Re: jitter testing

[Karsten Iwen <newsletter () saviya de>]

> i had problems on a 3750 with the command "show policy-map interface"
> there was a traffic-shaping configured - but the counters didn't change 
> the value (always zero) - with different s/w versions
> ideas here?

that's not the way it works on a Catalyst. QoS on Cisco Switches is 
completely different than QoS on Cisco Routers.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_44_se/configuration/guide/swqos.html

> if i want to get one-way jitter, can i do simply rtt/2 ?

no, perhaps the jitter is only in one direction?

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_44_se/configuration/guide/swipsla.html


> > > -----Original Message-----
> > > From: listbounce () securityfocus com 
> > > [mailto:listbounce () securityfocus com] On Behalf Of markus sesser
> > > Sent: 27. helmikuuta 2008 15:43
> > > To: security-basics () securityfocus com
> > > Subject: jitter testing
> > >
> > > Hi,
> > >
> > > Do anybody know how to measure delay variation (jitter) in layer2/3 
> > > networks?
> > > I'm looking for system- or freeware-tools to do this (no commercial 
> > > tools!).