No matter how well planning is attended to; life is good at challenging that. It’s a little late but here it is. I am very pleased to announce the SP Handbook is now available for purchase.
Routing-Bits Handbook SP
Archive for the ‘CCIE SP’ Category
Cisco and their inconsistencies
January 30, 2012Cisco is known for the inconsistencies between platforms and different IOS versions. I came across another that was rather annoying. Now between linecards.
Trying to configuring the following standard sub-interface Ethernet AToM tunnel on a Cisco 7606 with a ES+ linecard:
pseudowire-class CISCO encapsulation mpls ! interface Te2/2.2 encapsulation dot1Q 2 no ip redirects no ip directed-broadcast no ip proxy-arp xconnect 10.5.0.99 12345 encap mpls pw-class CISCO
Yields the following misleading error…
7606(config)#int te2/2.2 7606(config-subif)# xconnect 10.5.0.99 12345 encap mpls pw-class CISCO MPLS encap is not supported on this circuit
CCIE-SP OEQ
March 2, 2011So the rush is on, for the last bunch of guys to try their luck at the CCIE-SP version 2 before the much awaited version 3 kicks off in April. I have had a fair amount of emails recently for tips and advice. Strangely enough guys are still worried about the OEQ.
In all honesty, if you studied the theory and you understand what happens when you typing in a command, then the OEQ is easy. At least that was my impression at both my CCIEs.
This post should ease most of your worry about the OEQ and what to expect.
How/What to prepare for the OEQ?
Where can you find this?
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Congrats to Thabo, CCIE #27635 (SP)
December 7, 2010Thabo Molefe, a friend and ex-colleague, is one of those special people that decided to take the difficult road, by attempting the CCIE SP first instead of the R&S. He has worked on the SP as long as I have known him. Last week his hard work and determination paid off, when he passed the CCIE SP on the mobile lab and earned his number CCIE #27635.
I took the easy road by doing the R&S first then the SP. So Thabo deserves the necessary respect for passing the SP first… Well done buddy :)
Thabo’s feedback:
“I just want to thank you for your assistance in achieving my goal of obtaining the CCIE certification. I successfully passed the CCIE SP in Johannesburg last week. Your notes and the assistance on the certification are precise and I would recommend them to all other engineers who are pursuing the SP certification.
I hope to get the CCIE Routing-Bits handbook for R&S next year when I will be pursuing the certification. Thank you again Ruhann.”
CCIE SP version3 is coming April 2011
October 20, 2010The long awaited announcement has finally come.
The CCIE Service Provider certification both written and lab exams will have the updated version 3.0 kick off on the 18th April 2011.
Cisco has made an official announcement here.
As expected all will be updated. A detailed breakdown of the technology topics (link), Hardware platforms and Software versions will also be changed (link)
A vague technology list (very similar to version2) has been posted. Hopefully a expanded version will be released soon.
See the below for the full break down
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Terminal Server in Dynamips
September 28, 2010I find using a terminal server to connect to routers while labbing very efficient. I personally don’t like having 10 windows open when configuring devices. I tried it back when I started studying for my R&S but found I made more errors than worth. Since then I have gotten used to jumping between terminal sessions on one screen.
Like most I used Dynamips when I studied for the SP. I built a quad-core PC at home with Ubuntu. My laptop at the time was running Windows XP, but during my 4 months trial I got a Mac Book Pro. Obviously I had to study whenever I had time regardless of the platform. So I configured the same setup across all three platforms.
Configuring a terminal server in Dynamips requires a real interface to be bridged to a virtual router interface. This is done by using a loopback interface. This is done very differently on the three platforms:
- Windows XP (32-bit)
- Ubuntu 9.10 (64-bit)
- Snow Leopard 10.6 (32/64-bit)
The .NET file I used for the Internetwork Expert SP labs are at the bottom of the article.
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VRF-lite route leaking
September 13, 2010The purpose of VRF-lite is to extend the logical separation of two different networks from a MPLS network down to a single CE router, connected to both these networks. It’s called VRF-lite because it is done without running MPLS (LDP/TDP) or MP-BGP between the PE and CE. Traffic is mapped to the VRF assigned to the ingress interface on the CE router.
But VRF-lite could be used without connecting to a MPLS network entirely! Consider what a VRF is?
A VRF is a mechanism used to provide logical separation between routing tables on the same router. It is locally significant to the router. Each interface on a router can only be assigned to one VRF, but a VRF can have multiple interfaces.
So VRF-lite could be used to separate multiple networks using the same equipment. (Not exactly something you should ever plan in a design, but it could be useful to know)
Once you have the separation you needed, you might need a way to selectively bridge that separation to allow communication between the VRF’s.
Assume the following scenario:
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Output101- sh run vrf
September 4, 2010Now that the hard work is behind me, the awesome holiday has past, I can finally get back to all the outstanding fun stuff. That said I have some good half completed posts are on the way :)
I came across the following command browsing the DOC-CD a couple months back, and I have used it ever since.
sh run vrf [vrf-name]
The show running vrf feature provides the option to display a subset of the running configuration on a router that is linked to a VRF instance. It can be used to display the configuration of a specific VRF or of all VRFs configured on a router. The command is unfortunately only available on the more recent IOS versions, but if available makes life easy.
