Comments on: Tutorial: Troubleshooting Split Horizon Issues, Part 1 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/ Helping You Become a Network Ninja Fri, 19 Mar 2010 22:04:51 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Matt Zweil http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-15418 Matt Zweil Mon, 02 Nov 2009 07:26:37 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-15418 Thank you for the article, Arden. For follow-up, I wanted to point out a minor difference between RIP & EIGRP with regard to Split Horizon. IP Split Horizon and EIGRP Split Horizon are two different functions with different behaviors. Also, EIGRP Split Horizon is on by default (even under a physical frame-relay interface), and would still need to be disabled for the above topology to work. For example, if you configure Frame Relay on the physical interface, and run "show ip interface X/x" you will see "Split horizon is disabled." However EIGRP will still not forward updates it received on interface X/x out to other neighbors on the NMBA network on interface X/x. You will need to configure "no ip split-horizon eigrp [ASN]" on the interface in order to enable the routes to propogate. Thank you for the article, Arden. For follow-up, I wanted to point out a minor difference between RIP & EIGRP with regard to Split Horizon. IP Split Horizon and EIGRP Split Horizon are two different functions with different behaviors. Also, EIGRP Split Horizon is on by default (even under a physical frame-relay interface), and would still need to be disabled for the above topology to work. For example, if you configure Frame Relay on the physical interface, and run “show ip interface X/x” you will see “Split horizon is disabled.” However EIGRP will still not forward updates it received on interface X/x out to other neighbors on the NMBA network on interface X/x. You will need to configure “no ip split-horizon eigrp [ASN]” on the interface in order to enable the routes to propogate.

]]> By: durga prasad http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-8849 durga prasad Thu, 16 Apr 2009 12:14:55 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-8849 good knowledge good knowledge

]]> By: RIPv1 -part1- « Perjalanan Belum Usai http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-8250 RIPv1 -part1- « Perjalanan Belum Usai Fri, 03 Apr 2009 15:41:40 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-8250 [...] mengirimkan update rute yang sama pada router yang mengirimi kita update tersebut. Baca-baca dari sini, mengatakan bahwa sesungguhnya [...] [...] mengirimkan update rute yang sama pada router yang mengirimi kita update tersebut. Baca-baca dari sini, mengatakan bahwa sesungguhnya [...]

]]> By: Ibrahim http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-5240 Ibrahim Sat, 22 Nov 2008 14:00:22 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-5240 You So funny i like the way you tutor...you have sense of humor...keep up the good work... You So funny i like the way you tutor…you have sense of humor…keep up the good work…

]]> By: Note sullo split-horizon « CCIE.italy http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-3111 Note sullo split-horizon « CCIE.italy Sun, 28 Sep 2008 10:23:48 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-3111 [...] Note sullo split-horizon Posted Domenica, 28 Settembre 2008 Filed under: Uncategorized |  http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/ [...] [...] Note sullo split-horizon Posted Domenica, 28 Settembre 2008 Filed under: Uncategorized |  http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/ [...]

]]> By: Chris Dudley http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/comment-page-1/#comment-1207 Chris Dudley Sat, 19 Jul 2008 16:32:59 +0000 http://ardenpackeer.com/routing-protocols/tutorial-troubleshooting-split-horizon-issues-part-1/#comment-1207 Hi! I'm studying with similar 3 router FR setup in dynamips. This tutorial has helped with an issue I've had. Thank you! Unfortunately, one problem remains. I'm advertising all 3 loopbacks into RIP. The problem is R3 will see its loopback as a RIP route advertised by R1. The same happens for R2 and its loopback. I do not have these problems when I mock the lab with 2500s. Do you have any suggestions? Thanks for any help. Chris Hi!

I’m studying with similar 3 router FR setup in dynamips. This tutorial has helped with an issue I’ve had. Thank you!

Unfortunately, one problem remains. I’m advertising all 3 loopbacks into RIP. The problem is R3 will see its loopback as a RIP route advertised by R1. The same happens for R2 and its loopback.

I do not have these problems when I mock the lab with 2500s.

Do you have any suggestions? Thanks for any help.

Chris

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