Справочник Пользователя для Cisco Systems 3750E
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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 36 Configuring QoS
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.
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
command. For more information, see the
and the
Beginning in privileged EXEC mode, follow these steps to create a class map and to define the match
criterion to classify traffic:
criterion to classify traffic:
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
access-list access-list-number {deny |
permit} source [source-wildcard]
permit} source [source-wildcard]
or
access-list access-list-number {deny |
permit} protocol source [source-wildcard]
destination [destination-wildcard]
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]
| any | host dst-MAC-addr | dst-MAC-addr
mask} [type mask]
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.
ACL for non-IP traffic, repeating the command as many times as
necessary.
For more information, see the
.
Note
When creating an access list, remember that, by default, the
end of the access list contains an implicit deny statement for
everything if it did not find a match before reaching the end.
end of the access list contains an implicit deny statement for
everything if it did not find a match before reaching the end.
Step 3
class-map [match-all | match-any]
class-map-name
class-map-name
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.
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.
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.
is match-all.
Note
Because only one match command per class map is supported,
the match-all and match-any keywords function the same. See
the
the match-all and match-any keywords function the same. See
the
for limitations when using the match-all and the
match-any keywords.