GNS3
http://forum.gns3.net/

Unable to ping far IP on router
http://forum.gns3.net/topic8246.html
Page 1 of 1

Author:  gmccarthy [ Tue Jan 21, 2014 3:55 pm ]
Post subject:  Unable to ping far IP on router

I have a simple setup as per the attached diagram.

This is most likely a beginner problem more than anything else, but from PC1 I can ping the near router and the serial interface of the router, but not the far serial interface IP or anything further. Likewise from PC2.

I suspect a routing propblem but am not sure where to look.

From Router1 I can ping Router2 (1.1.1.2)
From Router2 I can ping Router1 (1.1.1.1)


Router 1:
Quote:
10.10.11.1 0 FULL/ - 00:00:34 1.1.1.2 Serial0/0


Router 2
Quote:
10.10.10.1 0 FULL/ - 00:00:30 1.1.1.1 Serial0/0


vpcs config:

Quote:
NAME IP/MASK GATEWAY MAC DNS
VPCS1 10.10.10.2/24 10.10.10.1 00:50:79:66:68:00
VPCS2 10.10.11.2/24 10.10.11.1 00:50:79:66:68:01


Router 1 config:

Quote:
!
!

!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$yoX1$1nxKU0M06muawS8Oz8Ggi.
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
no ip domain lookup
ip domain name example.com
!
multilink bundle-name authenticated
archive
log config
hidekeys
ip tcp synwait-time 5
interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
ip address 1.1.1.1 255.255.255.0
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
clock rate 2000000
!
router ospf 1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
!
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


Router 2 config:
Quote:
!
!

!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router2
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$tFQQ$5j0/N8aai19QS0VvebevQ0
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
no ip domain lookup
ip domain name example.com
!
multilink bundle-name authenticated
archive
log config
hidekeys
ip tcp synwait-time 5
interface FastEthernet0/0
ip address 10.10.11.1 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
ip address 1.1.1.2 255.255.255.0
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
clock rate 2000000
!
router ospf 1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
!
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


Attachments:
topology.png
topology.png [ 23.33 KiB | Viewed 2494 times ]

Author:  claydon_dan [ Tue Jan 21, 2014 4:29 pm ]
Post subject:  Re: Unable to ping far IP on router

You are correct that it is a routing problem (I shall try and avoid giving you the entire answer here)

Using the configuration you posted, if we take a look at the routing table on Router1 we see the following:
Code:
Router1#show 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

     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Serial0/0
     10.0.0.0/24 is subnetted, 1 subnets
C       10.10.10.0 is directly connected, FastEthernet0/0

The problem should become fairly obvious now... take a look at the networks that the router is aware of. Can it reach your destination?

Try the same on Router2 and see what you find

Author:  gmccarthy [ Tue Jan 21, 2014 7:40 pm ]
Post subject:  Re: Unable to ping far IP on router

Thanks Dan - that did the trick.

Of course...the def gateway on the router!

Everything is pingable now.

Page 1 of 1 All times are UTC
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/