From: Chua, Parry (Parry.Chua@xxxxxxxxxx)
Date: Fri Feb 08 2002 - 00:41:26 GMT-3
Since 175.3.5.0/24 is the only subnet need to be redistribute into OSPF
at R6 (mutial redisribution point). One possible
cause could be the metric of this subnet is lower when redistributed
back from OSPF to IGRP. I suggest the following :
1. Filter 175.3.5.0/24 when redistrbute from OSPF to IGRP.
2. Set the metric to higher(less prefer) when redistribute from OSPF to
IGRP, ie lower bandwidth and higer delay(sum).
To see the result quicker, change the IGRP timer to 1/10 of the default
value.
Parry Chua
-----Original Message-----
From: Alex Rhyubisef [mailto:foselkr@yahoo.co.kr]
Sent: Thursday, February 07, 2002 7:43 PM
To: ccielab@groupstudy.com
Cc: s
Subject: hello......igrp-ospf(mutual-redistribution) problem
Hi all,
I have a problem on igrp & ospf mutual redistribution.
my R5-router(IGRP Only)'s loopback0 is redistributed
to R6(OSPF & IGRP).
R5 is connected to R6 via Fastethernet(igrp running).
At first, R6 has the Loopback network(175.3.5.0)
but after a short time, the network is possibly down
and disappeared.
so i try debug ip igrp both routers.
the R5 keeps on sending 175.3.5.0 to r6 , but r6 fails
to take the route.
why doesn't R6 receive the R5's loopback0?
when i clear ip route on R6,
the message "IGRP: received update from 175.3.56.5 on
FastEthernet0/1.10" is appeared.
but after a short time, the network is possibly down
and disappeared.
Any suggestions on what I am doing wrong?
========================================================================
====
R5#sh run
interface Loopback0
ip address 175.3.5.5 255.255.255.0
interface FastEthernet0/0
ip address 175.3.56.5 255.255.255.0
router igrp 500
network 175.3.0.0
Rack01R5#sh ip route
Gateway of last resort is not set
C 175.3.5.0 is directly connected, Loopback0
I 175.3.6.0 [100/610] via 175.3.56.6, 00:01:06,
FastEthernet0/0
I 175.3.3.0 [100/2010] via 175.3.56.6, 00:01:06,
FastEthernet0/0
C 175.3.56.0 is directly connected,
FastEthernet0/0
I 175.3.66.0 [100/1175] via 175.3.56.6,
00:01:07, FastEthernet0/0
========================================================================
====
R6#sh run
interface Serial0/0
ip address 175.3.66.6 255.255.255.0
interface FastEthernet0/0
ip address 175.3.6.5 255.255.255.0
interface FastEthernet0/1
no ip address
!
interface FastEthernet0/1.10
encapsulation isl 10
ip address 175.3.56.6 255.255.255.0
!
interface FastEthernet0/1.20
encapsulation isl 20
router ospf 300
redistribute igrp 500 subnets
network 175.3.6.0 0.0.0.255 area 1
network 175.3.66.0 0.0.0.255 area 2
router igrp 500
redistribute ospf 300 metric 10000 1000 255 1 1500
passive-interface FastEthernet0/0
passive-interface serial0/0
network 175.3.0.0
R6#sh ip route
Gateway of last resort is not set
O 175.3.3.0/24 [110/65] via 175.3.34.4,
00:08:04, Serial0/0
I 175.3.5.0/24 [100/610] via 175.3.56.5,
00:00:00, FastEthernet0/1.10
C 175.3.6.0/24 is directly connected,
FastEthernet0/0
C 175.3.56.0/24 is directly connected,
FastEthernet0/1.10
C 175.3.66.0/24 is directly connected, Serial0/0
R6#sh ip route
Gateway of last resort is not set
O 175.3.3.0/24 [110/65] via 175.3.34.4,
00:08:04, Serial0/0
I 175.3.5.0/24 is possibly down,
routing via 175.3.56.5, FastEthernet0/1.1
C 175.3.6.0/24 is directly connected,
FastEthernet0/0
C 175.3.56.0/24 is directly connected,
FastEthernet0/1.10
C 175.3.66.0/24 is directly connected, Serial0/0
========================================================================
====
Rack01R6#debug ip igr transactions
Rack01R6#debug ip routing
01:20:28: RT: flushed route to 175.3.5.0 via
175.3.56.5 (FastEthernet0/1.10)
01:20:28: RT: no routes to 175.3.5.0, entering
holddown
01:20:28: IGRP: edition is now 2
01:20:28: IGRP: sending update to 255.255.255.255 via
FastEthernet0/1.10 (175.3.56.6)
01:20:28: subnet 175.3.5.0, metric=4294967295
01:20:28: subnet 175.3.6.0, metric=501
01:20:28: subnet 175.3.3.0, metric=2000
01:20:28: subnet 175.3.66.0, metric=1125
01:20:28: network 150.100.0.0, metric=2000
========================================================================
====
Rack01R5#debug ip igr transactions
02:25:40: IGRP: received update from 175.3.56.6 on
FastEthernet0/0
02:25:40: subnet 175.3.6.0, metric 610 (neighbor
501)
02:25:40: subnet 175.3.3.0, metric 2010
(neighbor 2000)
02:25:40: subnet 175.3.66.0, metric 1175
(neighbor 1125)
02:26:29: IGRP: sending update to 255.255.255.255 via
FastEthernet0/0 (175.3.56.5)
02:26:29: subnet 175.3.5.0, metric=501
02:26:29: IGRP: sending update to 255.255.255.255 via
Loopback0 (175.3.5.5)
02:26:29: subnet 175.3.6.0, metric=610
02:26:29: subnet 175.3.3.0, metric=2010
02:26:29: subnet 175.3.66.0, metric=1175
Rack01R5#debug ip igr transactions
02:27:25: IGRP: received update from 175.3.56.6 on
FastEthernet0/0
02:27:25: subnet 175.3.5.0, metric 4294967295
(inaccessible)
02:27:25: subnet 175.3.6.0, metric 610 (neighbor
501)
02:27:25: subnet 175.3.3.0, metric 2010
(neighbor 2000)
02:27:25: subnet 175.3.66.0, metric 1175
(neighbor 1125)
02:27:58: IGRP: sending update to 255.255.255.255 via
FastEthernet0/0 (175.3.56.5)
02:27:58: subnet 175.3.5.0, metric=501
02:27:58: IGRP: sending update to 255.255.255.255 via
Loopback0 (175.3.5.5)
02:27:58: subnet 175.3.6.0, metric=610
02:27:58: subnet 175.3.3.0, metric=2010
02:27:58: subnet 175.3.66.0, metric=1175
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:15 GMT-3