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a_basharat_2591's avatar
a_basharat_2591
Icon for Nimbostratus rankNimbostratus
May 26, 2016

In/Out Traffic Statistic on F5-LTM in HA mode

Hi,

 

I've got a HA pair, one acting as Active and one as Standby. I have set up a Virtual Server [VS-IP] for SSH sessions using port 22, so the F5 Load balances the requests to the VS-IP throughout the Servers behind.

 

When I have a look to the Traffic Statistic generated, under Statistic>>Module Statistic>>Local traffic>>Pools , What I see is:

 

  • On the Active one I can see something like:

 

and for the Standby is:

 

 

the Question that springs to my mind is:

 

  • The column IN and OUT are: In from the F5 to the Server and OUT from the Server to the F5, or is it the other way around?
  • Why the Active one has got traffic on the OUT Column, if potentially is on Standby mode and therefore not sending/receiving traffic?

Thanks.

 

application delivery
BIG-IP
devops
LTM
  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    May 26, 2016

    Hi,

     

    IN is for Peer to F5 and OUT stand for F5 to the peer. I think that the OUT should include the monitoring traffic. You have traffic initiated from peer to F5 on the active unit only.

     

  • Yann_Desmarest_'s avatar
    Yann_Desmarest_
    Icon for Nacreous rankNacreous
    May 26, 2016

    Hi,

     

    IN is for Peer to F5 and OUT stand for F5 to the peer. I think that the OUT should include the monitoring traffic. You have traffic initiated from peer to F5 on the active unit only.

     

    • a_basharat_2591's avatar
      a_basharat_2591
      Icon for Nimbostratus rankNimbostratus
      May 26, 2016
      OK thanks, understood, So IN/OUT shoul be looked from the F5 perspective: In [traffic comming to the F5], OUT [traffic leaving the F5]. What still baffle me is the fact that the Standby is registering traffic toward the Servers. And they are the same statistics as on the Active Peer.
  • Yann_Desmarest's avatar
    Yann_Desmarest
    Icon for Cirrus rankCirrus
    May 26, 2016

    Hi,

     

    IN is for Peer to F5 and OUT stand for F5 to the peer. I think that the OUT should include the monitoring traffic. You have traffic initiated from peer to F5 on the active unit only.

     

    • a_basharat_2591's avatar
      a_basharat_2591
      Icon for Nimbostratus rankNimbostratus
      May 26, 2016
      OK thanks, understood, So IN/OUT shoul be looked from the F5 perspective: In [traffic comming to the F5], OUT [traffic leaving the F5]. What still baffle me is the fact that the Standby is registering traffic toward the Servers. And they are the same statistics as on the Active Peer.