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tux143's avatar
tux143
Icon for Cirrus rankCirrus
Sep 26, 2019

F5 node health Unknown (Enabled)

We have LTM 10200 and everything was good and happy until recently we noticed when we add nodes in LTM then icmp check gos unknown and that node never turn green

 

Find attach screenshot. we are running LTM version 12.0.0

 

application delivery
BIG-IP
LTM
monitor
  • Samir's avatar
    Samir
    Icon for MVP rankMVP
    Sep 26, 2019

    Can you try to ping from BIG_IP to Node, Looks like node is not responding. Try to capture the tcpdump and see if any blockage[L3 Device]. Hope it will give some clue

  • Seçkin's avatar
    Seçkin
    Icon for Cirrus rankCirrus
    Sep 26, 2019

    Probably your bigip can not reach to the node or node is not functional. Try ping from BIG-IP or take a packet capture like;

     

    tcpdump -nni 0.0 host_ip and icmp

     

  • tux143's avatar
    tux143
    Icon for Cirrus rankCirrus
    Sep 26, 2019

    Ping is working fine, i have many other nodes working in same subnet, if i take same node and put it in other pair of F5 it works in same LAN subnet but for LTM10200 its not working (we have around 200 nodes in this F5). I can 100% guarantee that its not ping issue or network connectivity issue.

     

    Some official F5 documents suggesting its bigD service issue and may impacting monitoring and they suggest restarting bigd service but i am worried to do that in production.