From: kym blair (kymblair@xxxxxxxxxxx)
Date: Fri May 31 2002 - 07:19:24 GMT-3
Bola and Ademola,
Setting the redistribution router's E0 mask to /24 won't do what you want.
First, all of your RIP routes arrived in OSPF with /32 masks, so your pings
only worked because they started with 10.1.1.X, which is the same as the
valid 10.1.1.0 /24 on E0. Any network with some different address (e.g.,
10.1.2.X /24) wouldn't work. Second, this approach will only allow
redistribution of interfaces with the same mask (/24); it won't redistribute
routes with other masks.
SOLUTION: You should be allowed to add the following even if your
instructions say to only use RIP version 1 (but better verify with the
proctor):
Router R-RED (running RIP Version 1)
int e 0
ip rip send version 2
ip rip rece version 2
Router R-RIP (running RIP Version 1)
int e 0
ip rip send version 2
ip rip rece version 2
Regards, Kym
>>-----Original Message-----
>>From: Bola Adegbonmire
>>Sent: Thursday, May 30, 2002 4:25 PM
>>To: 'Ademola Osindero'
>>Cc: 'ccielab@studygroup.com'
>>Subject: RE: OSPF & RIP Red. With rip longer mask
>>
>>
>>I will try to see if I can get a solution to the caveat you introduced,
>>off
>>the cuff now I don't have a solution, But I guess it will make an
>>interesting
>>search. I tried everything before this solution but it wouldn't work. I
>>believe it still stands, no static routes?
>>
>>-----Original Message-----
>>From: Ademola Osindero [mailto:osindero@lagos.sns.slb.com]
>>Sent: Thursday, May 30, 2002 4:07 PM
>>To: Bola Adegbonmire; ccielab@groupstudy.com
>>Subject: RE:OSPF & RIP Red. With rip longer mask
>>
>>
>>Hi Bola,
>>
>>"The solution is to change the mask of the router connecting to the RIP
>>domain on the redristributing router to match that of the ospf domain."
>>
>>What if you are not permitted to change the mask and things are still
>>expected
>>to work, can there be another way around it?
>>
>>Ademola
>>
>>At 02:07 PM 5/30/2002 +0100, Bola Adegbonmire wrote:
>>
>>
>>Hi,
>>Somebody posted this scenario earlier. Here is what I came up with in
>>the lab.
>>
>>This are configs from three 2611 routers used to simulate this scenario.
>>I didn't post this earlier 'cos I wanted to be sure that if I actuall
>>had a PC behind one of the networks I will be able to get to it. Which
>>works.
>>
>>The solution is to change the mask of the router connecting to the RIP
>>domain on the redristributing router to match that of the ospf domain.
>>That way the ospf routers learn the RIP routes with a /32 mask, but
>>since the routers have ip classless configured packtets get routed with
>>longest match rule. There should be no conflitcs as long as the rip
>>networks major networks if the ospf mask were used on the RIP domian are
>>not duplicated in the ospf domain. The ping outputs to 10.1.1.18 for the
>>PC attached to the R-RIP int e0/1.
>>
>>Rip domain uses /28 mask while OSPF uses /24 mask. All are of the
>>10.0.0.0 major network.
>>
>>If there are any assumptions anybody knows of I have made, pls let me
>>know. I want to learn. Or nay other way without using static routes.
>>
>>Have fun
>>
>>Network illustration.
>>R-ospf--------------------------------R-Red-----------------------------
>>----------R-RIP
>>
>>Here are the configs.
>>
>>For R-ospf
>>
>>sh run
>>Building configuration...
>>
>>Current configuration : 788 bytes
>>!
>>version 12.1
>>service timestamps debug uptime
>>service timestamps log uptime
>>no service password-encryption
>>!
>>hostname R-ospf
>>!
>>!
>>!
>>!
>>!
>>!
>>memory-size iomem 10
>>ip subnet-zero
>>no ip finger
>>!
>>ip audit notify log
>>ip audit po max-events 100
>>!
>>!
>> --More-- !
>>!
>>!
>>!
>>!
