From: Alejandro Cadarso (a.cadarso@xxxxxxxxxxxxxx)
Date: Tue Apr 10 2001 - 16:13:42 GMT-3
Hi,
I have two routers connected through a serial interface, I call them
1750LAB and 3600
The 1750LAB is running OSPF and RIP, it has many routes learned from
other OSPF routers and even external routes from other ASBR.
Well between 1750LAB and 3600 I configured RIP, v1. they share a subnet
from 172.16.0.0, 172.16.36.0/24.
I expected that 3600 would receive routes to all subnets from the same
mayor network with mask 24, but the 1750 LAB only send in the RIP updates
those networks directly connected to it or from the other router which is
connected to it through a subnet with a mask 24. anybody knows why?
Above I put the show ip Route for the two Routers and the relevant
configuration:
1750LAB#
interface Serial1
ip address 172.16.36.1 255.255.255.0
no ip directed-broadcast
clockrate 128000
!
router ospf 1
summary-address 172.16.25.0 255.255.255.0
summary-address 172.16.17.0 255.255.255.0
redistribute rip subnets
network 172.16.2.1 0.0.0.0 area 2
network 172.16.17.1 0.0.0.0 area 0
network 172.16.22.1 0.0.0.0 area 0
network 172.16.25.1 0.0.0.0 area 0
network 192.168.17.0 0.0.0.255 area 2
neighbor 172.16.25.2 priority 1
default-metric 25
area 0 authentication message-digest
area 2 virtual-link 172.16.21.1 message-digest-key 1 md5 virtual
!
router rip
redistribute ospf 1
passive-interface Async5
passive-interface Dialer0
passive-interface FastEthernet0
passive-interface Serial0
network 172.16.0.0
distance 100
1750LAB#sh ip ro
172.16.0.0/16 is variably subnetted, 12 subnets, 3 masks
C 172.16.36.0/24 is directly connected, Serial1
O 172.16.25.0/24 is a summary, 04:19:25, Null0
C 172.16.25.0/25 is directly connected, Serial0
O E2 172.16.26.0/24 [110/25] via 172.16.25.2, 04:19:51, Serial0
O E2 172.16.27.0/24 [110/25] via 172.16.25.2, 04:19:51, Serial0
O IA 172.16.21.0/24 [110/2] via 192.168.17.3, 04:19:51, FastEthernet0
C 172.16.22.0/24 is directly connected, Loopback0
O 172.16.17.0/24 is a summary, 04:19:25, Null0
C 172.16.17.0/29 is directly connected, Dialer0
O IA 172.16.5.0/24 [110/782] via 172.16.25.2, 04:19:51, Serial0
R 172.16.6.0/24 [100/1] via 172.16.36.3, 00:00:22, Serial1
C 172.16.2.0/24 is directly connected, FastEthernet0
C 192.168.17.0/24 is directly connected, FastEthernet0
3600#
interface Serial0/0
ip address 172.16.36.3 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
no fair-queue
!
router rip
network 172.16.0.0
3600#sh ip ro
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 4 subnets
C 172.16.36.0 is directly connected, Serial0/0
R 172.16.22.0 [120/1] via 172.16.36.1, 00:00:03, Serial0/0
C 172.16.6.0 is directly connected, Loopback0
R 172.16.2.0 [120/1] via 172.16.36.1, 00:00:03, Serial0/0
Also I have checked with the command show ip protocols and everithing
seems OK_
1750LAB#sh ip pro
Routing Protocol is "ospf 1"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Default redistribution metric is 25
Redistributing: ospf 1, rip
Address Summarization:
Routing for Networks:
172.16.2.1/32
172.16.17.1/32
172.16.22.1/32
172.16.25.1/32
192.168.17.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 110 04:22:41
172.16.21.1 110 04:23:07
172.16.5.1 110 04:23:07
Distance: (default is 110)
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 21 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is
Incoming update filter list for all interfaces is
Redistributing: ospf 1 (internal, external 1, external 2)
Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Loopback0 1 1 2
Serial1 1 1 2
Routing for Networks:
172.16.0.0
Passive Interface(s):
Async5
Dialer0
FastEthernet0
Passive Interface(s):
Serial0
Routing Information Sources:
Gateway Distance Last Update
172.16.36.3 100 00:00:01
Distance: (default is 100)
Any Ideas?
Regards Alejandro
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:29:43 GMT-3