From: Earl Aboytes (earl@xxxxxxxxxxxx)
Date: Fri May 05 2000 - 11:22:39 GMT-3
Make sure you have ip classless turned on in both routers. In your ASBR issue
the command ip default-network x.x.x.x. The big caveat here is that the networ
k you specify must be a non-subnetted network that appears in your routing tabl
e. Otherwise it will just appear as a static route in your config. Typically,
in these labs that we work on, everyone uses a class B address and variably su
bnets it. Furthermore, it is typical to have several class C networks being in
jected into OSPF from some other protocol, other than IGRP. Use one of these c
lass C networks as your default network. You cannot use part of the subnetted
class B. It just won't work.
Earl
At 09:52 AM 5/5/00 -0700, Michael Needham wrote:
>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@ca.ibm.com ; ccielab@groupstudy.com
> > >> 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@ca.ibm.com
> > >> > To: ccielab@groupstudy.com
> > >> > 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@bignet.net> on 05/01/2000 04:31:24 PM
> > >> >
> > >> > Please respond to "Ben Rife" <brife@bignet.net>
> > >> >
> > >> > To: ccielab@groupstudy.com
> > >> > 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@telops.gte.com
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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