Another OSPF into IGRP issue

From: yakoout (yesmat@xxxxxxxxxxxxxx)
Date: Sun Feb 24 2002 - 01:33:35 GMT-3


   
Hi all,

Sorry guys if the point has been killed before but I actually can't simulate
the redistribution problem that every body was talking about for such a long
time, in other words my scenario is working and I can't get it NOT to work.

Scenario:

SIMPLE.
R4 running ospf AND igrp (redistributing mutually both ways)
OSPF area 0 with 137.20.5.0/27.
IGRP with 137.20.6.0/24

To summarize /27 into /24 and succesfully redistribute into igrp, I used
"summary-address 137.20.5.0 255.255.255.0" on R4, WITHOUT using
"redistribute connected..."

PROBLEM:

Even though network 137.20.5.0 is NOT EXTERNAL (it is connected) it still
works and I can see the summarized route in R4 routing table to NULL0 and
hence I can also see it in IGRP routers.

What am I doing wrong?

Thanks for your input

Yakout
R4:

router ospf 100
 summary-address 137.20.5.0 255.255.255.0
 redistribute igrp 100 subnets
 network 137.20.5.4 0.0.0.0 area 0
 neighbor 137.20.5.5 priority 1
 neighbor 137.20.5.2 priority 5

router igrp 100
 redistribute ospf 100
 passive-interface Serial0.1
 network 137.20.0.0
 default-metric 1000 1 255 255 1500

r4#sh ip route
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, * - candidate
default
       U - per-user static route, o - ODR

Gateway of last resort is not set

     137.20.0.0/16 is variably subnetted, 6 subnets, 3 masks
C 137.20.10.4/32 is directly connected, Loopback1
O IA 137.20.10.2/32 [110/65] via 137.20.5.2, 00:07:16, Serial0.1
O 137.20.5.0/24 is a summary, 00:07:10, Null0
C 137.20.5.0/27 is directly connected, Serial0.1
C 137.20.6.0/24 is directly connected, Serial0.2
     200.200.100.0/32 is subnetted, 1 subnets
C 200.200.100.1 is directly connected, Loopback0
     172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Loopback3
C 192.168.1.0/24 is directly connected, Ethernet0



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