Comments on: 13 Tips for Passing Juniper Lab Tests http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/ One Network Architect's View of Life, the Internet, and Everything Tue, 08 May 2012 11:47:04 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Arijit http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-58 Arijit Tue, 12 Apr 2011 00:28:32 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-58 Hi Chris, I think I posed the question wrongly. Let me rephrase the question, do they give some extra time to go through the whole question paper before giving access to the routers. Thanks Arijit Hi Chris,

I think I posed the question wrongly.
Let me rephrase the question, do they give some extra time to go through the whole question paper before giving access to the routers.

Thanks
Arijit

]]> By: Chris Grundemann http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-57 Chris Grundemann Tue, 05 Apr 2011 14:02:11 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-57 Not directly, no. But you could always review any material you want/need before the actual start time (usually 9am I believe). Honestly though, you should be ready to go before test day if you want a good chance to pass. Not directly, no. But you could always review any material you want/need before the actual start time (usually 9am I believe). Honestly though, you should be ready to go before test day if you want a good chance to pass.

]]> By: Arijit http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-56 Arijit Tue, 05 Apr 2011 11:30:37 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-56 Hi Chris, Do they give any extra time to go thru the material before the start of actual JNCIE-M exam? Thanks Hi Chris,

Do they give any extra time to go thru the material before the start of actual JNCIE-M exam?

Thanks

]]> By: Chris Grundemann http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-55 Chris Grundemann Tue, 11 Jan 2011 20:52:04 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-55 Doan, You are exactly right, it is very much a layered approach and the initial tasks are the basis for later tasks. It is very wise to test your work as you move from section to section in the tests. An early mistake can cause you lot's of frustration and lost points later on. HTH, ~Chris Doan,

You are exactly right, it is very much a layered approach and the initial tasks are the basis for later tasks. It is very wise to test your work as you move from section to section in the tests. An early mistake can cause you lot’s of frustration and lost points later on.

HTH,
~Chris

]]> By: doan http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-54 doan Wed, 05 Jan 2011 22:03:26 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-54 Abdullah, are you sure you not confuse with the routing table? The routing table might contain say 100k total ip, but only 80k is active routes. The active routes translate to 80k next-hop for those active routes in the PFE. I've never know the RE to have any forwarding-table :) Remember your RE might have a lot of routes but only the active ones will be reflected in the PFE. A good example is a route reflector that might receive a lot of routes from clients but only picks the best one. Overall you might have 1 million routes coming from say 20 clients but only 300k are active routes with actual next-hops. Abdullah,

are you sure you not confuse with the routing table? The routing table might contain say 100k total ip, but only 80k is active routes. The active routes translate to 80k next-hop for those active routes in the PFE.

I’ve never know the RE to have any forwarding-table :) Remember your RE might have a lot of routes but only the active ones will be reflected in the PFE. A good example is a route reflector that might receive a lot of routes from clients but only picks the best one. Overall you might have 1 million routes coming from say 20 clients but only 300k are active routes with actual next-hops.

]]> By: abdullah http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-53 abdullah Wed, 17 Nov 2010 21:06:07 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-53 still there is a confuse between the Forwarding table, which is located in the R.E. and the Forwarding table, which is located in the F.E. in the R.E. there are the routing table(s) and the Forwarding table, and in the Forwarding Engine, also, there is another forwarding table. The question is; is there a difference in the content of the F.T. at the R.E. and the F.T. at the F.E.? For example FT of RE may have 100k IP routes while FT of the FE may have 80k. What does make the FT of the FE to be 80k while it was 100k? Also, how often the updates takes place between the forwarding tables? and what is the process to update route(s) in the Forwarding table at the FE. Regards, still there is a confuse between the Forwarding table, which is located in the R.E. and the Forwarding table, which is located in the F.E.
in the R.E. there are the routing table(s) and the Forwarding table, and in the Forwarding Engine, also, there is another forwarding table.
The question is; is there a difference in the content of the F.T. at the R.E. and the F.T. at the F.E.?
For example FT of RE may have 100k IP routes while FT of the FE may have 80k.
What does make the FT of the FE to be 80k while it was 100k?
Also, how often the updates takes place between the forwarding tables? and what is the process to update route(s) in the Forwarding table at the FE.
Regards,

]]> By: Doan http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-52 Doan Wed, 03 Nov 2010 20:41:44 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-52 Chris, i'm assuming that the way they structured the test that everything is built on top of another. Starting out with the IGP, BGP, mpls, etc. If you don't get the requirements working in the order that they ask then the rest probably doesn't matter right? I'm toying with the idea of actually attempting this monster test. Thanks. Chris,

i’m assuming that the way they structured the test that everything is built on top of another. Starting out with the IGP, BGP, mpls, etc. If you don’t get the requirements working in the order that they ask then the rest probably doesn’t matter right? I’m toying with the idea of actually attempting this monster test.

Thanks.

]]> By: Doan http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-51 Doan Wed, 03 Nov 2010 20:36:15 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-51 Technically if you're using a form of routing-instance then it will appear differently in your forwarding-table. They actually match what's in your routing table. show route table foobar.inet show route forwarding-table table foobar Technically if you’re using a form of routing-instance then it will appear differently in your forwarding-table. They actually match what’s in your routing table.

show route table foobar.inet
show route forwarding-table table foobar

]]> By: Doan http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-50 Doan Wed, 03 Nov 2010 20:22:47 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-50 If the requirements are spelled out, i'm wondering if you can blow away whatever policies they would have on there without spending time trying to figure out what they broke. Be easier if you can rewrite your own policies base on the requirements much like that of the JNCIP where you have to build it from scratch...just a thought. If the requirements are spelled out, i’m wondering if you can blow away whatever policies they would have on there without spending time trying to figure out what they broke. Be easier if you can rewrite your own policies base on the requirements much like that of the JNCIP where you have to build it from scratch…just a thought.

]]> By: Chris Grundemann http://chrisgrundemann.com/index.php/2009/13-tips-for-passing-juniper-lab-tests/#comment-49 Chris Grundemann Sun, 19 Sep 2010 23:35:58 +0000 http://weblog.chrisgrundemann.com/?p=500#comment-49 There are not two forwarding tables, there are multiple routing tables and a forwarding table. As the names imply, the routing tables contain routing information, as collected by routing protocols or local static/aggregate/generated route configurations and the forwarding table contains destinations and forwarding information (what to do with packets leaving the router for those destinations). Unless there is some form of filtering in place, the number of active destinations in your routing table should be very close to the number of destinations in your forwarding table for the same family (IPv4 = inet and IPv6 = inet6). Barring some policy in place to do such filtering, the only exceptions are well-known multicast destinations that will show up in the forwarding table but not necessaries in the routing table. Use "show route" to see all active routing tables and "show route forwarding-table" to see the forwarding table. Hope that helps. There are not two forwarding tables, there are multiple routing tables and a forwarding table. As the names imply, the routing tables contain routing information, as collected by routing protocols or local static/aggregate/generated route configurations and the forwarding table contains destinations and forwarding information (what to do with packets leaving the router for those destinations).

Unless there is some form of filtering in place, the number of active destinations in your routing table should be very close to the number of destinations in your forwarding table for the same family (IPv4 = inet and IPv6 = inet6). Barring some policy in place to do such filtering, the only exceptions are well-known multicast destinations that will show up in the forwarding table but not necessaries in the routing table.

Use “show route” to see all active routing tables and “show route forwarding-table” to see the forwarding table.

Hope that helps.

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