[c-nsp] Performance issue on link

CiscoNSP List cisconsp_list at hotmail.com
Wed Apr 3 01:54:33 EDT 2013

Thanks Mikael - I have captured a wget with tcpdump, but Im not exactly sure what I should be looking for in wireshark....I see a LOT of "TCP segment of a reassembled PDU", a LOT of "Dup ACK's" and graph shows peaks of 25Mb...

In the other direction (another wget), I see very few (i.e. barely any) "TCP segment of a reassembled PDU", nor "Dup ACK's"

> Date: Wed, 3 Apr 2013 06:50:50 +0200
> From: swmike at swm.pp.se
> To: cisconsp_list at hotmail.com
> CC: cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Performance issue on link
> On Wed, 3 Apr 2013, CiscoNSP List wrote:
> > Im going to up a direct connection between the 2 linux boxes (by-passing 
> > the routers), and see if there is any improvement.
> The most productive thing for you to do instead of just blindly trying 
> things, is to actually do a tcpdump of your tcp traffic to a pcap file and 
> open this is wireshark and to a TCP stream analysis so you can actually 
> *see* what is going on.
> -- 
> Mikael Abrahamsson    email: swmike at swm.pp.se

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