Application Delivery (ADX)

Reply
N/A
Posts: 1
Registered: ‎10-10-2013

Older ADX, need help with SLB and Hyper-V

I have 3 real servers setup that are physical servers. I am trying to add some new Microsoft Hyper-V VM's to the real server list.

I have everything added, with ports bound to the virtual server (ADX) and healthchecks running.

I see the healthcheck request on the server logs. The ADX is showing the real server is active and the ports are active as well. What is odd, I see constant entries in the log as follows. Also notice the Packets Rx.  I am guessing this has something to do with the Hyper-V Host, but not sure what to look for.

Oct 10 12:42:48notification L4 server 192.168.1.121 R4CBatch01 port 65130 is up
Oct 10 12:42:44notification L4 server 192.168.1.121 R4CBatch01 port 65130 is down due to reassign
ServerStateCurrent
Session
ConnectionPktsBytesAvg FrameAgeReassign-
ments
NameIPCurrentPeakTotalRxTxRxTxRxTx
radweb01192.168.1.101active1882942120581763912419824124619117756711549111116932199925627191100
radweb02192.168.1.102active17768961590414523299248949129188742944994157634922927544488421800
radweb03192.168.1.107active188894446650151492972860385682061799011198261027203031869926613100
R4CBatch01192.168.1.121active2208110411044833403744025227606700
ServerStateCurrent
Session
ConnectionPktsBytesAvg FrameAgeReassign-
ments
NameIPCurrentPeakTotalRxTxRxTxRxTx
Contributor
Posts: 74
Registered: ‎08-18-2011

Re: Older ADX, need help with SLB and Hyper-V

Hi gsliver,

I think the issue is with the routing setup on the real server for the client IPs. It looks like the tcp syn is reaching to the server but server is either not replying to the syn (It is replying for healthchecks though) or the default gateway of server is configured in a way the syn-ack from server is not reaching to ADX.

The server port is going down due the reassign count feature which monitors for missing syn-acks replies for client syns sent to the server and if number of missing syn-acks reaches a threshold the port is marked as failed so that ADX can do healthchecks again and make it up.

Thanks & Regards,

Mohit Sahni

-Mohit Sahni

Join the Community

Get quick and easy access to valuable resource designed to help you manage your Brocade Network.

vADC is now Pulse Secure
Download FREE NVMe eBook