3com WX1200 3CRWX120695A Manuel D’Utilisation

C

HAPTER

 19: C

ONFIGURING

 

AND

 M

ANAGING

 S

ECURITY

 ACL

S

Table 34 lists the CoS values to use when reassigning traffic to a different 
priority. The CoS determines the MAP forwarding queue to use for the 
traffic when sending it to a wireless client. 

The easiest way to filter based on DSCP is to use the dscp codepoint 
option. The following commands remap IP packets from IP address 
10.10.50.2 that have DSCP value 46 to have CoS value 7 when they are 
forwarded to any 10.10.90.x address on Distributed MAP 4:

WX1200# set security acl ip acl2 permit cos 7 ip 10.10.50.2 
0.0.0.0 10.10.90.0 0.0.0.255 dscp 46
success: change accepted.
WX1200# set security acl ip acl2 permit any
success: change accepted.
WX1200# commit security acl acl2
success: change accepted.
WX1200# set security acl map acl2 ap 4 out
success: change accepted.

You also can indirectly filter on DSCP by filtering on both the IP 
precedence and IP ToS values of a packet. However, this method requires 
two ACEs. To use this method, specify the combination of precedence 
and ToS values that is equivalent to the DSCP value. For example, to filter 
based on DSCP value 46, configure an ACL that filters based on 
precedence 5 and ToS 12. (To display a table of the precedence and ToS 
combinations for each DSCP value, use the display qos dscp-table 
command.)

Table 34   Class-of-Service (CoS) Packet Handling

Background

1 or 2

Best effort

0 or 3

Video

4 or 5 

Voice

6 or 7