FR WRED configuration example

As shown in Figure 50,

• Router A connects to Router B through an FR network.

• Configure WFQ for the FR PVCs of Router A and enable DSCP-based WRED.

• On PVCs of Router B, allocate bandwidth for packets with the specific DSCP values and enable DSCP-based WRED for these packets, and configure WFQ and the WRED policy for the other packets.

  Figure 50: Network diagram

  

1. Configure Router A:

   # Create traffic behavior wfqwred and configure WFQ and WRED actions in the behavior.

   [RouterA] traffic behavior wfqwred
   [RouterA-behavior-wfqwred] queue wfq queue-number 256
   [RouterA-behavior-wfqwred] queue-length 512
   [RouterA-behavior-wfqwred] wred dscp
   [RouterA-behavior-wfqwred] wred dscp af11 low-limit 5 high-limit 10 discard-probability 6
   [RouterA-behavior-wfqwred] wred dscp af21 low-limit 10 high-limit 20 discard-probability 8
   [RouterA-behavior-wfqwred] quit
   

   # Create QoS policy test and associate traffic behavior wfqwred with the default class default-class in the QoS policy.

   [RouterA] qos policy test
   [RouterA-qospolicy-test] classifier default-class behavior wfqwred
   [RouterA-qospolicy-test] quit
   

   # Create FR class frclass and apply QoS policy test to FR class frclass.

   [RouterA]fr class frclass
   [RouterA-fr-class-frclass] apply policy test outbound
   [RouterA-fr-class-frclass] quit
   

   # Configure FR-related parameters for interface Serial 2/1.

   [RouterA] interface Serial 2/1
   [RouterA-Serial2/1] link-protocol fr
   [RouterA-Serial2/1] fr map ip 192.168.1.2 60
   [RouterA-Serial2/1] ip address 192.168.1.1 255.255.255.0
   

   # Configure the maximum reserved bandwidth for queues on interface Serial 2/1.

   [RouterA-Serial2/1] qos reserved-bandwidth pct 70
   

   # Apply the FR class frclass to DLCI 60 of interface Serial 2/1.

   [RouterA-Serial2/1] fr dlci 60
   [RouterA-fr-dlci-Serial2/1-60] fr-class frclass
   

2. Configure Router B:

   # Create traffic class af11_31 and configure the class to match DSCP AF11 or AF31.

   <RouterB> system-view
   [RouterB] traffic classifier af11_31 operator or
   [RouterB-classifier-af11_31] if-match dscp af11
   [RouterB-classifier-af11_31] if-match dscp af31
   [RouterB-classifier-af11_31] quit
   

   # Create behavior afwred and configure AF and WRED actions in the behavior.

   [RouterB] traffic behavior afwred
   [RouterB-behavior-afwred] queue af bandwidth pct 50
   [RouterB-behavior-afwred] wred dscp
   [RouterB-behavior-afwred] wred dscp af11 low-limit 10 high-limit 40 discard-probability 15
   [RouterB-behavior-afwred] wred dscp af31 low-limit 10 high-limit 60 discard-probability 20
   [RouterB-behavior-afwred] quit
   

   # Create traffic behavior wfqwred and configure WFQ and WRED actions in the behavior.

   [RouterB] traffic behavior wfqwred
   [RouterB-behavior-wfqwred] queue wfq
   [RouterB-behavior-wfqwred] wred dscp
   [RouterB-behavior-wfqwred] wred dscp 0 low-limit 10 high-limit 20 discard-probability 8
   [RouterB-behavior-wfqwred] quit
   

   # Create QoS policy test, and associate the default class default-class with behavior wfqwred and class af11_31 with behavior afwred in the QoS policy.

   [RouterB] qos policy test
   [RouterB-qospolicy-test] classifier default-class behavior wfqwred
   [RouterB-qospolicy-test] classifier af11_31 behavior afwred
   [RouterB-qospolicy-test] quit
   

   # Create FR class frclass and apply QoS policy test to the class.

   [RouterB]fr class frclass
   [RouterB-fr-class-frclass] apply policy test outbound
   [RouterB-fr-class-frclass] quit
   

   # Configure FR-related parameters for interface Serial 2/2.

   [RouterB] interface serial 2/2
   [RouterB-Serial2/2] link-protocol fr
   [RouterB-Serial2/2] ip address 192.168.1.2 255.255.255.0
   [RouterB-Serial2/2] fr traffic-shaping
   [RouterB-Serial2/2] fr map ip 192.168.1.1 50
   

   # Configure the maximum reserved bandwidth for queues on Serial 2/2.

   [RouterB-Serial2/2] qos reserved-bandwidth pct 70
   

   # Apply FR class frclass to DLCI 50.

   [RouterB-Serial2/2] fr dlci 50
   [RouterB-fr-dlci-Serial2/2-50] fr-class frclass