From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Apr 26 2007 - 14:10:01 ART
Your next step in troubleshooting this should be to get on 152.1.37.3 and
see where it says it's learning those routes from.
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 4/26/07 9:25 AM, "WorkerBee" <ciscobee@gmail.com> wrote:
> Anyone can highlight why a router (Rack1SW1) doing 2-way redistribution > between > RIP and OSPF within the same router will cause me to loose all > my RIP learned routes from BB3 in the local routing table? > > [BB3] -- RIP -- [Rack1SW1] -- OSPF -- [R3] > > The only fix is to set RIP AD = 109 (less than OSPF AD) but why it happen?? > > Is it because the redistribute RIP routes appear as route feedback back to > OSPF as Type 5 LSA and being AD = 110, it replaced my RIP routes? > > > (Rack1SW1) > > Type-5 AS External Link States > > Link ID ADV Router Age Seq# Checksum Tag > 30.0.0.0 150.1.2.2 459 0x80000001 0x00F2F3 0 > 30.1.0.0 150.1.2.2 459 0x80000001 0x00E6FE 0 > 30.2.0.0 150.1.2.2 459 0x80000001 0x00DA0A 0 > 30.3.0.0 150.1.2.2 459 0x80000001 0x00CE15 0 > 31.0.0.0 150.1.2.2 459 0x80000001 0x00E5FF 0 > 31.1.0.0 150.1.2.2 459 0x80000001 0x00D90B 0 > 31.2.0.0 150.1.2.2 459 0x80000001 0x00CD16 0 > 31.3.0.0 150.1.2.2 459 0x80000001 0x00C121 0 > > > ############ Before 2-way redistribution ################## > > Rack1SW1#show ip route rip > 31.0.0.0/16 is subnetted, 4 subnets > R 31.3.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 31.2.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 31.1.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 31.0.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > 30.0.0.0/16 is subnetted, 4 subnets > R 30.2.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 30.3.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 30.0.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > R 30.1.0.0 [120/1] via 204.12.1.254, 00:00:12, Vlan73 > Rack1SW1#show ip route rip > > ############ After 2-way redistribution ################## > > router ospf 1 > router-id 150.1.7.7 > log-adjacency-changes > redistribute rip subnets > network 150.1.7.7 0.0.0.0 area 37 > network 152.1.37.7 0.0.0.0 area 37 > ! > router rip > version 2 > redistribute ospf 1 metric 1 > network 204.12.1.0 > no auto-summary > > Rack1SW1#show ip route rip > > <blank - no rip routes> > > And I learned the original RIP routes from my downstream OSPF router. > > O E2 31.3.0.0 [110/20] via 152.1.37.3, 00:04:52, Vlan37 > O E2 31.2.0.0 [110/20] via 152.1.37.3, 00:04:52, Vlan37 > O E2 31.1.0.0 [110/20] via 152.1.37.3, 00:04:52, Vlan37 > O E2 31.0.0.0 [110/20] via 152.1.37.3, 00:04:52, Vlan37 > > O E2 30.2.0.0 [110/20] via 152.1.37.3, 00:04:53, Vlan37 > O E2 30.3.0.0 [110/20] via 152.1.37.3, 00:04:53, Vlan37 > O E2 30.0.0.0 [110/20] via 152.1.37.3, 00:04:53, Vlan37 > O E2 30.1.0.0 [110/20] via 152.1.37.3, 00:04:53, Vlan37 > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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