As the name suggests, this feature allows routes with a specific tag to be installed in the RIB faster than other prefixes. By default, the highest priority prefixes are ones with /32 masks. As we will see here, we can tag routes to give them a higher priority than /32 prefixes.
The command we will be using to see this in action is:

R3#debug isis local-updates
IS-IS local updates debugging is on
R3 is in an L1 area with 2 routers, R1 and R2.
R1 is advertising 10.1.1.1/32, 10.1.11.1/32 and redistributing 200.0.0.0/24.
R2 is advertising 10.1.1.2/32 and 10.1.20.0/24.
The other routes you see in the debugs are connected routes between routers.
Let's clear IS-IS on R3 and see what routes have the highest priority:
*Mar 1 17:35:50.883: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.1
*Mar 1 17:35:50.891: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 10.1.11.1
*Mar 1 17:35:50.895: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.2
*Mar 1 17:35:50.899: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.113.0
*Mar 1 17:35:50.903: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.12.0
*Mar 1 17:35:50.907: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 200.0.0.0
*Mar 1 17:35:50.915: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 10.1.20.0
Notice all the /32 prefixes were processed first. Then rest were processed in no particular order. Suppose we want the 200.0.0.0 route processed first. We could do the following (Wide-metrics must be enabled):
On R1 tag the route during redistribution:
R1(config)#route-map con2isis 10
R1(config-route-map)#set tag 1000
R1(config-route-map)#router isis
R1(config-router)#redistribute connected route-map con2isis level-1
On R3, we configure the router to give priority to tag 1000:
R3(config)#router isis
R3(config-router)#ip route priority high tag 1000
Clear ISIS on R3:
R3#cle isis *
*Mar 1 17:40:27.475: ISIS-Upd: Building L1 LSP
*Mar 1 17:40:27.955: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->1000) change, 200.0.0.0
*Mar 1 17:40:27.959: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.2
*Mar 1 17:40:27.963: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.1
*Mar 1 17:40:27.967: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 10.1.11.1
*Mar 1 17:40:27.971: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.12.0
*Mar 1 17:40:27.971: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 10.1.20.0
*Mar 1 17:40:27.971: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.113.0
The routes with tag 1000 are processed first every time. Let's tag 10.1.20.0 on R2, it is loopback 20.
R2(config)#int lo 20
R2(config-if)#isis tag 1000
R3#cle isis *
*Mar 1 17:41:45.259: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->1000) change, 10.1.20.0
*Mar 1 17:41:45.263: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->1000) change, 200.0.0.0
*Mar 1 17:41:45.267: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.2
*Mar 1 17:41:45.271: ISIS-Loc: L2 non-summarized metric(4294967295->10)or route-type(->L1) or tag (0->0) change, 10.1.1.1
*Mar 1 17:41:45.275: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 10.1.11.1
*Mar 1 17:41:45.283: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.12.0
*Mar 1 17:41:45.287: ISIS-Loc: L2 non-summarized metric(4294967295->20)or route-type(->L1) or tag (0->0) change, 192.168.113.0
So to summarize:
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Hey everyone! Thanks for checking in. This weeks CCIE Candidate Spotlight shines on Chris Jones of Pittsburg State University. Some of you may know Chris as IPv6Freely. Chris and I met awhile back, actually in a Facebook CCIE user group. Take a moment and learn about Chris who is looking to conquer the R&S lab exam in October!
Here's the tale of the tape:

Name: Chris Jones
Age: 27
Company: Pittsburg State University
City/State/Country: Pittsburg, KS USA
Certifications Completed: CCNA, CCNA Security, CQS Wireless, CCNP, JNCIA-M
Certifications Currently Studying: CCIE R&S, JNCIS-M, CCNA Wireless
How long have you been studying for current certification? 6 Months
Lab Date(s): October 8
Lab Attempts: 0 so far
Blog/Website: www.icanhasipv6.com
What Company(s) are you using for studies if any? InternetworkExpert, IPexpert
What products have you used from these companies: CCIE R&S End-to-End (Now CCIE 2.0)
Do you own your own rack equipment? Dynamips + 3550/3560s
Hours per day you study? 1-2
Have you or would you attend any boot camps? I have not, but I would love to.
