildcard]
destination [destination-wildcard]
or
mac access-list extended name
{permit | deny} {host src-MAC-addr mask
| any | host dst-MAC-addr | dst-MAC-addr
mask} [type mask]
Step 3
class-map [match-all | match-any]
class-map-name
Catalyst 3560 Switch Software Configuration Guide
28-40
"Classifying, Policing, and Marking Traffic by Using Policy
28-42.
Purpose
Enter global configuration mode.
Create an IP standard or extended ACL for IP traffic or a Layer 2 MAC
ACL for non-IP traffic, repeating the command as many times as
necessary.
For more information, see the
section on page 28-37.
When creating an access list, remember that, by default, the
Note
end of the access list contains an implicit deny statement for
everything if it did not find a match before reaching the end.
Create a class map, and enter class-map configuration mode.
By default, no class maps are defined.
• (Optional) Use the match-all keyword to perform a logical-AND
of all matching statements under this class map. All match criteria
in the class map must be matched.
• (Optional) Use the match-any keyword to perform a logical-OR
of all matching statements under this class map. One or more
match criteria must be matched.
• For class-map-name, specify the name of the class map.
If neither the match-all or match-any keyword is specified, the default
is match-all.
Note Because only one match command per class map is supported,
the match-all and match-any keywords function the same.
Chapter 28
"Classifying Traffic by Using ACLs"
Configuring QoS
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