routes are not exchanging

Zulqadar Ahmad · ‎11-11-2013

Hi,

I have two routers R1 and R2 configured for RIP but routes are not exchanging.Please find the confguration and show commands.

R1 Configuration

router rip

network 10.0.0.0

network 192.168.1

R2 Configuration

router rip

network 10.0.0.0

network 192.168.1

R1 show ip rip database

R1#sh ip rip database

10.0.0.0/8 auto-summary

10.15.1.0/24 directly connected, Loopback1

10.15.2.0/24 directly connected, Loopback2

10.15.3.0/24 directly connected, Loopback3

10.15.4.0/24 directly connected, Loopback4

10.15.5.0/24 directly connected, Loopback5

10.15.6.0/24 directly connected, Loopback6

10.15.7.0/24 directly connected, Loopback7

10.15.8.0/24 directly connected, Loopback8

10.15.9.0/24 directly connected, Loopback9

10.15.10.0/24 directly connected, Loopback10

10.15.11.0/24 directly connected, Loopback11

10.15.13.0/24 directly connected, Loopback13

10.15.14.0/24 directly connected, Loopback14

10.15.15.0/24 directly connected, Loopback12

10.15.16.0/24 directly connected, Loopback16

10.15.17.0/24 directly connected, Loopback17

10.15.18.0/24 directly connected, Loopback18

10.15.19.0/24 directly connected, Loopback19

10.15.20.0/24 directly connected, Loopback20

10.15.21.0/24 directly connected, Loopback21

10.15.22.0/24 directly connected, Loopback22

10.15.23.0/24 directly connected, Loopback23

192.168.1.0/24 auto-summary

192.168.1.0/24 directly connected, FastEthernet0/0

R2#sh ip rip database

10.0.0.0/8 auto-summary

10.12.1.0/24 directly connected, Loopback1

10.12.2.0/24 directly connected, Loopback2

10.12.3.0/24 directly connected, Loopback3

10.12.4.0/24 directly connected, Loopback4

10.12.5.0/24 directly connected, Loopback5

10.12.6.0/24 directly connected, Loopback6

10.12.7.0/24 directly connected, Loopback7

10.12.8.0/24 directly connected, Loopback8

10.12.9.0/24 directly connected, Loopback9

10.12.10.0/24 directly connected, Loopback10

10.12.11.0/24 directly connected, Loopback11

10.12.12.0/24 directly connected, Loopback12

10.12.13.0/24 directly connected, Loopback13

10.12.14.0/24 directly connected, Loopback14

10.12.15.0/24 directly connected, Loopback15

10.12.16.0/24 directly connected, Loopback16

10.12.17.0/24 directly connected, Loopback17

10.12.18.0/24 directly connected, Loopback18

10.12.19.0/24 directly connected, Loopback19

10.12.21.0/24 directly connected, Loopback21

10.12.22.0/24 directly connected, Loopback22

10.12.23.0/24 directly connected, Loopback23

192.168.1.0/24 auto-summary

192.168.1.0/24 directly connected, FastEthernet0/0

R1#sh ip protocols

Routing Protocol is "rip"

Outgoing update filter list for all interfaces is not set

Incoming update filter list for all interfaces is not set

Sending updates every 30 seconds, next due in 29 seconds

Invalid after 180 seconds, hold down 180, flushed after 240

Redistributing: rip

Default version control: send version 1, receive any version

Interface Send Recv Triggered RIP Key-chain

FastEthernet0/0 1 1 2

Loopback1 1 1 2

Loopback2 1 1 2

Loopback3 1 1 2

Loopback4 1 1 2

Loopback5 1 1 2

Loopback6 1 1 2

Loopback7 1 1 2

Loopback8 1 1 2

Loopback9 1 1 2

Loopback10 1 1 2

Loopback11 1 1 2

Loopback12 1 1 2

Loopback13 1 1 2

Loopback14 1 1 2

Loopback16 1 1 2

Loopback17 1 1 2

Loopback18 1 1 2

Loopback19 1 1 2

Loopback20 1 1 2

Loopback21 1 1 2

Loopback22 1 1 2

Loopback23 1 1 2

Loopback24 1 1 2

Loopback25 1 1 2

Loopback26 1 1 2

Loopback27 1 1 2

Loopback28 1 1 2

Loopback29 1 1 2

Loopback30 1 1 2

Automatic network summarization is in effect

Maximum path: 4

Routing for Networks:

10.0.0.0

192.168.1.0

Routing Information Sources:

Gateway Distance Last Update

192.168.1.1 120 00:00:03

Distance: (default is 120)

R2#sh ip protocols

Routing Protocol is "rip"

Outgoing update filter list for all interfaces is not set

Incoming update filter list for all interfaces is not set

Sending updates every 30 seconds, next due in 18 seconds

Invalid after 180 seconds, hold down 180, flushed after 240

Redistributing: rip

Default version control: send version 1, receive any version

Interface Send Recv Triggered RIP Key-chain

FastEthernet0/0 1 1 2

Loopback1 1 1 2

Loopback2 1 1 2

Loopback3 1 1 2

Loopback4 1 1 2

Loopback5 1 1 2

Loopback6 1 1 2

Loopback7 1 1 2

Loopback8 1 1 2

Loopback9 1 1 2

Loopback10 1 1 2

Loopback11 1 1 2

Loopback12 1 1 2

Loopback13 1 1 2

Loopback14 1 1 2

Interface Send Recv Triggered RIP Key-chain

Loopback15 1 1 2

Loopback16 1 1 2

Loopback17 1 1 2

Loopback18 1 1 2

Loopback19 1 1 2

Loopback21 1 1 2

Loopback22 1 1 2

Loopback23 1 1 2

Loopback24 1 1 2

Loopback25 1 1 2

Loopback26 1 1 2

Loopback27 1 1 2

Loopback28 1 1 2

Loopback29 1 1 2

Loopback30 1 1 2

Automatic network summarization is in effect

Maximum path: 4

Routing for Networks:

