From: Bobby Mann (Bobby.Mann@xxxxxxxxxxxxxxx)
Date: Tue Feb 05 2002 - 15:27:18 GMT-3
You can make a loop back address with a different major network and redistribut
e it into igrp and then use the ip default-network. You can do this on R1 so t
hat R2 and R3 will receive the route.
bob,
-----Original Message-----
From: CCIE Cisco [mailto:c_ccie@hotmail.com]
Sent: Tuesday, February 05, 2002 10:04 AM
To: ksng@avaya.com; ccielab@groupstudy.com
Subject: Re: Sending default route in IGRP for subnets
Use ip default-network 172.16.1.0 on R2 instead 172.16.0.0
>From: "Ng, Kim Seng David (David)" <ksng@avaya.com>
>Reply-To: "Ng, Kim Seng David (David)" <ksng@avaya.com>
>To: <ccielab@groupstudy.com>
>Subject: Sending default route in IGRP for subnets
>Date: Tue, 5 Feb 2002 22:30:01 +0800
>
> OSPF IGRP
> R1---------------------R2------------------------R3
> 172.16.1.0/24 172.16.20.0/24
>
>Hi Group,
>
> Need your help for the above config....
>
>Objective: To advertise a IGRP default route from R2 into R3 to get to
>destination networks in R1
>
>Routing table for R2:
>
>Gateway of last resort is 172.16.1.2 to network 172.16.0.0
>
> * 172.16.0.0/16 is variably subnetted, 13 subnets, 5 masks
>C 172.16.3.192/26 is directly connected, Loopback4
>O 172.16.10.17/32 [110/65] via 172.16.1.2, 00:16:55, Serial0
>C 172.16.20.0/24 is directly connected, Serial1
>I 172.16.21.0/24 [100/8576] via 172.16.20.2, 00:01:13, Serial1
>I 172.16.22.0/24 [100/8976] via 172.16.20.2, 00:01:13, Serial1
>O 172.16.10.24/29 [110/74] via 172.16.1.2, 00:16:55, Serial0
>C 172.16.4.0/26 is directly connected, Loopback1
>S* 172.16.0.0/16 [1/0] via 172.16.1.2
>C 172.16.1.0/24 is directly connected, Serial0
>O 172.16.3.1/32 [110/65] via 172.16.1.2, 00:16:56, Serial0
>C 172.16.2.0/24 is directly connected, Loopback0
>C 172.16.10.8/29 is directly connected, Ethernet0
>O 172.16.4.65/32 [110/65] via 172.16.1.2, 00:16:56, Serial0
>
>Routing table for R3:
>
>Gateway of last resort is not set
>
> 172.16.0.0/16 is subnetted, 5 subnets
>C 172.16.20.0 is directly connected, Serial0
>C 172.16.21.0 is directly connected, Ethernet0
>C 172.16.22.0 is directly connected, Loopback0
>I 172.16.1.0 [100/10476] via 172.16.20.1, 00:00:49, Serial0
>I 172.16.2.0 [100/8976] via 172.16.20.1, 00:00:49, Serial0
>
>As you can see, I have created a default route on R2 but somehow this
>default route is not injected by R2 to R3. Therefore, R3 does not know
>how to get to R1 networks. I did a "debug ip igrp transaction" on R2 and
>R3 and verified that the default route was never advertised by R2 to R3.
>I had ip classless enable on R2 and R3.
>
>The following is part of R2 config:
>
>router ospf 1
> redistribute igrp 100 subnets
> network 172.16.1.0 0.0.0.255 area 0
> network 172.16.2.0 0.0.0.255 area 0
> network 172.16.4.0 0.0.0.63 area 0
> network 172.16.10.8 0.0.0.7 area 0
>!
>router igrp 100
> redistribute static
> redistribute ospf 1
> passive-interface Ethernet0
> passive-interface Loopback0
> passive-interface Loopback1
> passive-interface Serial0
> network 172.16.0.0
> default-metric 9600 0 255 1 1500
>!
>ip classless
>ip default-network 172.16.0.0
>ip route 172.16.0.0 255.255.0.0 172.16.1.2
>
>
>Is it something to do with 'ip default-network' having the same classful
>network as the igrp 'network' command??
>
>Thanks in advance
>David
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:12 GMT-3