From: Aidan Marks (amarks@cisco.com)
Date: Sun Dec 29 2002 - 18:40:48 GMT-3
The tunnel solution works quite nicely, and in doing so remember:
1) multiple GRE tunnels using the same encap between 2 routers need
different source/dest addresses, i.e. one loopback per tunnel
2) be careful about route recursion,
http://www.cisco.com/warp/public/105/gre_flap.html (instead of doing
statics in this document, you can just filter the routes being learnt by
the protocol).
I got this going with RIPv1/OSPF, 2 tunnels (e.g. /24, /25) with physical a
/30, in a matter of minutes.
Aidan
At 08:04 PM 29/12/2002, kym blair wrote:
>Jay and Yong,
>
>When you are doing mutual redistribution between OSPF and RIP, there are
>several ways to get the OSPF routes into RIP:
>
>(1) Use RIP version 2
>
>(2) Create a /30 secondary address on the R2-R3 link so R3 will learn the
>/24 AND /30 routes (repeat for other masks)
>
>(3) Create a tunnel between R2 and R3 with a /30 mask (repeat for other masks)
>
>(4) My favorite if you can't use RIPv2: Create another OSPF process on R2;
>redistribute OSPF 1 into OSPF 2; add summary-address statements under OSPF
>2; redistribute OSPF 1 and OSPF 2 into RIP.
>
>HTH, Kym
>
>
>
>
>
>
>
>>From: @L?k?l <dragain@samsung.com>
>>Reply-To: @L?k?l <dragain@samsung.com>
>>CC: ccielab@groupstudy.com
>>Subject: Re: RIP to OSPF redistribution
>>Date: Sat, 28 Dec 2002 22:21:55 +0900
>>
>>I have a similar question.
>>If R2 don't have some area about 140.100.2.0/24
>>I think R1 also don't have "140.100.2.0/24" route.
>>How can R1 have route of "140.100.2.0/24"
>>
>>
>>
>>------- ?x:; 8^<<Av -------
>> :83=;g6w : Jay Greenberg <groupstudylist@execulink.com>
>> 3/ B% : 20023b 12?y 28@O 16=C 06:P
>> A& 8q : RIP to OSPF redistribution
>>
>>I'm sure this question has been asked a million times, but the archives
>>aren't giving me the answer I'm looking for. How do you summarize OSPF
>>type 3 LSAs into RIP when there is no ABR to summarize on?
>>
>>R1-----(ospf)-----R2------(rip)------R3
>>
>>R1 - R2 is subnet 140.100.1.0/30
>>R2 - R3 is subnet 140.100.2.0/24
>>
>>How can R3 learn about 140.100.1.0/30 without using static routes?
>>There is no ABR to use "area range", and there is no inbound ASBR to use
>>ospf "summary-address", nor are these type 5/7 LSAs.
>>
>>Answers I've heard so far are:
>>
>>"use the ip summary-address rip" command on R2, but I tried that in the
>>lab and nothing happened. Maybe I was doing something wrong?
>>
>>"use a default-network" on R2, and I have used this in a practice lab,
>>and it worked, but I'm worried that a real lab won't allow default
>>routes.
>>
>>Any comments would be greatly appreciated.
>>.
>>.
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