Little easy challenge : HSRP

Posted on February 4, 2012 by clucas

Here it is a little challenge. You will find two CPE connected to two different PE. The two CPE are used in “fail-over” model by using HSRP. The two CPE dial on PE. CPEprimaire dials through a Bridge, CPESecondaire dials directly.

CPEPrimaire :
-------------
on LAN fastethernet:
standby 5 ip 10.0.0.1
standby 5 preempt
standby 5 track Dialer 1
standby 5 priority 105

CPESecondaire :
---------------
on LAN fastethernet :
standby 5 ip 10.0.0.1
standby 5 preempt

Do you think when link between PE75 and Bridge will be DOWN, HSRP will act as waited : PCs on LAN will have for gateway CPESecondaire ? You can shut interface WAN on bridge to try it. I enclosed GNS3 lab : hsrp-challenge.

Challenge OSPF / BGP

Posted on January 5, 2012 by clucas

Just to give you a new challenge. It is supplied by IPexpert.

The URL is : http://blog.ipexpert.com/2012/01/04/ospf-and-bgp-puzzle/

Have fun with this new challenge. For real, it is not really hard 😉

IOS-XE and ASR 903

Posted on December 6, 2011 by clucas

In reading Cisco France blog, I have discovered this platform : ASR903.

Thank you for the blog post from Jerome Durand (Cisco) about IOS-XE (v3.5) which will be running on ASR903. This piece of hardware is not already sold by anyone, even Cisco. This router seems really powerful in a compact place in your rack. Read it :

MPLS-TE
MPLS-TP
MPLS-OAM
Hierarchical VPLS (HVPLS), Virtual Private Wire Service (VPWS), EoMPLS
OTV
in addition to basical functionality.

Finaly, I like this plateform ! You can read the datasheet here.

Note : ASR901 already exists, but is not running with IOS-XE.

@clucas is playing with UC320W

Posted on November 10, 2011 by clucas

I have received at work this Cisco Small Business units to test it b efore we can sell it to customers.

It seems really well. It is well designed (some linux distro is behind), and customized. I love all these features and smart/quickly applied and in action.

UC320W is a good prodoct for Small business office.

How do you explain Internet/BGP/ASN to your non-IT friends ?

Posted on October 19, 2011 by clucas

It is not really easy to explain BGP/ASN concepts to a non-friendly-IT friend. I am really interested in how you explain this. Just to know. I am really curious.

Do you use an analogy ? Which ? Do you go directly in technical stuff ?

To begin : for my part I use an analogy around city/country. I explain that city/country announce to others her streets or better a set of streets. and so on …

It could be cool to know your stories about this…

CCIE Challenges

Posted on September 30, 2011 by clucas

It is not from me, but I find this challenges really interesting …

I really like ipexpert content (blog). I think I will use some of their stuff, when CCIE R&S Written and lab journey will begin (after CCIP and last exam : 642-642 (QoS)).

Some new toys …

Posted on September 20, 2011 by clucas

Some new toys (C7201 and C6506/sup720) to deploy in different datacenters 🙂

The first one to be prepared to CCIE Written.

Posted on August 11, 2011 by clucas

Yesterday, I received the first one of a CCIE book’s series. So, I received : “CCIE Routing and Switching (certification guide)”. 1080 pages to study networking technologies deeper toward CCIE Written (350-001) exam. I can’t wait to open this book and other (TCP/IP vol 1 and 2 (to buy)) to study.
But before, I must finish Qos Exam (642-642), the last part of my CCIP studies. After reading table of contents of CCIE cert guide, I am really happy to have choosen CCIP course before test my knowledge against CCIE…

Qos, MPLS, BGP studies/knowledge acquired during CCIP will be great appreciated for CCIE studies 🙂

Answer to Gandi BGP problem stuff

Posted on June 20, 2011 by clucas

To answer to BGP problem about BGP and static route (big subnet) to Null 0 : http://lacuisinedegandi.net/post/2011/06/20/Quand-Null0-et-BGP-peuvent-causer-probleme.

A solution can be :

R2#sh run | inc track
track 10 ip route 217.169.255.1 255.255.255.255 reachability
ip route 217.169.240.0 255.255.240.0 Null0 track 10

Where 217.169.255.1 would be IP of loopback IP address of an iBGP/Transit eBGP router. So that, if it is unreachable, static route to 217.169.240.0/20 will be removed and announcement to an eBGP neighbor will not be sent.

Blog deserted : some news

Posted on June 4, 2011 by clucas

This blog seems deserted since one or two months. There are some reasons about this. First of all :

The death of my mother. 14 months after my father, she is gone… I don’t have enought words and want to talk about it here.
God bless them and gives us a little happiness in these dark times of life (The grandfather of my wife also died in the last two weeks).

Second, I have passed 642-691(BGP+MPLS) in these two last months. So I have hard studied on it. Next : Qos (642-642) and I will be CCIP certified.