Bryan,
Just a final clarification if you don't mind. I changed this Lab scenario so that the tunnel is running OSPF instead of EIGRP. The recursive thing happened again because R1 preferred the route to R6's tunnel destination (6.6.6.6/32) via OSPF over RIP (which was how R1 was learning about the 6.6.6.6/32 net before the tunnel). This time to fix the problem I configured: R1 router ospf 1 distance 125 6.6.6.6 0.0.0.0 This worked. So for clarification, is it correct to say: To fix recursive lookups caused by routing EIGRP over the tunnel, increase the distance to the tunnel IP address on the other side of the tunnel. To fix recursive lookups caused by routing OSPF over the tunnel, increase the distance to Router ID of the router on the other side of the tunnel. ________________________________ From: Bryan Bartik [mailto:[email protected]] Sent: Tuesday, June 16, 2009 7:36 PM To: Meraz, Richard Cc: CCIE OSL Subject: Re: [OSL | CCIE_RS] Vol3 Lab3 Task 3.7 Fixing Recursive Routing Issues Your welcome Richard, hopefully soon many things seem that way :) On Tue, Jun 16, 2009 at 8:28 PM, Meraz, Richard <[email protected]> wrote: Bryan, For so much past grief, that was way too easy! One less potential problem to worry about. Thanks again!! ________________________________ From: Bryan Bartik [mailto:[email protected]] Sent: Tuesday, June 16, 2009 6:00 PM To: Meraz, Richard Cc: CCIE OSL Subject: Re: [OSL | CCIE_RS] Vol3 Lab3 Task 3.7 Fixing Recursive Routing Issues Richard, it refers to the source IP address of the neighbor. Do a "show ip eigrp neighbor" and use that address. Does that work? On Tue, Jun 16, 2009 at 5:16 PM, Meraz, Richard <[email protected]> wrote: In Vol3 Lab3 Task 3.7 we are asked to create a tunnel between R6 and R1. As expected, this created a recursive lookup. This task therefore brought up a question I have had with resolving recursive lookups over tunnels. My configuration was as follows on R6 and R1 (the distance 90 90, and adding the Loopbacks was a lab requirement): R1 int tun 1 ip add 143.43.16.1 255.255.255.0 tunnel source 1.1.1.1 tunnel destination 6.6.6.6 router eigrp 16 net 1.1.1.1 0.0.0.0 net 143.43.16.1 0.0.0.0 distance eigrp 90 90 R6 int tun 1 ip add 143.43.16.6 255.255.255.0 tunnel destin 1.1.1.1 tunnel source 6.6.6.6 router eigrp 16 no auto net 143.43.16.6 net 6.6.6.6 0.0.0.0 distance eigrp 90 90 To try and fix the problem, which was wrong, I configured: R6 router eigrp 16 distance 180 1.1.1.1 0.0.0.0 16 R1 router eigrp 16 distance 180 6.6.6.6 0.0.0.0 16 Then I tried R6 distance 180 143.43.16.1 0.0.0.0 R1 distance 180 143.43.16.6 0.0.0.0 My question then is when using the distance command what does the "A.B.C.D IP Source Address" refer to? I would have thought that to R6 1.1.1.1 would be the "source" announcing the 143.43.16.0 networks. Thanks for the clarification, Rich -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
