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

[Michael Lyngbøl]

On 02.06.2004 10:58:44 +0000, 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.

I would use an installation of FreeBSD and dummynet(4).

<http://www.freebsd.org/>
<http://info.iet.unipi.it/~luigi/ip_dummynet/>

/Michael

-- 
Michael Lyngbøl -- michael at lyngbol dot dk
Network Architect, AS3292 TDC, IP·backbone