From: Todd, Douglas M. (DTODD@PARTNERS.ORG)
Date: Thu Apr 26 2007 - 14:37:45 ART
I am actually working on that lab right now -
Let me take a look - you can unicast me if you want to work on this together..
DMT
-----Original Message-----
From: WorkerBee [mailto:ciscobee@gmail.com]
Sent: Thursday, April 26, 2007 1:35 PM
To: Todd, Douglas M.
Cc: Brian Dennis; Cisco certification
Subject: Re: Redistribution between RIP and OSPF..RIP routes disappear..
Hi Todd,
According to Brian suggestion, R3 learned the redistributed RIP via OSPF and
advertise to other downstream routers R1 and R2 and all 3 of them formed a loop.
The moment I fixed the RIP AD of SW1 to 109, the loop breaks and R3 now point to
SW1 instead of R1/R2.
I am still wondering why R3 now point correct to SW1 after SW1 fix the RIP AD =
109...
PS: This is actually a task IEWBv4.0 core lab 4.
On 4/27/07, Todd, Douglas M. <DTODD@partners.org> wrote:
> If I understand your issue correctly you may have a administrative
> distance issue w/route feedback (as you have eluded to).
>
> Here is one thing you can do to see if you have an administrative
> distance
> issue:
>
> router ospf 1
> distance 200 <address of neighbor> <access-list of rip routes>
>
> See if your rip routes returned.
>
> You could also turn on debug ip routing and see what you find out...
>
> DMT
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Brian Dennis
> Sent: Thursday, April 26, 2007 1:10 PM
> To: WorkerBee; Cisco certification
> Subject: Re: Redistribution between RIP and OSPF..RIP routes disappear..
>
> 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
>
> ______________________________________________________________________
> _ Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
> The information transmitted in this electronic communication is intended only
for the person or entity to whom it is addressed and may contain confidential
and/or privileged material. Any review, retransmission, dissemination or other
use of or taking of any action in reliance upon this information by persons or
entities other than the intended recipient is prohibited. If you received this
information in error, please contact the Compliance HelpLine at 800-856-1983 and
properly dispose of this information.
>
>
The information transmitted in this electronic communication is intended only for the person or entity to whom it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this information in error, please contact the Compliance HelpLine at 800-856-1983 and properly dispose of this information.
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:38 ART