Solved

Ping between Routers Issue

Posted on 2014-10-11
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Last Modified: 2014-10-11
based In the topology below:
 I can ping from R4 all the way to R3 S1/1 interface but not to R3 interface S1/2.
I can ping from R5 to R3 interface S1/1 but cannot ping R2 S1/1

I know that I have configured Default Route, however I am not sure if that can be the issue.
I will post the Configuration of R5 and R3 now and if you need more information, please let me know.
Thank you.

ping
 R5#sh run
Building configuration...

Current configuration : 1179 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R5
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
ip tcp synwait-time 5
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial1/0
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/1
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/2
 ip address 3.3.3.5 255.255.255.0
 serial restart-delay 0
!
interface Serial1/3
 no ip address
 shutdown
 serial restart-delay 0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 3.3.3.3
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
end

R5#
========================================

R3#sh run
Building configuration...

Current configuration : 1217 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
ip tcp synwait-time 5
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial1/0
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/1
 ip address 1.1.1.3 255.0.0.0
 serial restart-delay 0
!
interface Serial1/2
 ip address 3.3.3.3 255.255.255.0
 serial restart-delay 0
!
interface Serial1/3
 no ip address
 shutdown
 serial restart-delay 0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 1.1.1.2
ip route 0.0.0.0 0.0.0.0 3.3.3.5
!
no ip http server
no ip http secure-server
!
control-plane
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
end

R3#
============================

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Question by:jskfan
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4 Comments
 
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Expert Comment

by:Don Johnston
Comment Utility
You can't have two default routes going to different networks.  

Remove the default route on R3 pointing to R5.

Also, post the routing tables of all the routers.
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Author Comment

by:jskfan
Comment Utility
Routing Tables

R5#sh ip route
 Gateway of last resort is 3.3.3.3 to network 0.0.0.0

     3.0.0.0/24 is subnetted, 1 subnets
C       3.3.3.0 is directly connected, Serial1/2
S*   0.0.0.0/0 [1/0] via 3.3.3.3
R5#

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R4#sh ip route
 
Gateway of last resort is 2.2.2.2 to network 0.0.0.0

C    2.0.0.0/8 is directly connected, Serial1/2
S*   0.0.0.0/0 [1/0] via 2.2.2.2
R4#

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R3#sh ip route
       
Gateway of last resort is 3.3.3.5 to network 0.0.0.0

C    1.0.0.0/8 is directly connected, Serial1/1
     3.0.0.0/24 is subnetted, 1 subnets
C       3.3.3.0 is directly connected, Serial1/2
S*   0.0.0.0/0 [1/0] via 3.3.3.5
               [1/0] via 1.1.1.2
R3#

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R2#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 2.2.2.4 to network 0.0.0.0

C    1.0.0.0/8 is directly connected, Serial1/1
C    2.0.0.0/8 is directly connected, Serial1/2
S*   0.0.0.0/0 [1/0] via 2.2.2.4
               [1/0] via 1.1.1.3
R2#

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Accepted Solution

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Don Johnston earned 500 total points
Comment Utility
Your first problem is that you have multiple default routes on a couple of the routers.

Delete the additional default routes and create some static routes to specific networks.
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Author Closing Comment

by:jskfan
Comment Utility
Thanks DON

I have deleted Default Route and replaced it by static route on all routers. Now I can ping from End to End and back...
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