From: Chua, Parry (Parry.Chua@xxxxxxxxxx)
Date: Tue Feb 19 2002 - 04:08:39 GMT-3
Hi,
>! What you cannot do, is to distribute subnets with different mask
>! then interface in the router runing IGRP.
>From my test, as long as the routes that advertise match to the mask, it
will be
advertise and hence could be redistributed. For example, your mask is
/24, so
as long as the routes receive with all "0" in last eight bits, it is
consider as
the same mask, right ?
Parry Chua
-----Original Message-----
From: Przemyslaw Karwasiecki [mailto:karwas@ifxcorp.com]
Sent: Tuesday, February 19, 2002 2:08 PM
To: David Siwula
Cc: 'ccielab@groupstudy.com'
Subject: Re: IGRP and /32 mask loopback
David,
Yes, you can distribute subnets of major networks.
What you cannot do, is to distribute subnets with different mask
then interface in the router runing IGRP.
Please see (r2 is IGRP only, R1 is redistributing OSPF into IGRP):
redistributing router:
---------------------
r1#sh ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 10.10.1.3 to network 0.0.0.0
I 137.20.0.0/16 [100/8576] via 10.20.1.1, 00:01:03, Serial0.1
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
C 10.10.0.0/16 is directly connected, Serial0.2
O 10.10.1.3/32 [110/64] via 10.10.1.3, 00:03:30, Serial0.2
O 10.10.1.5/32 [110/64] via 10.10.1.5, 00:03:30, Serial0.2
C 10.1.0.0/16 is directly connected, Ethernet0
C 10.20.0.0/16 is directly connected, Serial0.1
I 10.33.0.0/16 [100/12476] via 10.20.1.1, 00:01:04, Serial0.1
11.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
O 11.1.0.0/16 [110/74] via 10.10.1.5, 00:03:31, Serial0.2
I 11.0.0.0/8 is possibly down,
routing via 10.20.1.1, Serial0.1
C 192.168.1.0/24 is directly connected, Loopback0
O*E1 0.0.0.0/0 [110/564] via 10.10.1.3, 00:03:32, Serial0.2
and router 2 (IGRP only):
-------------------------
r2#sh ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
137.20.0.0/24 is subnetted, 1 subnets
C 137.20.20.0 is directly connected, Ethernet0
172.168.0.0/24 is subnetted, 1 subnets
C 172.168.32.0 is directly connected, Loopback0
10.0.0.0/16 is subnetted, 4 subnets
I 10.10.0.0 [100/10476] via 10.20.1.2, 00:00:09, Serial0
I 10.1.0.0 [100/8576] via 10.20.1.2, 00:00:09, Serial0
C 10.20.0.0 is directly connected, Serial0
I 10.33.0.0 [100/10476] via 10.20.1.2, 00:04:25, Serial0
I 11.0.0.0/8 is possibly down, routing via 10.20.1.2, Serial0
Przemek
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