Configuring Redirection

Context

A device configured with the redirection action redirects the packets matching traffic classification rules to a specified interface, a GRE tunnel, an MPLS TE tunnel, a specified observing interface group, a Label Switching Path (LSP) or the CPU.

A traffic policy that contains redirection can only be applied in the inbound direction.

Procedure

1. Configure a traffic classifier.

   1. Run system-view

      The system view is displayed.

   2. Run traffic classifier classifier-name [ type { and | or } ]

      A traffic classifier is created and the traffic classifier view is displayed, or the view of an existing traffic classifier is displayed.

      and is the logical operator between rules in a traffic classifier, which means that:

      • If a traffic classifier contains ACL rules, packets match the traffic classifier only if they match one ACL rule and all the non-ACL rules.

      • If a traffic classifier does not contain any ACL rules, packets match the traffic classifier only if they match all the rules in the classifier.

      The logical operator or means that packets match a traffic classifier if they match one or more rules in the classifier.

      By default, the relationship between rules in a traffic classifier is or.

   3. Run if-match

      Matching rules are defined for the traffic classifier.

      For details about matching rules in a traffic classifier, see "Configuring a Traffic Classifier" in "MQC Configuration" of the CloudEngine 12800 and 12800E Series Switches Configuration Guide - QoS Configuration Guide.

   4. Run commit

      The configuration is committed.

   5. Run quit

      Exit from the traffic classifier view.

2. Configure a traffic behavior.

   1. Run traffic behavior behavior-name

      A traffic behavior is created and the traffic behavior view is displayed, or the view of an existing traffic behavior is displayed.

   2. Run the following commands as required.

      • Run redirect interface interface-type interface-number [ fail-action forward ]

        The device is configured to redirect packets matching the traffic classifier to a specified interface.

      • (Excluding the CE12800E equipped with ED-E, EG-E, and EGA-E series cards) Run redirect interface tunnel tunnel-id [ fail-action forward ]

        The device is configured to redirect packets matching the traffic classifier to a GRE/MPLS TE tunnel interface.

      • (For CE12800) Run redirect load-balance interface { tunnel tunnel-id [ weight weight-value ] } &<1-64>

        The device is configured to redirect packets matching the traffic classifier to multiple MPLS TE tunnel interfaces in a traffic behavior.

      • (For CE12800) Run redirect observe-port group group-id

        The device is configured to redirect packets matching the traffic classifier to a specified observing interface group. This action takes effect for only packets forwarded at Layer 2.

      • Run redirect cpu

        The device is configured to redirect packets matching the traffic classifier to the CPU.

        After the traffic policy containing redirect cpu is applied, the device redirects traffic matching traffic classification rules to the CPU, affecting system performance. Exercise caution when you run the redirect cpu command.

      • (For CE12800) Run redirect lsp public dest-address

        The device is configured to redirect packets matching the traffic classifier to the public LSP.

   3. Run commit

      The configuration is committed.

   4. Run quit

      Exit from the traffic behavior view.

   5. Run quit

      Exit from the system view.

3. Configure a traffic policy.

   1. Run system-view

      The system view is displayed.

   2. Run traffic policy policy-name

      A traffic policy is created and the traffic policy view is displayed, or the view of an existing traffic policy is displayed.

   3. Run classifier classifier-name behavior behavior-name [ precedence precedence-value ]

      A traffic behavior is bound to a traffic classifier in the traffic policy.

   4. Run commit

      The configuration is committed.

   5. Run quit

      Exit from the traffic policy view.

   6. Run quit

      Exit from the system view.

4. Apply the traffic policy.

   • The traffic policy containing redirection cannot be applied in the outbound direction.

   • For details about the configuration guidelines of applying traffic policies in different views on the CE12800, see Licensing Requirements and Limitations for MQC (CE12800).

   • For details about the configuration guidelines of applying traffic policies in different views on the CE12800E, see Licensing Requirements and Limitations for MQC (CE12800E).

   • For the CE12800 and the CE12800E equipped with FD-X series cards, run the display traffic-policy pre-state { global [ slot slot-id ] | interface { interface-type interface-number } | vlan vlan-id | bridge-domain bd-id } policy-name { inbound | outbound } command before committing the configuration to check the information about resources occupied by the traffic policy to be applied and determine whether the traffic policy can be successfully applied based on the information.

