Cisco MadRouter Contest : Round Two

What is the TTL of this frame?

0000  00 18 39 32 5a be 00 14  38 1c aa b3 08 00 45 00   ..92Z... 8.....E.
0010  00 34 a1 12 40 00 40 06  40 a9 c0 a8 01 41 58 bf   .4..@.@. @....AX.
0020  3e 60 b9 5f 00 50 3d f5   fa f8 49 7f 44 59 80 10   >`._.P=. ..I.DY..
0030  01 d5 5f ce 00 00 01 01   08 0a 00 00 65 49 0e f2   .._..... ....eI..
0040  c7 5f                                                                           ._

Let’s check RFC ;)

Saturday, November 17th, 2007 CMC 5 Comments

Dynamips 0.2.8-RC2 release

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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Thursday, November 15th, 2007 Cisco, Emulation 1 Comment

PEMU - Pix EMUlation and Dynamips - windows

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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Saturday, November 10th, 2007 Cisco, Emulation 4 Comments

Cisco MadRouter Contest : Round One

Je vous présente à tous le Cisco MadRouter Contest.

Inspiré d’une idée originale de pello qui proposait des quizz sur son blog, je met en place ce contest qui aura pour but de déterminer quel lecteur de ce blog est le plus…

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Friday, November 9th, 2007 CMC, Cisco 2 Comments

RIPng basic configuration

The Routing Information Protocol next generation (RIPng) is…

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Thursday, November 8th, 2007 Cisco, Video 5 Comments

Comment créer une interface Microsoft Loopback

Une facon de sortir de l’environnement émulé de dyna(mips/gen) est de créer une interface Microsoft Loopback ( sous Windows ) pour avoir un accès à l’OS.

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Sunday, November 4th, 2007 Cisco, Video, Virtualization 7 Comments

The first three things to do…

… when you are a working on a training lab .

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Friday, November 2nd, 2007 Cisco No Comments

FREEBOX est morte VIVE CISCO SOHO 97

Quelle ne fut pas ma joie lundi en rentrant chez moi, de m’apercevoir que ma freebox faisait un bruit TROP CHELOU ET STRESSANT.
J’étais parti depuis 15 jours, dispenser des cours à nos amis chinois, ET quelques français.

Donc je rentre ma freebox fais des bruits qui font peur. Je débranche l’alim, je la rebranche, toujours pareil.. OK
Je vais emprunter une alim FREEBOX à un pote, pour m’apercevoir qu’au final c’est l’alim qui a rendu l’âme.

Donc j’envoie un mail général à tout SUPINFO Caen, pour voir si une âme charitable peut me prêter une alim freebox le temps que FREE m’en renvoient une.. (au passage j’ai du passer 20min sur la Hotline à 12456€ la minutes).

et la ..

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Wednesday, October 31st, 2007 Cisco 5 Comments

TAP Interface has a limitation ?

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!

Thursday, October 18th, 2007 Cisco, Emulation, Linux 1 Comment

X11 Forwarding

As SCTs, we have to use an Epson Projector to display our slides in Supinfo, unfortunately, it’s only Wind*ws compliant.

This night, I’ve just found a way to keep my laptop under Linux and use the Tablet PC in order to display my linux programs on the wall.

I connect the Tablet PC ( Windows XP ) to the Epson projector and use a ssh connection between my laptop and the Tablet PC to forward the X Window display.

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Saturday, October 13th, 2007 Linux 2 Comments

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