[c-nsp] Out of order queuing

Justin Shore justin at justinshore.com
Mon Sep 21 15:44:25 EDT 2009


chris.flav at yahoo.ca wrote:
> Hello,
> 
> We have a customer with load-balanced path to us.  TCP throughput is
> affected by some out-of-order packets, and we were looking for a way to
> queue the interface in order to try and mitigate this.  Is it possible
> to use any queueing mechanism to re-order packets received from this
> customer before transmitting them, even at the cost of latency?!
> 
> I tried experimentation with CBWFQ with little to no success.  Any tips?

Is a different load balancing algorithm possible here?  Perhaps 
flow-based load-balancing instead of packet-based would solve the 
problem.  Less throughput achieved per flow but it should balance itself 
out when you factor in all the other flows.  Plus no out-of-order packets.

Justin




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