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SivaYenduri's avatar
SivaYenduri
Icon for Cirrus rankCirrus
Feb 28, 2020

Troubleshooting traffic spike on loadbalancer

Hello All,   Can someone help me how can i troubleshoot this issue?   Customers are accessing a VIP:8080 and there are around 2k connections on the VIP. But at 10:00AM CET everyday, connecti...
application delivery
BIG-IP
LTM
  • rafaelbn's avatar
    rafaelbn
    Feb 28, 2020

    Hello Siva!

    Do you happen to know the source IP of all those connections?

    I would start by looking at the connection table during that spike. Something like this...

    tmsh show sys connection cs-server-addr <VIP> cs-server-port 8080

    If everything comes from the same IP it could possibly narrow your tshoot down to a specific client.

    Best of luck!

F5SJ_'s avatar
F5SJ_
Icon for Altocumulus rankAltocumulus
Feb 28, 2020

Please run bigtop -n from bash, it will show you VIPs with highest number of connections. Then please check the timeout value of tcp profile assigned to the VIPs. I faced the same issue and I reduced the timeout value of tcp profile and I saw that all long running connections deleted from the connection table.