From: Desyatnik, Yan (Yan.Desyatnik@xxxxxxx)
Date: Tue Jan 16 2001 - 15:15:04 GMT-3
Network that you select as default has to be in your downstream neighbor
routing table or it will no install it. You are correct about everything
else. Also, if running old code 11.0 and below make sure IP Classless is on.
Try pointing default network to 205.15.150.0 on R5.
Yan
-----Original Message-----
From: Connary, Julie Ann [mailto:jconnary@cisco.com]
Sent: Tuesday, January 16, 2001 1:00 PM
To: ccielab@groupstudy.com
Subject: propagating default-networks - RIP V2 and
IGRP -
Hi All,
I know there have been many discussions on this - but what I
don't
understand is how to get IGRP to propagate a
default-network. I understand
the defualt-network has to point to a network that is not in
the same
address space as IGRP and it must be classfull.
But why does it not propagate to downstream neighbors?
Here is the scenario - R5 is redistributing from IGRP into
OSPF and RIP V2
into OSPF. I do not want
to redistribute OSPF into IGRP or RIP V2 - but use a
default-network instead.
R7---Rip V2
|
|E 0 - 170.100.42.241/28
|
R5 -------- S0.2 ------------R3 -----s0
------------------r6-------205.0.5.0 AND non 24 bit 170.100
networks off of R6
| 170.100.65.0/24 170.100.68.0/24
| OSPF
|
|
S0.1 - igrp - 170.100.1.0/24
|
R4
So, I put in R5 the following command:
ip default-network 205.0.5.0
and I got a gateway of last resort in R5. (I also tried
setting the ip
default-network to 170.100.65.0, but that just installed a
static route and
no gateway of last resort). However IGRP is not propagating
this default to
R4. Is this because 205.0.5.0 is an OSPF learned
route? R4 has no knowledge of the 210.0.5.0 network -
however, I thought
that R5 would source down
to R4 that it had a default and R4 would have a gateway of
last resort to
R5. R7, the Rip V2 router does receive the default network
and it points it
toward R5. Am I missing something here?
Here is my routing table:
Gateway of last resort is 170.100.65.3 to network 210.0.5.0
170.100.0.0/16 is variably sub
01netted, 13 subnets, 3 masks
I 170.100.200.0/24 [100/8576] via 170.100.1.4,
00:00:50, Serial0.1
C 170.100.42.240/28 is directly connected, Ethernet0
O IA 170.100.233.1/32 [110/75] via 170.100.65.2,
00:25:04, Serial0.2
O IA 170.100.233.0/24 [110/65] via 170.100.65.3,
00:25:04, Serial0.2
O E2 170.100.129.0/24 [110/20] via 170.100.65.2,
00:25:04, Serial0.2
O E2 170.100.150.0/24 [110/20] via 170.100.65.3,
00:25:04, Serial0.2
O IA 170.100.68.0/24 [110/128] via 170.100.65.3,
00:25:04, Serial0.2
O IA 170.100.67.6/32 [110/129] via 17:05:06:
%SYS-5-CONFIG_I: Configured
from
console by console0.100.65.3, 00:25:04, Serial0.2
C 170.100.66.0/28 is directly connected, BRI0
O IA 170.100.64.0/24 [110/74] via 170.100.65.2, 00:25:04,
Serial0.2
[110/74] via 170.100.65.3,
00:25:04, Serial0.2
C 170.100.65.0/24 is directly connected, Serial0.2
C 170.100.1.0/24 is directly connected, Serial0.1
O 170.100.42.0/24 is a summary, 00:25:01, Null0
R 1.0.0.0/8 [120/1] via 170.100.42.242, 00:00:10,
Ethernet0
R 20.0.0.0/8 [120/1] via 170.100.42.242, 00:00:10,
Ethernet0
O*E2 210.0.5.0/24 [110/20] via 170.100.65.3, 00:25:07,
Serial0.2
I 205.15.150.0/24 [100/14000] via 170.100.1.4, 00:00:54,
Serial0.1
Here is the routing table on R4
Gateway of last resort is not set
170.100.0.0/24 is subnetted, 3 subnets
C 170.100.200.0 is directly connected, Ethernet0
I 170.100.65.0 [100/10476] via 170.100.1.5, 00:01:13,
Serial0
C 170.100.1.0 is directly connected, Serial0
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
B 205.15.150.0/24 [20/0] via 170.100.200.7, 00:36:34
Also - does anyone understand how to use the
defualt-information command
under igrp?
It says it requires an access-list - but the examples in the
docs do not
use access-lists.
Thanks,
Julie Ann
------------------------------------------------------------------------
Julie Ann Connary
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