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  • 1.  HP 5940 is not doing ARP

    Posted Dec 20, 2018 03:04 PM

    Weird situation

    The switch is configured with VLAN interfaces - nothing fancy. No matter what I do - I cannot see any ARP generated by the switch to resolve any IP under the VLAN. Once I do enter the entry manualy - all is working .

    If traffic is generated first from  the LAN host - the entry in the ARP table is fullfilled.

    Latest version of software in place 



  • 2.  RE: HP 5940 is not doing ARP

    Posted Dec 21, 2018 06:32 AM

    Hey.

    Sounds strange.

    have you tried debugging arp on the switch?

    Check your timer and see how long it is. Wait for the timeout with debugging enabled and check the messages.

     

    >display arp timer aging 
 Current ARP aging time is 1200 seconds
>
>debugging arp entry
>debugging arp packet
>debugging arp active-ack
>debugging arp fast-reply
>debugging arp error

    you should see stuff like

     

    ARP/7/ARP_SEND: Sent an ARP message, operation: 1, sender MAC: <mac-switch>, sender IP: <ip-switch>, target MAC: <mac-host>, target IP: <ip-host>
ARP/7/ARP_RCV: Received an ARP message, operation: 2, sender MAC: <mac-host>, sender IP: <ip-host>, target MAC: <mac-switch>, target IP: <ip-switch>
ARP/7/ARP_ENTRY: ARP entry status changed: MAC address: <mac-host>, IP address: <ip-host>, AGING -> NO_AGE

    Regards.

     



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