RE: Injecting VLSM routes into IGRP

From: Dave Stoddard (dstoddard@thrupoint.net)
Date: Fri Sep 27 2002 - 15:11:47 GMT-3


I've received some several opinions on how to & not to handle this issue.
One solution was to use the area # range command within the ospf routing
process. This does solve the issue. However, I've been told by others that
because the use of the area # range command causes a route to appear in the
routing table pointing to the null0 interface, & this is not allowed in the
lab. So the summary question I'm posting to the list is.....

Is the area # range command allowed to be used & or other commands (such as
static) that create routes in the routing table pointing to interface null0
allowed in the lab?

TIA !!!!!!!!!!!

-----Original Message-----
From: Dave Stoddard [mailto:dstoddard@thrupoint.net]
Sent: Friday, September 27, 2002 8:46 AM
To: 'ccielab@groupstudy.com'
Subject: RE: Injecting VLSM routes into IGRP

I've received a response to my question that would have me summarize the
s0/0 network under ospf process.

router ospf 100
summary address 135.3.12.0 255.255.255.0 <---- summary with same mask as in
the interface between the ASBR and IGRP routers.

I tried this & was unsuccessful. I have since found this link
http://www.cisco.com/warp/public/105/52.html. This link states to use
static routes pointing to null0. I've tried this & it works, but...... Are
static routes pointing to null0 allowed in the lab?

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Dave Stoddard
Sent: Thursday, September 26, 2002 10:35 PM
To: ccielab@groupstudy.com
Subject: Injecting VLSM routes into IGRP

I have the following (summarized) configuration listed below. R1 is running
OSPF & is redistributing into IGRP, going to R2. All but one of the subnets
being redistributed have 24-bit masks, specifically the serial0/0 interface
of R1 has a 29-bit mask. How can I get this 29-bit masked subnet into the
routing table of R2?

TIA for your help!!!

!
hostname r1
!
interface Loopback0
 ip address 135.3.6.6 255.255.255.0
!
interface FastEthernet0/0.10
 encapsulation isl 10
 ip address 135.3.10.6 255.255.255.0
 no ip redirects
!
interface Serial0/0
 ip address 135.3.12.6 255.255.255.248
 encapsulation frame-relay
 ip ospf network non-broadcast
 ipx network 12
 frame-relay map ip 135.3.12.3 400 broadcast
 frame-relay map ip 135.3.12.4 400 broadcast
 frame-relay map ip 135.3.12.6 400 broadcast
 no frame-relay inverse-arp
 frame-relay lmi-type cisco
!
router ospf 100
 router-id 135.3.6.6
 redistribute igrp 100 metric 100 subnets
 passive-interface FastEthernet0/0.10
 network 135.3.12.0 0.0.0.7 area 1
!
router igrp 100
 redistribute ospf 100 metric 10000 1000 250 1 1500
 passive-interface Serial0/0
 network 135.3.0.0
 metric weights 0 1 1 1 0 0

!
hostname r2
!
interface Loopback0
 ip address 135.3.5.5 255.255.255.0
!
interface Ethernet0
 ip address 135.3.10.5 255.255.255.0
!
router igrp 100
 network 135.3.0.0
 metric weights 0 1 1 1 0 0



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