Mad Router

Installation pas plus difficile que sous XP ou sous Linux.

Suivez les étapes suivantes :

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A new version of dynamips is release.

You can view here the changelog

Here is the procedure to upgrade from the last version.

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We have ever seen in a previous article how dynamips can BE AWESOME. Dynamips helps us to emulate the hardware part of a router, but what about PIX ??!
So we can use PEMU !!

You will be able to find in this article the way to use PEMU, and more important, the way to couple PEMU with dynamips in order to emulate an entire network.
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For 2 days, i’ve been working on a topology about inter-vlan routing, all in an emulated environment, Dyna(mips/gen) + two tap interfaces as my nodes.

tap0 in VLAN 2, tap1 in VLAN 3 , VLANs on the same switch ( 3660 + NM-16ESW as my switch), dot1q link between switch and router… bla bla bla

Well, it didn’t work, can’t ping each tap from another, so what’s going on ? I checked my configuration twice… then three times, then four…. then search for some tutorials about inter-vlan routing… ( oh my god :s ) but always the same problem…

So i’ve just check those two tap interfaces on the same switch trying to ping each from other!

debug ip packet , debug ip icmp… always nothing…

Why not try arping? let’s go, debup arp…. always no response…!

Well I finally capture the traffic… and what did i see ?

From both sides of the switch… no trace of any ARP response… the tap interface didn’t want to tell what was its MAC address to fill the CAM table

If any has an answer about this… I’m ready to hear it!

I know this blog do not deal with Microsoft products, but some of you want probably know how to install Dynamips and Dynagen under Windows XP.

The best way is to…

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Par défaut, Dynamips va prendre toutes vos ressources CPU lorsqu’il émule un ou plusieurs routeurs, un peu gênant quand vous faites plusieurs choses à côté et encore plus quand vous émulez 8 routeurs

Comment faire pour ajuster les besoins de dynamips autant en CPU qu’en RAM ?

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Si toi aussi tu es pauvre, tu dépenses tout tes sous dans ta scolarité à Supinfo , tu n’as pas les moyens de te payer un Lab CCNA, voir CCNP, et tu as envie de manger du router jusqu’à penser en binaire, alors cette article est fait pour toi.

Installons ensemble sous linux, Dynamips et Dynagen, 2 merveilleux outils symbiotes!

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