From: Kenneth R. Snell (ksnell@xxxxxxxxxxxxx)
Date: Mon Jan 31 2000 - 11:22:55 GMT-3
You could infact redistribute the /32 if the mask on the interface was /32.
Mike McSpedon wrote:
> 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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