Forum Discussion

uni's avatar
uni
Icon for Altostratus rankAltostratus
Feb 09, 2012

Source IP decision in Performance HTTP virtual

Can I make a load-balancing decision based on the source IP address with a Performance HTTP or Performance Layer 4 virtual? As I see it, the decision is made as soon as the client SYN is received, whi...
application delivery
dev
devops
iRules
uni's avatar
uni
Icon for Altostratus rankAltostratus
Feb 09, 2012
Possibly, but http://support.f5.com/kb/en-us/solutions/public/8000/000/sol8082.html?sr=19200790l4 states that

 

the initial SYN request sent from the client to the BIG-IP LTM virtual server. The BIG-IP LTM makes the load balancing decision and passes the SYN request to the pool member.

 

So, at the point the load-balancing decision is made, there is no established connection so I guess it comes down to when an entry is inserted in the connection table - after the first SYN, after the SYN/ACK, or after the full handshake.