From: Brian Best (bbest@xxxxxxxxxxxxx)
Date: Sun Jan 09 2000 - 16:49:59 GMT-3
Brad,
Yeah. I agree that it seems that this technique should work. However, I
have also experienced this problem and not had success with getting a
summary-address to work in this type of situation (VLSM/FLSM with IGRP).
Just trying to add to the mix and propose another solution.
Regards,
Brian Best
> -----Original Message-----
> From: Brad Hedlund [mailto:BHedlund@LifeTimeFitness.com]
> Sent: Sunday, January 09, 2000 11:33 AM
> To: Brian Best; ccielab@groupstudy.com
> Cc: Darrel Hinshaw
> Subject: RE: VLSM ---> FLSM or OSPF --> IGRP
>
>
>
> Brain,
>
> Your point is a good one, however I think Darrel has already
> preempted that
> issue with
> 'summary-address 150.100.5.0 255.255.255.0' on R2, as you can
> see in his
> configurations below.
> This will summarize routes going into and out of an ASBR such
> as R2. Thus
> R3 *should* be seeing a 150.100.5.0/24 route. ?!
>
> This scenario should work without an 'ip default-network' on R1.
>
> -Brad
>
>
>
> >
> > Darrel,
> >
> > As I am sure you are aware, the problem lies in the fact that
> > the routes to
> > your loopback interfaces not get redistributed to R3 due to
> > the classful
> > nature of IGRP. You will see all the /24 routes because all
> > the interfaces
> > in your IGRP routing processes possess a /24 mask. Your problem is
> > reachability from R3 w/o the use of static routes.
> >
> > I would say that your best bet is to create another
> loopback on R1 and
> > include it in the OSPF routing process. Then on R2 use the ip
> > default-network command for the route you just added. Make
> > sure that you
> > use the classful address with this command - don't include a
> > subnet or it
> > will not advertise properly.
> >
> > You should then see the route appear as a candidate default
> > on R2 and and
> > this will be propogated to R3. Also make sure that ip
> > classless is enabled
> > on R3.
> >
> > Liberal use of debug ip packet is great to see what is
> happening here.
> >
> > Regards,
> >
> > Brian Best
> > > -----Original Message-----
> > > From: Darrel Hinshaw [mailto:dhinshaw@istrength.net]
> > > Sent: Thursday, January 06, 2000 9:30 PM
> > > To: ccielab@groupstudy.com
> > > Subject: VLSM ---> FLSM or OSPF --> IGRP
> > >
> > >
> > > All:
> > >
> > >
> > > First I'm sorry for making this so long.
> > >
> > >
> > >
> > > Great deal of difficulty here. The usual parameter of NO
> > > static routes of
> > > any kind are in effect.
> > >
> > >
> > > R1-->S0------(OSPF
> > 0)------S0<--R2-->E0------(IGRP)------E0<--R3-->E1
> > >
> > > Interface Addresses:
> > > R1/S0: 150.100.4.5/24 OSPF Area 0
> > > R1/L0: 150.100.5.5/30 OSPF Area 0
> > > R2/S0: 150.100.4.3/24 OSPF Area 0
> > > R2/L0: 150.100.5.9/30 OSPF Area 0
> > > R2/E0: 150.100.128.1/24 IGRP
> > > R3/E0: 150.100.128.2/24 IGRP
> > > R3/E1: 150.100.129.1/24 IGRP
> > >
> > > Problem: How do I distribute OSPF into IGRP on R2? I have
> > > configured but I
> > > am unable to get any 150.100.5.x addresses to show up in R3's
> > > routing table.
> > > Below are the relevant Configs.
> > >
> > > Router 1:
> > >
> > > router ospf 5
> > > network 150.100.4.0 0.0.0.255 area 0
> > > network 150.100.5.5 0.0.0.0 area 0
> > > network 150.100.14.0 0.0.0.255 area 3
> > > area 0 authentication message-digest
> > > area 3 range 150.100.14.0 255.255.255.0
> > > area 3 virtual-link 150.100.3.1
> > >
> > > Router 2:
> > >
> > > router ospf 5
> > > summary-address 150.100.5.0 255.255.255.0
> > > redistribute igrp 5 subnets route-map igrpn2ospf
> > > network 150.100.4.0 0.0.0.255 area 0
> > > network 150.100.5.9 0.0.0.0 area 0
> > > area 0 authentication message-digest
> > > area 0 range 150.100.4.0 255.255.255.0
> > > area 0 range 150.100.5.0 255.255.255.0
> > >
> > > router igrp 5
> > > redistribute ospf 5 metric 10000 10 255 1 1500 route-map
> ospfn2igrp
> > > passive-interface Loopback0
> > > passive-interface Serial0
> > > passive-interface Serial0.110
> > > network 150.100.0.0
> > > network 0.0.0.0
> > >
> > > ip classless
> > >
> > > access-list 1 permit 150.100.128.0 0.0.127.255
> > > access-list 2 deny 150.100.128.0 0.0.127.255
> > > access-list 2 permit any
> > > !
> > > route-map igrpn2ospf permit 10
> > > match ip address 1
> > > !
> > > route-map ospfn2igrp permit 10
> > > match ip address 2
> > >
> > > Router 3:
> > >
> > > router igrp 5
> > > network 150.100.0.0
> > >
> > > ip classless
> > >
> > >
> > >
> > > ANY help would be appreciated.
> > >
> > >
> > > Regards,
> > >
> > > Darrel Hinshaw
> > >
> > >
> > >
> > > PS If you have actually read this far . . . THANKS.
> > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:22:43 GMT-3