Do you plan on going after another certification? JNCIE-M after CCIE R&S
Tell me what you like to do when you are NOT studying or working: Watching hockey (Leafs), baseball (Jays), listening to music, watching movies, watching TV shows (online, of course... I'm not paying for cable!)
What could the vendors do to make studying easier/better? Inject the knowledge directly into my brain. Apart from that, nothing really. The vendors do a great job. Perhaps they could be a little more interactive with their students... "coaching" you might call it.
Do you want to be featured on the next edition of CCIE Candidate Spotlight? If so, please contact me! Thank you Chris! Don't forget to go to his blog and leave comments and add him to your blog rolls!
Just a quick note to announce that our newest Volume 1 Lab Workbooks for R&S(covering the 4.0 lab) and Voice (covering the 3.0 lab) are finished and will begin shipping this Friday (June 26th). I’m extremely impressed with these new products and am confident that our clients will also be VERY satisfied and impressed. The R&S Workbook is updated with 50% more content covering the latest topics (recently announced by Cisco) and the Voice Workbook is absolutely amazing covering all of the topics on the new 3.0 blueprint. Our new and completed Security Lab Workbook (Volume 1 for blueprint 3.0) will also be shipping within the next 3 weeks). Existing customers will have these sections / books added to their members area and additional details about these products, Volume 2 Workbook release dates and Video / Audio on Demand release dates will be published on our website soon.
Regards, Wayne"
Pretty good news if you ask me. After hearing the excitement from not only our developers, but, Wayne himself, these new products should blow the "competition" right out of the water!
Approximately 1 year ago when we began internal preparation meetings for what we knew would become the new v3 Voice blueprint, we knew that the older 7960 phone models wouldn’t do. In fact, they are largely incapable of performing (and thus testing) approximately 25-30% of the newer functions listed in the blueprint for the v3 Voice Lab Exam (Even much more so on the SIP side of phones, but SCCP has quite a few large features as well that can’t be tested without newer model phones) (For only a partial list, take a look at the CUCM SRND pg 819). 30% is an overall huge percentage of things for you to not be able to study and test for, before reaching your actual lab exam. It’s much more than a failing percentage. So it quickly becomes obvious that this is simply an unacceptable amount of testable content for us not to cover. We would be much more than remiss in not providing you with a test platform for such testable topics, we would be dreadfully in violation of our duties to fully prepare you for the CCIE Voice 3.0 Exam. It should be noted that to date (as of this penning), none of the other vendors claiming to teach or develop for the new v3.0 Voice Lab Exam has anything except 7960 phones in their online racks and in their classrooms. We simply don’t understand how they are claiming to prepare people. The simple fact is that they are leaving out this 25-30% in their self-study workbooks and in their classroom instruction.
To that end, we decided upon, and procured long ago, newer 7962 model phones for our classrooms. We decided on 7962’s vs 7961’s simply for the fact that they can perform one additional feature that the 7961 models could not, and could be tested.
All of that brings me to this statement, for all future development IPexpert does, and all future workbooks or labs to be released (including the remainder of Volume 1 next week!!), we will focus all of our labs and testing around the 7962 phone primarily. This allows us as developers to test everything in hardware instead of software, ensuring that 100% like-functionality will occur from our labs and solutions to your actual experience sitting the CCIE Voice Lab Exam.
So the good news is two-fold:
So for item #1: IPBlue now (in this next week actually) supports the 7962 phone type! However, while that is great news, they only supports the SCCP protocol, and from the blueprint we easily see at the top that we will need to know and be able to test both the SCCP and SIP protocols for both the CUCM and CUCME cluster types.
So our layout for the 5 phones that you will need to own either in hardware or in softphone fashion to test our self-study products with are:
For item #2: Here are simple directions on how you can easily use Cisco Hardware IP Phones with your Cisco Software IPSec VPN Client:
That should be it. When you have your vRack session, and you have connected your Cisco VPN Client to the Proctor Labs vRack, and you have taken care of any necessary infrastructure configuration/troubleshooting steps, as well as phone configuration/MAC address changes/TFTP/CCM Services activated and running - all pointed out to you by your Lab scenario, you will now be able to register those hardware phones to your CUCM, CUCME, and PSTN CUCME respectively - no switch needed!