>>!
>>interface Loopback0
>> ip address 10.1.3.1 255.255.255.0
>> ip ospf network point-to-point
>>!
>>interface Loopback2
>> ip address 10.1.5.1 255.255.255.0
>> ip ospf network point-to-point
>>!
>>interface Ethernet0/0
>> ip address 10.1.2.2 255.255.255.0
>>!
>>interface Ethernet0/1
>> ip address 10.1.4.1 255.255.255.0
>> no keepalive
>>!
>>router ospf 2
>> log-adjacency-changes
>> --More--
>> network 10.1.0.0 0.0.255.255 area 0
>>!
>>ip classless
>>no ip http server
>>!
>>!
>>line con 0
>> exec-timeout 0 0
>> transport input none
>>line 33 40
>>line aux 0
>>line vty 0 4
>>!
>>no scheduler allocate
>>end
>>
>>R-ospf#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
>>
>> 10.0.0.0/8 is variably subnetted, 8 subnets, 2 masks
>>C 10.1.3.0/24 is directly connected, Loopback0
>>C 10.1.2.0/24 is directly connected, Ethernet0/0
>>O E1 10.1.1.0/24 [110/75] via 10.1.2.1, 00:15:41, Ethernet0/0
>>C 10.1.5.0/24 is directly connected, Loopback2
>>C 10.1.4.0/24 is directly connected, Ethernet0/1
>>O E1 10.1.1.16/32 [110/75] via 10.1.2.1, 00:06:35, Ethernet0/0
>>O E1 10.1.1.32/32 [110/75] via 10.1.2.1, 00:05:57, Ethernet0/0
>>O E1 10.1.1.48/32 [110/75] via 10.1.2.1, 00:05:58, Ethernet0/0
>>R-ospf#ping 10.1.1.17
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.17, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-ospf#ping 10.1.1.18
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.18, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-ospf#ping 10.1.1.33
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.33, timeout is 2 seconds:
>>.!!!!
>>Success rate is 80 percent (4/5), round-trip min/avg/max = 1/3/4 ms
>>R-ospf#ping 10.1.1.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
>>.!!!!
>>Success rate is 80 percent (4/5), round-trip min/avg/max = 1/2/4 ms
>>R-ospf#trace 10.1.1.18
>>
>>Type escape sequence to abort.
>>Tracing the route to 10.1.1.18
>>
>> 1 10.1.2.1 0 msec 0 msec 4 msec
>> 2 10.1.1.18 4 msec 0 msec 4 msec
>>R-ospf#ping 10.1.1.49
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.49, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms
>>R-ospf#
>>
>>For R-RIP
>>
>>sh run
>>Building configuration...
>>
>>Current configuration : 740 bytes
>>!
>>version 12.1
>>service timestamps debug uptime
>>service timestamps log uptime
>>no service password-encryption
>>!
>>hostname R-RIP
>>!
>>!
>>!
>>!
>>!
>>!
>>memory-size iomem 10
>>ip subnet-zero
>>no ip finger
>>!
>>ip audit notify log
>>ip audit po max-events 100
>>!
>>!
>> --More--!
>>!
>>!
>>voice-port 1/0/0
>>!
>>voice-port 1/0/1
>>!
>>voice-port 1/1/0
>>!
>>voice-port 1/1/1
>>!
>>!
>>!
>>!
>>interface Loopback0
>> ip address 10.1.1.1 255.255.255.240
>>!
>>interface Loopback2
>> ip address 10.1.1.33 255.255.255.240
>>!
>>interface Ethernet0/0
>> ip address 10.1.1.49 255.255.255.240
>>!
>> --More--
>>interface Ethernet0/1
>> ip address 10.1.1.17 255.255.255.240
>>!
>>router rip
>> network 10.0.0.0
>>!
>>ip classless
>>no ip http server
>>!
>>!
>>line con 0
>> exec-timeout 0 0
>> transport input none
>>line aux 0
>>line vty 0 4
>>!
