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Examples of QoS implementation
Issue 6 January 2008
335
 
Example 2: C-LANS cannot tag their traffic
Assumptions for Example 2
The C-LANs 192.168.1.10 and.11 cannot tag their traffic (TN-799C or earlier).
The configuration commands in 
 are applied only to the left router.
Administration commands for Example 2
Table 59: Administration commands for Example 2
Command
Meaning
1.access-list 101 permit 
ip host 192.168.1.10 
192.168.2.0 0.0.0.255
The command “access-list 101...” permits 
any IP traffic from the 2 C-LANs to the 
192.168.2.0/24 network. There is an 
implicit “deny any” at the end of this access 
list.
2.access-list 101 permit 
ip host 192.168.1.11 
192.168.2.0
 0.0.0.255
3.class-map match-any 
untaggedVoIP
Create a class map called “untaggedVoIP.”
4.match access-group 101
Packets that match access list 101 are in 
the class that is “untaggedVoIP.”
5.policy-map setDSCP
Create a policy map called “setDSCP.”
6.class untaggedVoIP set 
ip dscp 46
For all packets in the class “untaggedVoIP,” 
set the DSCP to 46.
7.interface Ethernet 0/0 
service-policy input 
setDSCP
Apply the “setDSCP” policy inbound on this 
interface.