We hope that this blog post has been informative, and certainly welcome any comments related to either of these two topics!
Cheers,
Mark"
Well, I posted on TWITTER and my Facebook the other day that I would have some tentative dates for some onsite instructor led boot camps. Well, after going through the schedule and such, I have come up with 2 to start with – A Voice boot camp in Europe and a R&S boot camp in New York City (Possibly Malaysia as well) ---
If you are interested, PLEASE EMAIL ME and in the subject line put I AM INTERESTED IN ONE OF YOUR ONSITES MIKE!
CCIE Voice 5 Day Instructor Led Boot Camp
London, England --- September 28 – October 2, 2009
Details:
For pricing information, please CONTACT ME directly. Pricing will vary with the amount of people that do attend. So, if you have friends or co-workers, get them in the class for a cheaper price!
Keep in mind – this is a TENATIVE DATE – Class will run only if we have enough people. I will be updating everyone AS IT HAPPENS. So far there is a ton of talk of people wanting this to go – so, pass this on to everyone – post it everywhere!
CCIE R&S 5 Day Instructor Led Boot Camp
New York City, New York --- August 31 – September 4, 2009
Details:
For pricing information, please CONTACT ME directly. Pricing will vary with the amount of people that do attend. So, if you have friends or co-workers, get them in the class for a cheaper price!
Keep in mind – this is a TENATIVE DATE – Class will run only if we have enough people. I will be updating everyone AS IT HAPPENS. So far there is a ton of talk of people wanting this to go – so, pass this on to everyone – post it everywhere!
If you have any questions at all or are interested in another location, please let me know!
Hey all,
It was a popular feature on my old blog so I decided to bring it to my new blog. Each week (hopefully) I will feature a new CCIE candidate who is trying to conquer the beast just like most of you. This weeks CCIE Candidate Spotlight Feature is on Jo Knight. You may know him from his BLOG - I have had the pleasure of working with him through his R&S CCIE and now through his journey to beat the Voice lab. So, do you want to know more about Jo?
Here's the tale of the tape:
Name: Jo Knight
Age: 33
Company:
City/State/Country: Doha, Qatar but originally from London, England
Certifications Completed: CCIE R&S - #22262
Certifications Currently Studying: CCIE Voice
How long have you been studying for current certification? On and off for the last six months, but in reality more off than on due to being too busy at work. Now its time to get serious about it and get going.
Lab Date(s): Aiming for Sometime in early 2010 - hopefully March/April
Lab Attempts: 0
Blog/Website: http://ccielab.wordpress.com
What Company(s) are you using for studies if any? IPexpert and ccbootcamp
What products have you used from these companies: IPexpert Voice BLS for the Lab and ccbootcamp CCIE Voice Written Study Guide for the...er...Written
Do you own your own rack equipment? No - Proctor Labs all the way....
Hours per day you study? Currently 1-2 a day for the written exam, will try to get 4-5 when Im doing labs in the near future.
Have you or would you attend any boot camps? I would like to check out the IPexpert Voice bootcamps - Vik and Mark seem to be the best out there based on what I am hearing.
Do you plan on going after another certification?I'm not sure I could deal with being a triple CCIE at any time in my life - my wife wouldnt allow it anyway. Lets get number two out of the way first before thinking of any others... SP would be the next one if I was pushed into it.
Tell me what you like to do when you are NOT studying or working:Ive recently moved out to the Middle East for a different way of life, summer is pretty much going to be spent indoors due to the heat, but I like going out into the desert in the 4x4 and quad biking, BBQ'ing when we can. Of course spending time with my wife is high up on the list too
What could the vendors do to make studying easier/better?I find the video walkthroughs to labs very helpful along with the main VoD lessons. I am good at learning by doing, and if I see someone else doing it first, seem to pick it up a lot easier. So more high quality video training please would suit me to the ground - (hint and updated v3 voice videos on the BLS)
Do you want to be featured on the next edition of CCIE Candidate Spotlight? If so, please contact me! Thank you Jo! Don't forget to go to his blog and leave comments and add him to your blog rolls!