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Jaime_Quiroga_4's avatar
Jaime_Quiroga_4
Icon for Nimbostratus rankNimbostratus
Feb 28, 2013

DISCONECT VIRTUAL SERVER

 

It is presenting intermittent connections that are set against a virtual server, a catch was made and some time shows connection occurs and at any moment the connection is not made.

 

 

Tests have been conducted to establish telnet connections to port 80 from the server 172.22.175.116, 172.22.175.116 with virtual server, telnet 10 tests that are performed mitan respond and half not. Attached catch made in the balancer.

 

 

This is a sample of the catch

 

 

39 84.892341 172.22.175.116 172.22.175.206 TCP 70 61687 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1

 

40 87.873576 172.22.175.116 172.22.175.206 TCP 70 61687 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1

 

41 93.881259 172.22.175.116 172.22.175.206 TCP 66 61687 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1460 SACK_PERM=1

 

42 99.183575 172.22.175.116 172.22.175.206 TCP 70 61693 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1

 

43 99.183598 172.22.175.206 172.22.175.116 TCP 70 http > 61693 [SYN, ACK] Seq=0 Ack=1 Win=4380 Len=0 MSS=1460 WS=1 SACK_PERM=1

 

44 99.183890 172.22.175.116 172.22.175.206 TCP 60 61693 > http [ACK] Seq=1 Ack=1 Win=131328 Len=0

 

45 105.069812 172.22.175.116 172.22.175.206 TCP 60 61693 > http [FIN, ACK] Seq=1 Ack=1 Win=131328 Len=0

 

 

 

management
monitoring

5 Replies

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Mar 01, 2013
    what profile is the virtual server using? is it tcp profile or fastl4 profile?

     

     

    if it is fastl4, can you capture both sides of connection (client-side and server-side)?

     

    tcpdump -nni 0.0:nnn -s0 -w /var/tmp/output.pcap host 172.22.175 or host y.y.y.y and port 80

     

    y.y.y.y is pool member ip
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Mar 01, 2013
    where did you run tcpdump? was it on bigip?

     

     

    what tcpdump command did you use?
  • Jaime_Quiroga_4's avatar
    Jaime_Quiroga_4
    Icon for Nimbostratus rankNimbostratus
    Mar 01, 2013
    hi

     

     

    this is all the command used "tcpdump -i 0.0 host 172.22.175.116 ",

     

     

    This is the 2400 with the product VIPRION VCMP, allowing eight Balancers deploy virtualized and these settings are configured in HA, a couple of Guest GES2 called GES1 and where the first is the balancer is active and where it is presenting the intermittency described earlier, this is in version 11.1 Hotfix 5.
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Mar 01, 2013
    Hi James,

     

     

    On a tangent, it would be good to upgrade to 11.2.1 with the latest hotfix to get the latest vCMP fixes.

     

     

    Aaron