----- Original Message ----- From: "Priscilla Oppenheimer" To: Sent: 03 August 2002 1:47 pm Subject: RE: RIP/IGRP Routing Simulator? [7:50586]
> A protocol analyzer would let you generate packets. Capture some RIP and > IGRP updatess so you know what they look like, change and add network > numbers, and then send them out again. A good analyzer will recalculate the > IP checksum for you. (Also, the UDP checksum in the case of RIP). If the pc/microcomputer you were planning on using is expendable, you might consider putting a unix variant on it, as the range of available simulators is a bit larger. Both the simulator & the analyzer approach aren't much help with at least one part of the certification preparation process: altering configuration parameters on the cisco IS & verifying that the packet structure & content match the expectations you are developing. Even in the case of proprietary routing protocols, it remains an open question whether or not the behavior of the vendor's software & hardware match the descriptions set forth in the specification (As usual, the proprietary specifications themselves remain closed). In the case of allegedly open standards, enough details are left up to the vendor that this kind of hands-on research is essential in order to avoid hitting a tinted-glass ceiling as far as a deep understanding of networking is concerned, which is itself nearly essential when in the midst of a supply glut. I suspect the standards themselves are similarly partially disassociated with the principles that undergird them, but I lack examples. > Of course, if you could afford a good analyzer, you could afford some new > routers too, though! ;-) Does anyone know if the free analyzers like > Etherreal will let you generate packets? As far as ethereal is concerned, not as of the spring 2002 version. > Priscilla > > > Sparky Nelson wrote: > > > > What I am looking for is a Windows program that I can connect > > to a Cisco > > router that will send out RIP routing updates. Would love to > > send out a a > > group of 5 to 10different routes to illustrate routing without > > using > > loopback addresses. If I need to use loopbacks I will but would > > prefer the > > routes were coming into the rouing environment from an external > > source > > rather than an internal router. I figure it won't be hard to > > get a RIP > > simulator, I really don't expect to get anything that will send > > IGRP routing > > information because of the propritary nature of IGRP. > > > > Thanks, > > > > Kevin Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=50602&t=50586 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
