[c-nsp] Performance issue on link

CiscoNSP List cisconsp_list at hotmail.com
Tue Apr 2 20:24:51 EDT 2013

Tried lowering it to 35 + 30M, made no difference unfortunately.

udp in both directions is fine, tcp in one direction is fine(well acceptable), but in the other direction not good.

Im going to up a direct connection between the 2 linux boxes (by-passing the routers), and see if there is any improvement.

Thanks again for everyones assistance. 

> Date: Tue, 2 Apr 2013 05:37:43 +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 Tue, 2 Apr 2013, CiscoNSP List wrote:
> > class-map match-any MATCH_ANY match any
> >
> > policy-map 40MB_SHAPE
> > class MATCH_ANY
> >  shape average 41943040
> Try lowering this to 35 megabit/s to make sure you avoid the policer your 
> provider has in place.
> When you do the tcp testing, do a packet capture on the servers and look 
> for packet loss. Wireshark has excellent TCP analysis tools that can show 
> you exactly what's going on, if the problem is maxed out TCP windows or if 
> it's caused by TCP saw-toothing due to packet loss.
> -- 
> Mikael Abrahamsson    email: swmike at swm.pp.se

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