From: Mike McSpedon (Mike@xxxxxxxx)
Date: Sun Jan 30 2000 - 22:14:17 GMT-3
I tried both also, and indeed both ways work. I stand corrected--Bob was
correct that using a 0.0.0.0 mask will prohibit the 137.20.20.0 /24 route
from bring redistributed into EIGRP. using a 0.0.0.255 mask makes the
redistribution possible. Why? I'm not sure, since redistributing /32's
works fine with EIGRP. Redistributed connected works also regardless of
how you included the route in OSPF (of course). That's why I like this
profession, there's always more than one way to solve a problem, and I'm
always learning something... BTW, I don't recall ever seeing this
particular problem in a book either...
-Mike
At 02:56 PM 1/30/00 -0800, zhencai wrote:
>Hi,
>
>I tried both Mike's suggestion "redistribute connected" and Bob's suggestion
>"network 137.20.20.0 0.0.0.255 area 0". Both work. I'm using IOS 11.2(12)
>enterprise. I'll try 11.3 and 12 later. The problem is: I never heard of
>this problem before, it's not in Doyle's book, it's not in Caslow's book and
>it's not in Slattery's book. Where did you guys get the information from? I
>couldn't find on CCO talking about this weird EIGRP thing...
>Thanks a lot.
>
>Zhen Cai
>
>-----Original Message-----
>From: Mike McSpedon [mailto:Mike@ccci.com]
>Sent: Sunday, January 30, 2000 7:36 PM
>To: Kang, Bob (CAP, ITS, CA); 'zhencai'; ccielab@groupstudy.com
>Subject: RE: redistribution help
>
>
>Bob,
>
>I respectfully differ. Redistributing /32 (hosts) routes into EIGRP is
>no problem on late 11.3 and 12.0 IOS (if there are any doubts, create a
>host route on R1 on a loopback interface and redistribute it via
>'redistribute connected'. Then check the routing tables on R2 and
>R3--they'll see the host route as a /32 subnet off the major network).
>Also, including the R1's E0 interface in OSPF with 0.0.0.0, as I understand
>it, has nothing to do with it. The 0.0.0.0 just narrows the inclusion down
>to an exact match. The lack of a neighbor makes the 137.20.20.0 network a
>stub network, not the 0.0.0.0.
>
>Again, with respect to the redistribution problem, the 137.20.20.0 /24 is a
>connected network on R1, not one dynamically learned via OSPF (no neighbors
>= no adjacencies = no spf calculation = no dynamic OSPF routing information
>at all). Therefore, the solution is to redistribute 137.20.20.0 /24 into
>EIGRP via 'redistribute connected.'
>
>If anyone sees a flaw in my thinking, please correct me.
>
>Thanks!
>-Mike
>
>
>
>
>
>At 03:16 PM 1/30/00 -0500, Kang, Bob (CAP, ITS, CA) wrote:
>>Hi there,
>>
>>
>>Eigrp has no idea of /32 network, it will not distribute any address with
>>/32 mask.
>>Your config shows the 137 network is incorporated into ospf with /32. That
>>is the reason!
>>Use any other mask (except /0, that is also not recognized by eigrp), you
>>will find the pretty route you loved to see!
>>
>>Bob
>>
>>-----Original Message-----
>>From: zhencai [mailto:zhencai@home.com]
>>Sent: January 29, 2000 8:56 PM
>>To: ccielab@groupstudy.com
>>Subject: redistribution help
>>Importance: High
>>
>>
>>Hi,
>>
>>I thought I knew redistribution and this is a fairly simply senario, but I
>>couldn't make this work, any help will be greatly appreciated!!!
>>
>>------R1=======R2=======R3
>> e0 s0 s0 s1 s0
>>|-ospf-|-------eigrp-----|
>>
>>R1:
>>interface e0
>> ip addr 137.20.20.1 255.255.255.0
>>interface s0
>> ip addr 192.168.21.1 255.255.255.0
>>router ospf 10
>> redistribute eigrp 200 metric 64 subnet
>> network 137.20.20.1 0.0.0.0 area 0
>>router eigrp 200
>> redistribute ospf 10 metric 10000 100 255 1 1500
>> network 192.168.21.0
>> no auto-summary
>>
>>R2:
>>interface s0
>> ip addr 192.168.21.2 255.255.255.0
>>interface s1
>> ip addr 192.168.17.1 255.255.255.0
>>router eigrp 200
>> network 192.168.17.0
>> network 192.168.21.0
>>
>>R3:
>>interface s0
>> ip addr 192.168.17.2 255.255.255.0
>>router eigrp 200
>> network 192.168.17.0
>>
>>Clock rate is properly configured. From R3, I can't see R1's e0 subnet
>>unless I chance R1's e0 to /16 subnet. But EIGRP is VLSM, 137.20.20.0/24
>>should be able to get advertised into EIGRP. right? What did I do wrong?
>>Thanks a lot.
>>
>>Zhen Cai
>>
>>p.s. IOS is 11.2(12) enterprise
>>
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