3.4.3 Setting of DSCP rewrite when minimum bandwidth monitoring is violated

The following describes how to perform minimum bandwidth monitoring (changing the DSCP for non-compliant frames) for certain types of flows.

Points to note

When frames are received, first flow detection is performed based on the destination IP address, and then bandwidth monitoring using a minimum bandwidth (min-rate) is performed. The DSCP value of a frame that does not comply is changed.

Command examples

1. (config)# ip qos-flow-list QOS-LIST3

   Creates a IPv4 QoS flow list (QOS-LIST3). By creating this list, IPv4 QoS flow list mode is entered.

2. (config-ip-qos)# qos ip any host 192.168.120.10 action min-rate 1M min-rate-burst 64 penalty-dscp 8

   Configures the IPv4 QoS flow list for flows whose destination IP address is 192.168.120.10.The command sets a minimum monitoring bandwidth of 1 Mbit/s, a minimum-monitoring-bandwidth burst size of 64 KB, and DSCP value of 8 for non-compliant frames in minimum bandwidth monitoring.

3. (config-ip-qos)# exit

   Returns to global configuration mode from IPv4 QoS flow list mode.

4. (config)# interface gigabitethernet 1/0/5

   Switches to the interface mode of port 1/0/5.

5. (config-if)# ip qos-flow-group QOS-LIST3 in

   Enables the IPv4 QoS flow list (QOS-LIST3) on the receiving side.