Wired Intelligent Edge

 View Only
Back to discussions
Expand all | Collapse all

Aruba CX VSX Stack - KeepAlive on dedicated Interface - UDLD blocking

This thread has been viewed 13 times

  • 1.  Aruba CX VSX Stack - KeepAlive on dedicated Interface - UDLD blocking

    Posted Feb 16, 2026 05:00 AM
    Edited by PB62 Feb 16, 2026 05:44 AM

    I am in the process of deploying an Aruba CX 8360v2 (JL719C) VSX Stack as a streched Core.

    In want to use a dedicated 1G MMF Link for VSX KeepAlive. Naturaly i've configured UDLD on the LWL Link, but UDLD keeps blocking it. My guess is, because the Interface is configured as a Layer 3 (routing) UDLD as a Layer 2 protocoll does not work?

    Firmware: 10.16.1020 (LL.10.16.1020)

    If so, why does the firmware allow this configuration? Oversight or Bug?

    EDIT: without UDLD enabled, the Link / KeepAlive works fine.

    Config 

    vsx

        role primary
        keepalive peer 192.168.0.2 source 192.168.0.1 vrf keepalive

    vrf keepalive

    interface 1/1/48
        description VSX keepalive
        no shutdown
        vrf attach keepalive
        ip address 192.168.0.1/30
        udld
        apply fault-monitor profile all
        exit

    UDLD Status

    # show udld interface 1/1/48

    Interface 1/1/48
     Config: enabled
     State: active
     Substate: blocked
     Link: block
     Version: hpe anw
     Mode: forward then verify
     Interval: 7000 milliseconds
     Retries: 4
     Tx: 210 packets
     Rx: 0 packets, 0 discarded packets, 0 dropped packets
     Port transitions: 1



Related Content