From: Paglia, John (USPC.PCT.Hopewell) (JPaglia@NA2.US.ML.com)
Date: Tue Sep 17 2002 - 21:52:09 GMT-3
Thank you for the reply. I have yet to try altering the distance on
IGRP and I don't know why. I also like that "Filter OSPF routes on R2 coming
from frame relay to disallow RIP
redistributed routes" suggestion. I will be by my lab in 2 hrs and will try
it out then. In the meantime, just for some clarification to your points:
-ISDN is indeed being used as a backup..a backup intf. situation on r5.
-I am not redistributing from RIP to IGRP...the redist is btwn. RIP and
OSPF, and btwn. OSPF and IGRP.
-Basically, since RIP and IGRP have the lower # of routes (and I'm not a
strong typist), I have redists that look kinda like this:
router ospf 2
router-id 148.1.2.2
redistribute rip subnets route-map r_o
redistribute igrp 2 subnets route-map i_o
default-metric 60
router rip
version 2
redistribute ospf 2 route-map o_r
network 148.1.0.0
default-metric 3
router igrp 2
redistribute ospf 2 route-map o_i
network 148.1.0.0
default-metric 1000 100 254 1 1500
access-list 5 permit 150.100.0.0 0.0.255.255
access-list 5 permit 192.0.0.0 0.255.255.255
access-list 5 permit 148.1.1.0 0.0.0.255
access-list 5 permit 148.1.13.0 0.0.0.255 <--------all the routes coming
from the RIP area
access-list 6 permit 148.1.9.0 0.0.0.255
access-list 6 permit 148.1.5.0 0.0.0.255
access-list 6 permit 148.1.36.0 0.0.0.255 <---------all the routes coming
from the IGRP area
route-map r_o permit 20
match ip address 5
!
route-map o_r deny 20
match ip address 5
!
route-map o_r permit 30
!
route-map i_o permit 20
match ip address 6
!
route-map o_i deny 20
match ip address 6
!
route-map o_i permit 30
Thanks again very much for all your help. I'll keep you posted as to what
happens. Thanks as well to everyone else who is helping me...IT IS GREATLY
APPRECIATED!!!
Pags
> -----Original Message-----
> From: Nick Shah [SMTP:nshah@connect.com.au]
> Sent: Tuesday, September 17, 2002 7:57 PM
> To: Paglia, John (USPC.PCT.Hopewell); ccielab@groupstudy.com
> Subject: Re: IGRP Disaster
>
> John
>
> Whats happening here is prolly... (These are just a pointers, I will try
> to
> lab up ur scenario tonight)
>
> * The networks which are running OSPF are getting included in IGRP/RIP,
> same for RIP network (getting included in IGRP).
> * Are you using distribute lists to allow only specific networks in/out of
> redistributed protocols
> * Are you redistributing between RIP & IGRP on R2 ?
> * The trouble seems to be arising out of OSPF learning the prefixes back
> from IGRP and since OSPF distance is lower than RIP, on other hand IGRP's
> distance is lower than OSPF, so unless you are using that ISDN link for
> some
> backup, filter out (if using for backup, then increase IGRP's distance)
> * Filter OSPF routes on R2 coming from frame relay to disallow RIP
> redistributed routes (which could have been fed back into OSPF, since
> there
> are 2 redistribution points)
>
>
> rgds
> Nick
> ----- Original Message -----
> From: "Paglia, John (USPC.PCT.Hopewell)" <JPaglia@NA2.US.ML.com>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, September 18, 2002 6:08 AM
> Subject: IGRP Disaster
>
>
> > I cam across a troublesome event today in my practices and I am at a bit
> of
> > a loss, thus I am asking for some expertise...
> >
> > isdn --------r5-----eth----r4
> > | |
> > | |
> > | frame
> > | |
> > r2-----------frame----------r3
> > |
> > |
> > serial
> > _|__
> > r1
> >
> > r1 to r2 - RIP
> > r2 to r3 to r4 - OSPF
> > r4 to r5 and isdn to r2 - igrp
> >
> > I have rip mutually redistributing into ospf and all is well, I can ping
> all
> > loopbacks and connecting network addresses. Then I configure IGRP on r2,
> r4
> > and r5 and redistribute w/ ospf using route maps at both points, and the
> fun
> > begins!!!
> >
> > Once this is done, and with the isdn still down, the network btwn r1 and
> r2
> > disappears from every router, making a ping from r1 impossible. All
> other
> > networks are present. When ISDN is up (interface backup on r5 igrp
> > interface), the net btwn r1 and r2 shows up on r5 only. Meanwhile, the
> > loopback on r5 will not show up on r1 and vice versa.
> >
> > Is there some basic IGRP condition that is causing this to happen? Any
> > ideas???
> >
> > Thanks,
> > Pags
This archive was generated by hypermail 2.1.4 : Mon Oct 07 2002 - 07:43:55 GMT-3