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  1. ONOS
  2. ONOS-6303

Incorrect traffic treatment from link collection intent compiler

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    • Story Points:
      1
    • Epic Link:
    • Sprint:
      K Sprint #2 - Northbound

      Description

      This will happened if two egress port exists in same device and one egress port need to pop VLAN.

      For example, it will generate [VLAN_POP, OUTPUT:1, VLAN_ID:300, OUTPUT:2], this threatment will cause OFBadAction error

      To resolve this problem, we need to order instructions, priority for each instructions:
      1. simple output (tag value doesn't changed)
      2. change tag value (set VLAN, set MPLS)
      3. change tag type (push/pop vlan, mpls)

      First two can be put in to treatment directly because they don't change tag type
      Third type might be more complex, for example:
      A packet without tag want to send to two output, one is VLAN 100, second is MPLS 10

      And we will get a treatment with these instructions:
      [VLAN_PUSH, VLAN_ID: 100, OUTPUT:1, MPLS_PUSH, MPLS_LABEL: 10, OUTPUT: 2]

      Correct instructions should be:
      [VLAN_PUSH, VLAN_ID: 100, OUTPUT:1, VLAN_POP, MPLS_PUSH, MPLS_LABEL: 10, OUTPUT: 2]

      To resolve this problem, we need to add additional "cleanup" instruction (e.g. VLAN_POP)

      Update:

      I found we can resolve this issue by setting "useFlowOptimization" to true

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            • Assignee:
              trtc008056 Yi Tseng
              Reporter:
              trtc008056 Yi Tseng
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