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JoeReid's avatar
JoeReid
Icon for Nimbostratus rankNimbostratus
Nov 06, 2019

frame check error

When I run the following "tcpdump -s0 -X -nnn -vvv -i (vlan interface)" , there is an output identifying frame check errors. It raises two questions.

1. Is this normal behaviour

2. Does it have an effect on the operability of the loadbalancer?

 

TIA

 

application delivery
LTM

2 Replies

  • Lucern's avatar
    Lucern
    Icon for Nimbostratus rankNimbostratus
    Nov 07, 2019

    I'm guessing your devices are connected 1G or greater, correct?

     

    Make sure everything is set to Auto/Auto, long gone are the days where you need to hard set ports

    Check all cables involved - Swap em until you no longer get the errors

    If you're still getting errors swap SFPs

    If that doesn't work try another switch port, they DO go bad once in a while

    Not likely but possible bad port on the F5. Try another (might be hard to do without re-config though)

     

    My money is on one of the first three..

     

    And no, it's not normal and if you're getting a ton it can cause issues since you'll start getting a lot of retransmits..

     

    Good luck!