[c-nsp] asymmetrical performance inside core

[Eric A Louie]

I'm inheriting a problem that I could use some ideas to troubleshoot.

Speedtesting from within my core to other locations within the core give me 
"asymmetrical" performance. I've traced the routes and the path is the same 
download and upload, but I'll get very good download speeds (30Mbps) and 
terrible upload speeds (3Mbps, 6Mbps)

I've looked at MTU and it doesn't appear that there's a lot of packet 
fragmentation/reassembly

I've looked at total bandwidth utilization during the test times across the 
backhaul and I'm not saturating the bandwidth in either direction

I've looked at the interfaces through which the packets are traveling, and there 
are no CRC errors, no drops, no retransmissions

The physical layer radio transmissions seem to be good both directions with the 
performance testing at that level.

What do I look at next?  It's a problem because customers are speedtesting and 
seeing this DSL-like performance and making noises.

 Much appreciated,
Eric Louie