[nsp] I need ideas on how to simulate a 200ms round-trip latencyand bandwidth limitation.

[Craig Spiers]

As far as im awear, this will only affect data originating from the router,
not through it..

cheers

----- Original Message ----- 
From: "Brian Vowell" <brian at digitalix.net>
To: <cisco-nsp at puck.nether.net>
Sent: Wednesday, June 02, 2004 9:13 PM
Subject: Re: [nsp] I need ideas on how to simulate a 200ms round-trip
latencyand bandwidth limitation.


> On the same topic...
>
> Anyone have much experience with what Cisco calls Long Fat Networks
> (LFN)?  Specifically, I'm interested in the impact (if any) of
> implementing the "ip tcp window-size" command on a 1721 router.
>
> We have several VSAT links overseas, and I'm thinking of pushing the ISP
> on the US side to implement this feature on their routers, but I want to
> be sure that it'll have an impact on performance.  The Cisco docs
> suggest setting the value to 750000, but don't go into much detail about
> how they arrive at that figure.
>
>
> --b
>
> Goldberg Alain (IT) wrote:
>
> >Thanks Brian,
> >
> >I need to conduct all the test localy here, as we want to see the
> >behavior of rather heavy servers when they are not connected on the same
> >LAN.
> >Thank you anyway, I think I'll go for the
> >http://info.iet.unipi.it/~luigi/ip_dummynet/
> >
> >That was suggested.
> >
> >Thank you all.
> >
> >________________________________________________________________________
> >________________________________________________________________________
> >_________________
> >Alain Goldberg - Network manager - CCDA/CCNA AGG-RIPE - Tower
> >Semiconductors LTD.    Tel : 972-4-6506003 Fax : 972-4-6547788 Cell:
> >972-64-209662
> >________________________________________________________________________
> >________________________________________________________________________
> >_________________
> >
> >
> >
> >-----Original Message-----
> >From: Brian Vowell [mailto:brian at digitalix.net]
> >Sent: Wednesday, June 02, 2004 11:25 AM
> >To: Goldberg Alain (IT)
> >Cc: cisco-nsp at puck.nether.net
> >Subject: Re: [nsp] I need ideas on how to simulate a 200ms round-trip
> >latency and bandwidth limitation.
> >
> >I have some routers at the other end of an 800ms link.  What kind of a
> >test are you going to run?
> >
> >
> >--b
> >
> >Goldberg Alain (IT) wrote:
> >
> >
> >
> >>Hi all,
> >>
> >>I need to do some software tests between our main site and equipment
> >>that will be collocated some 200ms from here.
> >>I'd like to simulate the latency and some bandwidth limitation - let
> >>
> >>
> >say
> >
> >
> >>256Kbps.
> >>
> >>The testing equipment I have on-hands is:
> >>A couple of 250x routers, ( I tough to put them with serials back to
> >>back but can't find the Female V35 cable and it will not create the
> >>desired latency anyway).
> >>A 2600 router with a couple of ethernets and one serial port.
> >>An old 4500 router (enterprises image) .
> >>
> >>A few 2924, 2950, 3550 switches
> >>
> >>A few 6500's  (enterprises image) that are in production - so I can't
> >>play much with them - let say I can make changes on a specific
> >>
> >>
> >interface
> >
> >
> >>- but not global changes.
> >>It has only ethernet ports.
> >>
> >>A VPN-3006, and a couple of VPN's 3002.
> >>
> >>A few AP-350's access points.
> >>
> >>Please guys ... Be creative.
> >>
> >>Thanks.
> >>
> >>_______________________________________________________________________
> >>
> >>
> >_
> >
> >
> >>_______________________________________________________________________
> >>
> >>
> >_
> >
> >
> >>_________________
> >>Alain Goldberg - Network manager - CCDA/CCNA AGG-RIPE - Tower
> >>Semiconductors LTD.    Tel : 972-4-6506003 Fax : 972-4-6547788 Cell:
> >>972-64-209662
> >>_______________________________________________________________________
> >>
> >>
> >_
> >
> >
> >>_______________________________________________________________________
> >>
> >>
> >_
> >
> >
> >>_________________
> >>
> >>
> >>
> >>_______________________________________________
> >>cisco-nsp mailing list  cisco-nsp at puck.nether.net
> >>https://puck.nether.net/mailman/listinfo/cisco-nsp
> >>archive at http://puck.nether.net/pipermail/cisco-nsp/
> >>
> >>
> >>
> >>
> >
> >
> >
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