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AliFish's avatar
AliFish
Icon for Nimbostratus rankNimbostratus
May 13, 2015

Relation load balance with persistence

My English is very bad. I explain the situation, we use F5 to balance the traffic originated for users y destinated to internet.   On the F5 there are two routers, each with a link to the Internet...
Max_Q_factor's avatar
Max_Q_factor
Icon for Cirrocumulus rankCirrocumulus
May 13, 2015

If you have a load balancing method of something other than round-robin than the behavior may be normal.

 

A method like "least connections node" may produce those statistics because the F5 is making a load balancing decision based on the number of active layer 4 connections each time a new connection or session is being opened through the F5. This may be preferable as one ISP may get a lot of short lived connections, and the other ISP may end up with a lot of longer lived connections. So after some time it may appear that one ISP gets more traffic than the other, when in reality one ISP is getting more short lived connections but they are both load balancing roughly the same amount of layer 4 connections at any given time.