>>no scheduler allocate
>>end
>>
>>R-RIP#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
>>
>> 10.0.0.0/28 is subnetted, 8 subnets
>>R 10.1.3.0 [120/3] via 10.1.1.50, 00:00:02, Ethernet0/0
>>R 10.1.2.0 [120/1] via 10.1.1.50, 00:00:02, Ethernet0/0
>>C 10.1.1.0 is directly connected, Loopback0
>>R 10.1.5.0 [120/3] via 10.1.1.50, 00:00:02, Ethernet0/0
>>R 10.1.4.0 [120/3] via 10.1.1.50, 00:00:02, Ethernet0/0
>>C 10.1.1.16 is directly connected, Ethernet0/1
>>C 10.1.1.32 is directly connected, Loopback2
>>C 10.1.1.48 is directly connected, Ethernet0/0
>>R-RIP#ping 10.1.3.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.3.1, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms
>>R-RIP#ping 10.1.4.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.4.1, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-RIP#ping 10.1.5.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.5.1, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-RIP#
>>
>>For R-Red
>>
>>
>>sh run
>>Building configuration...
>>
>>Current configuration:
>>!
>>version 12.0
>>service timestamps debug uptime
>>service timestamps log uptime
>>no service password-encryption
>>!
>>hostname R-Red
>>!
>>!
>>!
>>!
>>!
>>!
>>memory-size iomem 10
>>ip subnet-zero
>>!
>>ip audit notify log
>>ip audit po max-events 100
>>cns event-service server
>>!
>>!
>> --More---
>>!
>>!
>>!
>>voice-port 1/0/0
>>!
>>voice-port 1/0/1
>>!
>>voice-port 1/1/0
>>!
>>voice-port 1/1/1
>>!
>>process-max-time 200
>>!
>>interface Ethernet0/0
>> ip address 10.1.1.50 255.255.255.0
>> no ip directed-broadcast
>>!
>>interface Ethernet0/1
>> ip address 10.1.2.1 255.255.255.0
>> no ip directed-broadcast
>>!
>>router ospf 2
>> redistribute rip metric 65 metric-type 1 subnets
>> --More--
>>network 10.1.2.0 0.0.0.255 area 0
>>!
>>router rip
>> redistribute ospf 2 metric 3
>> network 10.0.0.0
>>!
>>ip classless
>>no ip http server
>>!
>>!
>>!
>>line con 0
>> exec-timeout 0 0
>> transport input none
>>line aux 0
>>line vty 0 4
>>!
>>!
>>no scheduler allocate
>>end
>>
>>R-Red#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
>>
>> 10.0.0.0/8 is variably subnetted, 8 subnets, 2 masks
>>O 10.1.3.0/24 [110/11] via 10.1.2.2, 00:26:33, Ethernet0/1
>>C 10.1.2.0/24 is directly connected, Ethernet0/1
>>C 10.1.1.0/24 is directly connected, Ethernet0/0
>>O 10.1.5.0/24 [110/11] via 10.1.2.2, 00:26:33, Ethernet0/1
>>O 10.1.4.0/24 [110/20] via 10.1.2.2, 00:26:33, Ethernet0/1
>>R 10.1.1.16/32 [120/1] via 10.1.1.49, 00:00:27, Ethernet0/0
>>R 10.1.1.32/32 [120/1] via 10.1.1.49, 00:00:27, Ethernet0/0
>> [120/1] via 10.1.1.17, 00:00:27, Ethernet0/0
>>R 10.1.1.48/32 [120/1] via 10.1.1.17, 00:00:28, Ethernet0/0
>>R-Red#ping 10.1.1.1
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-Red#ping 10.1.1.18
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.18, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-Red#ping 10.1.1.17
>>
>>Type escape sequence to abort.
>>Sending 5, 100-byte ICMP Echos to 10.1.1.17, timeout is 2 seconds:
>>!!!!!
>>Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
>>R-Red#
>>
>>Bola Adegbonmire
>>WAN, Security and Network management
>>Resourcery Limited
>>18 Adeola Hopewell, Victoria Island.Lagos-Nigeria.
>>Tel:234-1-3200301, 4618281, 7740711-2
>>
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