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RE: OSPF Routing posted 05/05/2000
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Use 'ip default-network' on the router.  IGRP will like to pick this up, and
likely will redistribute it into OSPF.  You should have 'ip classless'
configured as well to make it a candidate for unknown routes.

Scott

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx]On Behalf Of
Michael Needham
Sent: Friday, May 05, 2000 12:52 PM
To: Earl Aboytes
Cc: John Conzone; Joe Martin; wyan@xxxxxxxxxx; ccielab@xxxxxxxxxxxxxx
Subject: Re: OSPF Routing


The question I have is how would you inject inject the default route
into IGRP if you cannot use static, summary routes or rotue to nulls but
are redistributing IGRP to OSPF into each other (all routers using the
same network addresses).... I can't figure it out..... Any ideas?

Earl Aboytes wrote:
>
> Pay attention to the redistribute connected and the route map.  The
> network for the summary address is my isdn link.
>
> interface BRI0
>  ip address 170.100.7.1 255.255.255.252
>  no ip directed-broadcast
>  encapsulation ppp
>  dialer pool-member 1
>  isdn switch-type basic-ni
>  isdn spid1 0835866201
>  isdn spid2 0835866401
>  ppp callback accept
>  ppp authentication chap
>
> router ospf 1
>  summary-address 170.100.7.0 255.255.255.0
>  redistribute connected subnets route-map ospf_conn
>  redistribute igrp 1 metric 30 metric-type 1 subnets
>  passive-interface Dialer0
>  network 170.100.1.0 0.0.0.255 area 0
>  network 170.100.2.0 0.0.0.255 area 0
>  network 170.100.7.0 0.0.0.15 area 0
>  network 170.100.42.240 0.0.0.15 area 0
>  area 0 range 170.100.7.0 255.255.255.0
> !
> router igrp 1
>  redistribute ospf 1 metric 1544 10 255 1 1500
>  passive-interface BRI0
>  passive-interface Dialer0
>  passive-interface Ethernet0
>  network 170.100.0.0
>
> access-list 3 permit 170.100.7.0 0.0.0.15
> access-list 3 permit 170.100.42.240 0.0.0.15
>
> route-map ospf_conn permit 10
>  match ip address 3
> !
> Hope this answers your question
> Earl
>
> At 05:37 PM 5/4/00 -0400, John Conzone wrote:
>
> >     If I remember correctly, I had an ASBR with RIP as the other
> > protocol, or maybe EIGRP, I was running both along with OSPF, but I
> > was able to redistribute a summary from OSPF into the other IGP with
> > the summary-adddress command. In fact I think thats its purpose.
> > ----- Original Message -----
> >
> >> From: Joe Martin
> >> To: wyan@xxxxxxxxxx ; ccielab@xxxxxxxxxxxxxx
> >> Sent: Thursday, May 04, 2000 1:05 AM
> >> Subject: Re: OSPF Routing
> >>
> >> According to Bruce Caslow (speaking to him in person), there isn't
> >> any way for OSPF to summarize out of the OSPF domain.  You may
> >> summarize into OSPF at the ASBR(summary) or summarize out of an
> >> area at the ABR(area range).  The other way to get this IGRP
> >> network functioning would be to specify an IP DEFAULT-NETWORK on
> >> the router that contains both IGRP and OSPF.  Make sure to specify
> >> a wholly unique major network number that does not exist within
> >> the IGRP domain.
> >>
> >> I know i've heard many people say that summary out of OSPF works,
> >> and to admit it I haven't tested it.  Please feel free to comment.
> >>
> >> JOE
> >>
> >> > ----- Original Message -----
> >> > From: wyan@xxxxxxxxxx
> >> > To: ccielab@xxxxxxxxxxxxxx
> >> > Sent: Wednesday, May 03, 2000 8:53 PM
> >> > Subject: OSPF Routing
> >> >
> >> >
> >> >
> >> > You need to summarize the 30-bit and 28-bit subnets to a 24-bit
> >> > subnet with
> >> > a
> >> > static route. Check the case study on P.730 of Doyle's Routing
> >> > TCP/IP. That
> >> > may help.
> >> >
> >> >
> >> > Weidong Yan
> >> >
> >> >
> >> > ---------------------- Forwarded by Weidong Yan/Markham/IBM on
> >> > 05/03/2000
> >> > 11:47 PM ---------------------------
> >> >
> >> > "Ben Rife" <brife@xxxxxxxxxx> on 05/01/2000 04:31:24 PM
> >> >
> >> > Please respond to "Ben Rife" <brife@xxxxxxxxxx>
> >> >
> >> > To:   ccielab@xxxxxxxxxxxxxx
> >> > cc:
> >> > Subject:  OSPF Routing
> >> >
> >> >
> >> >
> >> >
> >> > Hey Gang!
> >> >
> >> > Question:
> >> >
> >> > I have a frame backbone running OSPF Area 0. Two of the spokes
> >> > are
> >> > connected via ISDN as well. (Address spaces vary from /24, /30,
> >> > /28, etc
> >> > for 140.100.0.0 address.)
> >> >
> >> > The hub router is also connected to an IGRP domain (/24 for
> >> > 140.100.0.0).
> >> >
> >> > The problem I am having is that I can't seem to get the ISDN link
> >> > 140.100.5.0/30 advertised to the IGRP domain. The ISDN link is in
> >> > AREA 0. I
> >> > believe that if the link was in another area (ie 3), I could use
> >> > the well
> >> > known, area 3 range... cmd).
> >> > What do I do, since it is in Area 0 and is connected to the ASBR?
> >> >
> >> > Any ideas?
> >> > Thanks,
> >> > Ben
> >> >
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Earl Aboytes
> Senior Technical Consultant
> GTE-Managed Solutions
> 800-483-5325 x8817
> earl.aboytes@xxxxxxxxxxxxxx
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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