Cisco 3550 Port Speed Limit Example

First, network description

The PC1 is connected to the Cisco3550 F0/1 and the rate is 1M;

The PC1 is connected to the Cisco3550 F0/2 and the rate is 2M;

CISCO3550 's G0/1 for export.

Second, the detailed configuration process

Note: Each interface supports only one policy, and one policy can be used for multiple interfaces. So the download rate limit for all PCs should be defined in the same policy (in this example

For Policy-map User-down), while the difference between PC rates is defined separately in Class-map.

1, on the switch to start QoS

Switch (config) #mls QoS//Start QoS on the switch

2, respectively define PC1 (10.10.1.1) and PC2 (10.10.2.1) Access Control List

Switch (config) #access-list permit 10.10.1.0 0.0.0.255//control PC1 uplink traffic

Switch (config) #access-list permit any 10.10.1.0 0.0.0.255//control PC1 downlink Traffic

Switch (config) #access-list permit 10.10.2.0 0.0.0.255//control PC2 uplink traffic

Switch (config) #access-list permit any 10.10.2.0 0.0.0.255//control PC2 downlink Traffic

3. Define the class and bind to the Access control list defined above

Switch (config) # Class-map user1-up//define PC1 Uplink class, and bind access list 10

Switch (config-cmap) # match Access-group 10

Switch (Config-cmap) # exit

Switch (config) # Class-map user2-up

Switch (config-cmap) # match Access-group 11//define PC2 Uplink class and bind access list 10

Switch (Config-cmap) # exit

Switch (config) # Class-map User1-down

Switch (config-cmap) # match Access-group 100//define PC1 downlink class, and bind access list 100

Switch (Config-cmap) # exit

Switch (config) # Class-map User2-down

Switch (config-cmap) # match Access-group 111//define PC2 downlink class, and bind access list 111

Switch (Config-cmap) # exit

4, define the policy, bind the class defined above to the policy

Switch (config) # Policy-map user1-up//define PC1 upstream rate of 1M

Switch (CONFIG-PMAP) # class user1-up

Switch (config-pmap-c) # Trust DSCP

Switch (config-pmap-c) # police 1024000 1024000 exceed-action drop

Switch (config) # Policy-map user2-up//define PC2 upstream rate of 2M

Switch (CONFIG-PMAP) # class user2-up

Switch (config-pmap-c) # Trust DSCP

Switch (config-pmap-c) # police 2048000 1024000 exceed-action drop

Switch (config) # Policy-map User-down

Switch (CONFIG-PMAP) # class User1-down

Switch (config-pmap-c) # Trust DSCP

Switch (config-pmap-c) # police 1024000 1024000 exceed-action drop

Switch (config-pmap-c) # exit

Switch (CONFIG-PMAP) # class User2-down

Switch (config-pmap-c) # Trust DSCP

Switch (config-pmap-c) # police 2048000 1024000 exceed-action drop

Switch (config-pmap-c) # exit

5, the application of the strategy on the interface

Switch (config) # interface F0/1

Switch (config-if) # Service-policy input user1-up

Switch (config) # interface F0/2

Switch (config-if) # Service-policy input user2-up

Switch (config) # interface G0/1

Switch (config-if) # Service-policy input User-down