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Thiyagu_343098's avatar
Thiyagu_343098
Icon for Nimbostratus rankNimbostratus
Mar 19, 2018

BIP-IP LTM to go in standby/Standby mode

Hello All, We have two LTM devices configured in HA pair. We were doing maintenance activity to move the HA connectivity from one switch to anonther switch. The moment we remove the cable connectivity of HA both LTM devices went to standy/standby state.

 

could you please help me to know what are all the possible causes fo the LTM devices in HA pair, to go standy/standby state?

 

In addition could also help me to what are the steps will follow in the event of HA link down and how the system reacts for the HA link down? Regards, Thiyagu

 

application delivery
BIG-IP
LTM

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  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Mar 19, 2018

    How is configured failover in device management / devices / failover?

     

    Is there only one failover network defined?

     

    If you are changing switch, you can temporarily add another failover network like management interface

     

    If you loose connectivity, both appliances will be active, which can make some IP address conflicts!

     

  • Evan_Thompson's avatar
    Evan_Thompson
    Icon for Cirrus rankCirrus
    Mar 19, 2018

    Hi.

     

    Haven't you configured "VLAN failsafe" and the action is "Failover" on your HA connectivity? If so, when vlan failover occurred in the situation, LTM will be Standby/Standby. Also, Are there any node that can arp respond from the bigip on another switch you said? If no device to reply arp respond on your network, it might cause Standby/Standby. Hope to resolve your problem.