Nice lab work there Steve!
On Tue, Apr 27, 2010 at 2:52 AM, Di Bias, Steve <[email protected]> wrote: > I just labbed this up with R2, R5, and R6, here are my findings. On the hub > (R2) I used a single physical interface (s0/0) and enabled RIP advertising > the 150.100.100.0/24 network, I did the same on R5 and R6. Next I verified > that split-horizon was disabled on the physical interface > > R2(config)#do sh ip int s0/0 | i Split > Split horizon is disabled > > On R6 I created a new loopback interface using 6.6.6.6/32 and brought it into > the routing process, I'm now seeing the route on R5 > > R5#show ip route rip | i 6.6.6.6 > R 6.6.6.6 [120/2] via 150.100.100.6, 00:00:13, Serial0/0 > > Next I enabled split horizon on R2's s0/0 and waited for it to timeout on R5 > (watching Deadliest Warrior during downtime :) > > R2(config)#int s0/0 > R2(config-if)#ip split-horizon > R2(config-if)#do sh ip int s0/0 | i Split > Split horizon is enabled > > R5#sh ip route rip | i 6.6.6.6 > R 6.6.6.6/32 is possibly down, > > So by default split-horizon is disabled on physical frame relay interfaces > and RIP routes will be advertised. > > What about EIGRP?? > > I'll use the same scenario by removing RIP and enabling EIGRP in AS 666 > > R2(config-if)#do sh ip int s0/0 | i Split > Split horizon is disabled > > On R5 I never receive any D routes even though split-horizon is clearly > disabled on R2's s0/0 > > R5#sh ip ro > 200.0.0.0/32 is subnetted, 1 subnets > C 200.0.0.5 is directly connected, Loopback0 > 150.100.0.0/24 is subnetted, 1 subnets > C 150.100.100.0 is directly connected, Serial0/0 > > Now let's disable split-horizon for EIGRP AS 666 on R2 s0/0 > > R2(config)#int s0/0 > R2(config-if)#no ip split-horizon eigrp 666 > > R5#sh ip ro eig > D 6.0.0.0/8 [90/41152000] via 150.100.100.2, 00:00:09, Serial0/0 > > So For RIP split horizon is disabled by default on multipoint interfaces > (including the physical interface) but it is not disabled for EIGRP unless > you do it manually. > > I hope this helps Rob :) > > - Steve > > > > > > > > > > > -----Original Message----- > From: Joe Astorino [mailto:[email protected]] > Sent: Monday, April 26, 2010 4:04 PM > To: Di Bias, Steve; Routt, Rob; [email protected]; CCIE OSL > Subject: Re: [OSL | CCIE_RS] VOD Frame-relay > > I would need to run a quick test to validate, but I do not recall split > horizon being disabled by default on physical interfaces at all > > A good example would be trying to run RIP. I do not think you would get spoke > routes on the other spoke without disabling it > > > Sent from my Verizon Wireless BlackBerry > > Regards, > > Joe Astorino - CCIE #24347 > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE > (R&S, Voice, Security & Service Provider) certification(s) with training > locations throughout the United States, Europe, South Asia and Australia. Be > sure to visit our online communities at www.ipexpert.com/communities and our > public website at www.ipexpert.com > > -----Original Message----- > From: "Di Bias, Steve" <[email protected]> > Date: Mon, 26 Apr 2010 18:46:41 > To: Joe Astorino<[email protected]>; Routt, Rob<[email protected]>; > [email protected]<[email protected]>; > CCIE OSL<[email protected]> > Subject: RE: [OSL | CCIE_RS] VOD Frame-relay > > Joe is right; EIGRP will still be on by default under a physical frame relay > interface. You can use the "no ip split-horizon eigrp AS#" command on the > interface to disable. > > Sorry about that > > -Steve > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Joe Astorino > Sent: Monday, April 26, 2010 3:44 PM > To: Routt, Rob; [email protected]; CCIE OSL > Subject: Re: [OSL | CCIE_RS] VOD Frame-relay > > You will still need to disable it for EIGRP specifically as well > > > Sent from my Verizon Wireless BlackBerry > > Regards, > > Joe Astorino - CCIE #24347 > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, > Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE > (R&S, Voice, Security & Service Provider) certification(s) with training > locations throughout the United States, Europe, South Asia and Australia. Be > sure to visit our online communities at www.ipexpert.com/communities and our > public website at www.ipexpert.com > > -----Original Message----- > From: "Routt, Rob" <[email protected]> > Date: Mon, 26 Apr 2010 15:24:36 > To: ccie_rs<[email protected]> > Subject: [OSL | CCIE_RS] VOD Frame-relay > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > > UHS Confidentiality Notice: This e-mail message, including any attachments, > is for the sole use of the intended recipient (s) and may contain > confidential and privileged information. Any unauthorized review, use, > disclosure or distribution of this information is prohibited. If this was > sent to you in error, please notify the sender by reply e-mail and destroy > all copies of the original message. > > > UHS Confidentiality Notice: This e-mail message, including any attachments, > is for the sole use of the intended recipient (s) and may contain > confidential and privileged information. Any unauthorized review, use, > disclosure or distribution of this information is prohibited. If this was > sent to you in error, please notify the sender by reply e-mail and destroy > all copies of the original message. > -- Regards, Joe Astorino - CCIE #24347 Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
