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DMA_95966's avatar
DMA_95966
Icon for Nimbostratus rankNimbostratus
Jul 14, 2012

Inactive node taking traffic

Hello All,

 

 

I have one VIP setup in which i can see node is down , but it still taking traffic. As i know e default behavior of F5 HLB, when it detects that a node is down, is to route new requests to a known good node and let existing sessions continue to go to the known bad node . So Is there any way that to stop the traffic immediately. Is any irule or any specific setting that i can apply for desired result ?

 

 

 

Thanks, Deepak
management
monitoring

5 Replies

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jul 14, 2012
    can you try LB::status and reject command?

     

     

    LB:status wiki

     

    https://devcentral.f5.com/wiki/iRules.lb__status.ashx

     

     

    reject

     

    https://devcentral.f5.com/wiki/irules.reject.ashx
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Jul 14, 2012
    Another option is to set the 'action on service down' pool setting to 'reject' so TMM will send a TCP reset when the pool member is marked down by a monitor.

     

     

    Aaron
  • DMA_95966's avatar
    DMA_95966
    Icon for Nimbostratus rankNimbostratus
    Jul 14, 2012
    Hello Hoolio,

     

     

    thanks for the reply.

     

     

    could you please explain ? Do I need to create irule for this .
  • DMA_95966's avatar
    DMA_95966
    Icon for Nimbostratus rankNimbostratus
    Jul 27, 2012
    Issue: VIPs no longer passing external public IPs to servers

     

     

    I have vip setup , and using tool we are monitoring public ips form which traffic is coming to server. Since few days its stop working .I took tcpdumo using server ip and using tool I found that its showing only one ip form which traffic is coming to server. when I checked for that ip , I can see that ip is configured as snat. Any idea about this ?
  • DMA_95966's avatar
    DMA_95966
    Icon for Nimbostratus rankNimbostratus
    Jul 27, 2012
    Issue: VIPs no longer passing external public IPs to servers

     

     

    I have vip setup , and using tool we are monitoring public ips form which traffic is coming to server. Since few days its stop working .I took tcpdumo using server ip and using tool I found that its showing only one ip form which traffic is coming to server. when I checked for that ip , I can see that ip is configured as snat. Any idea about this ?