ExtremeSwitching (EXOS)

  • 1.  VLAN statistics no Tx on some of VLANs

    Posted 10-28-2021 04:31
    Hello!

    X590, EXOS 30.7.2.1 patch1-20
    Configured VLAN statistics with 
    configure ports 12 monitor vlan XXX
    configure ports 23 monitor vlan YYY
    But show vlan statistics on VLAN XXX don't showing Tx traffic:

    ACL slices available:
    # show access-list usage acl-slice port 12
    Ports 1-24, 29, 33
    Stage: INGRESS
    Slices:          Used: 5  Available: 7
    Virtual Slice  * (physical slice  0) Rules:   Used:      0  Available:   1024
    Virtual Slice  * (physical slice  1) Rules:   Used:      0  Available:   1024
    Virtual Slice  * (physical slice  2) Rules:   Used:      0  Available:   1024
    Virtual Slice  * (physical slice  3) Rules:   Used:      0  Available:   1024
    Virtual Slice  * (physical slice  6) Rules:   Used:      0  Available:    512
    Virtual Slice  * (physical slice  7) Rules:   Used:      0  Available:    512
    Virtual Slice  * (physical slice  8) Rules:   Used:      0  Available:    512
    Virtual Slice  7 (physical slice  4) Rules:   Used:      4  Available:    508 VLAN statistics
    Virtual Slice  8 (physical slice 10) Rules:   Used:      6  Available:    506 system
    Virtual Slice  9 (physical slice 11) Rules:   Used:      2  Available:    510 system
    Virtual Slice 10 (physical slice  5) Rules:   Used:     10  Available:    502 user/other
    Virtual Slice 11 (physical slice  9) Rules:   Used:     31  Available:    481 user/other
    Stage: EGRESS
    Slices:          Used: 2  Available: 2
    Virtual Slice  * (physical slice  0) Rules:   Used:      0  Available:    256
    Virtual Slice  * (physical slice  1) Rules:   Used:      0  Available:    256
    Virtual Slice  2 (physical slice  2) Rules:   Used:      4  Available:    252 VLAN statistics
    Virtual Slice  3 (physical slice  3) Rules:   Used:     17  Available:    239 user/other
    Stage: LOOKUP
    Slices:          Used: 0  Available: 4
    Virtual Slice  * (physical slice  0) Rules:   Used:      0  Available:    512
    Virtual Slice  * (physical slice  1) Rules:   Used:      0  Available:    512
    Virtual Slice  * (physical slice  2) Rules:   Used:      0  Available:    512
    Virtual Slice  * (physical slice  3) Rules:   Used:      0  Available:    512
    Stage: EXTERNAL

    When try to # configure ports 12 monitor vlan XXX tx-only - no results = no Tx traffic in VLAN statistics

    After checks, it was found that TX traffic is not shown on those vlan-s that have an IP interface and have only one port. 
    In addition, if it has an IP interface in the vlan, but this vlan is present on multiple ports and devices on these ports exchange traffic with each other, TX counts.
    It looks like the TX counter do not get the traffic generated by the switch itself.

    Could you please help - at which way to think?​

    Thank you!


  • 2.  RE: VLAN statistics no Tx on some of VLANs
    Best Answer

    Posted 10-29-2021 06:39
    Hello!

    It's expected behavior.
    It's mentioned in User Guide "Packets originating from the switch's CPU or forwarded by the CPU may not be reflected in transmit statistics" and checked in lab.