10.0.0.0

192.168.1.0

Routing Information Sources:

Gateway Distance Last Update

192.168.1.2 120 00:00:04

Distance: (default is 120)

R1#sh ip route

Codes: C - connected, S - static, 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

i - IS-IS, su - IS-IS summary, 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

10.0.0.0/24 is subnetted, 22 subnets

C 10.15.5.0 is directly connected, Loopback5

C 10.15.4.0 is directly connected, Loopback4

C 10.15.7.0 is directly connected, Loopback7

C 10.15.6.0 is directly connected, Loopback6

C 10.15.1.0 is directly connected, Loopback1

C 10.15.3.0 is directly connected, Loopback3

C 10.15.2.0 is directly connected, Loopback2

C 10.15.13.0 is directly connected, Loopback13

C 10.15.15.0 is directly connected, Loopback12

C 10.15.14.0 is directly connected, Loopback14

C 10.15.9.0 is directly connected, Loopback9

C 10.15.8.0 is directly connected, Loopback8

C 10.15.11.0 is directly connected, Loopback11

C 10.15.10.0 is directly connected, Loopback10

C 10.15.21.0 is directly connected, Loopback21

C 10.15.20.0 is directly connected, Loopback20

C 10.15.23.0 is directly connected, Loopback23

C 10.15.22.0 is directly connected, Loopback22

C 10.15.17.0 is directly connected, Loopback17

C 10.15.16.0 is directly connected, Loopback16

C 10.15.19.0 is directly connected, Loopback19

C 10.15.18.0 is directly connected, Loopback18

C 192.168.1.0/24 is directly connected, FastEthernet0/0

R1#

2#sh ip route

Codes: C - connected, S - static, 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

i - IS-IS, su - IS-IS summary, 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

10.0.0.0/24 is subnetted, 22 subnets

C 10.12.6.0 is directly connected, Loopback6

C 10.12.7.0 is directly connected, Loopback7

C 10.12.4.0 is directly connected, Loopback4

C 10.12.5.0 is directly connected, Loopback5

C 10.12.2.0 is directly connected, Loopback2

C 10.12.3.0 is directly connected, Loopback3

C 10.12.1.0 is directly connected, Loopback1

C 10.12.14.0 is directly connected, Loopback14

C 10.12.15.0 is directly connected, Loopback15

C 10.12.12.0 is directly connected, Loopback12

C 10.12.13.0 is directly connected, Loopback13

C 10.12.10.0 is directly connected, Loopback10

C 10.12.11.0 is directly connected, Loopback11

C 10.12.8.0 is directly connected, Loopback8

C 10.12.9.0 is directly connected, Loopback9

C 10.12.22.0 is directly connected, Loopback22

C 10.12.23.0 is directly connected, Loopback23

C 10.12.21.0 is directly connected, Loopback21

C 10.12.18.0 is directly connected, Loopback18

C 10.12.19.0 is directly connected, Loopback19

C 10.12.16.0 is directly connected, Loopback16

C 10.12.17.0 is directly connected, Loopback17

C 192.168.1.0/24 is directly connected, FastEthernet0/0

R2#

PLEASE CHECK WHAT COULD BE THE REASON THAT ROUTES ARE NOT EXCHANGING

THANKS

CCNA

CCNA :)

Vasilii Mikhailovskii · ‎11-12-2013

Hello.

I guess the issue is: you are using RIPv1 and auto-summary is in place.

cadet alain · ‎11-12-2013

Hi,

hardcode RIPv2 and disable auto-summary and you'll see the loopbacks advertised by RIP on each router.

router rip

version 2

no auto-summary

Now for the explanation: each router is sending 10.0.0.0/8 network as the update is crossing a major network boundary and RIPv1 autosummarizes in this case.

When the other RIPv1 router receives this 10.0.0.0/8 it looks if it has already network subnets part of this classful network known on other interfaces which is the case here and so it ignores the update.

Regards

Alain

Don't forget to rate helpful posts.

Zulqadar Ahmad · ‎11-12-2013

Hi Thanks for your reply.....

If i configure rip version 2 summarized address is recieved from both side and both network can ping each other.

But if i configured version 1 summraized address is not recieving i dont know what is the issue .

Whenever if i dont confgure no auto summary at version2 by default its Autosummary is on.(but still recieved summary address from both side)

and rip version 1 have only auto summary on.(but summmary address is not recieved)

CCNA :)

cadet alain · ‎11-12-2013

Hi,

But if i configured version 1 summraized address is not recieving i dont know what is the issue .

I answered in my previous post:

When the other RIPv1 router receives this 10.0.0.0/8 it looks if it has already network subnets part of this classful network known on other interfaces which is the case here and so it ignores the update.

This is how RIPv1 behaves, now in RIPv2 by default it also autosummarizes but it is now a classless protocol(not a classful one) and so it accepts the 10.0.0.0/8 network.

Regards

Alain

Don't forget to rate helpful posts.