   • Applying a traffic policy to an interface

     1. Run system-view

        The system view is displayed.

     2. Run interface interface-type interface-number

        The interface view is displayed.

     3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the interface.

     4. Run commit

        The configuration is committed.

   • Applying a traffic policy to a VLAN

     1. Run system-view

        The system view is displayed.

     2. Run vlan vlan-id

        The VLAN view is displayed.

     3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the VLAN.

        The system applies traffic policing to the packets that belong to the VLAN and match traffic classification rules in the inbound or outbound direction.

     4. Run commit

        The configuration is committed.

   • Applying a traffic policy to the system or an LPU

     1. Run system-view

        The system view is displayed.

     2. Run traffic-policy policy-name global [ slot slot-id ] { inbound | outbound }

        A traffic policy is applied to the system or an LPU.

     3. Run commit

        The configuration is committed.

   • (For CE12800) Applying a traffic policy to a VSI

     1. Run system-view

        The system view is displayed.

     2. Run vsi vsi-name

        The VSI view is displayed.

     3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the VSI.

     4. Run commit

        The configuration is committed.

   • Applying a traffic policy to a QoS group

     1. Run system-view

        The system view is displayed.

     2. Run qos group group-name

        The QoS group view is displayed.

     3. Run the following commands as required:

        • Run the group-member interface { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-8> command to add interfaces to the QoS group.

        • Run the group-member vlan { vlan-id1 [ to vlan-id2 ] } &<1-8> command to add VLANs to the QoS group.

        • (For CE12800E) Run the group-member ip source ip-address { mask | mask-length } command to add source IP addresses to the QoS group.

     4. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the QoS group.

     5. Run commit

        The configuration is committed.

   • Applying a traffic policy to a BD

     1. Run system-view

        The system view is displayed.

     2. Run bridge-domain bd-id

        The BD view is displayed.

     3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the BD.

     4. Run commit

        The configuration is committed.

Verifying the Configuration

• Run the display traffic classifier [ classifier-name ] command to check the traffic classifier configuration.
• Run the display traffic behavior [ behavior-name ] command to check the traffic behavior configuration on the device.

• Run the display traffic policy [ policy-name [ classifier classifier-name ] ] command to check the traffic policy configuration.

• Run the display traffic-policy applied-record [ policy-name ] [ global [ slot slot-id ] | interface interface-type interface-number | vlan vlan-id | vsi vsi-name | vpn-instance vpn-instance-name | qos group group-id | bridge-domain bd-id ] [ inbound | outbound ] command to check the application records of a specified traffic policy.

  The CE12800E does not support the vsi vsi-name parameter.

• Run the display system tcam fail-record [ slot slot-id ] command to display TCAM delivery failures.
• Run the display system tcam service brief [ slot slot-id ] command to display the group index and rule count occupied by different services.
• Run the display system tcam service { cpcar slot slot-id | service-name slot slot-id [ chip chip-id ] } command to display IDs of entries delivered by services on the specified chip or in the specified slot.
• Run one of the following commands to display data of a traffic policy that has been applied:
  • display system tcam service traffic-policy { global | vlan vlan-id | interface interface-type interface-number | vsi vsi-name | vpn-instance vpn-instance-name | qos group group-id | bridge-domain bd-id } policy-name { inbound | outbound } [ slot slot-id [ chip chip-id ] ]

    The CE12800E does not support the vsi vsi-name parameter.

  • display system tcam service traffic-policy slot slot-id policy-name { inbound | outbound } [ chip chip-id ]
• (For the CE12800) Run the display system tcam match-rules slot slot-id [ [ ingress | egress | group group-id ] | [ chip chip-id ] ] ^* command to display matched entries.
• (For the CE12800E configured with FD-X series cards) Run the display system tcam match-rules slot slot-id [ [ ingress | egress | group group-id ] | [ delay-time time-value ] ] ^* command to display matched entries.
• (For the CE12800E configured with ED-E, EG-E, and EGA-E series cards) Run the display system tcam match-rules slot slot-id chip chip-id index index-id command to display matched entries.