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Cannot ping between routers

ITgrad
Level 1
Level 1

I'm a third year comp-sci student, and having trouble with some basic setup of my network in packet tracer. My main issue is that I cannot send packets between ACMER1 to ACMER2, and ACMER1 to ACMER3. I am pretty sure I'm supposed to implement some variation of a static route, but for the life of me cannot figure out why I can't get it to work. I am sure this a simple fix and that I'll kick myself if I figure it out. 

My network topology: setup.PNG

Here are my "show running-config"'s below:

ACMER1:

Current configuration : 1451 bytes

!

version 12.4

no service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname Router

!

login block-for 300 attempts 2 within 120

!

!

enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0

!

!

!

!

!

!

no ip cef

 

Router#

Router#

Router#show running-config

Building configuration...

 

Current configuration : 1451 bytes

!

version 12.4

no service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname Router

!

login block-for 300 attempts 2 within 120

!

!

enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0

!

!

!

!

!

!

no ip cef

no ipv6 cef

!

!

!

username ACMER1 password 7 0822455D0A16

!

!

!

!

!

!

!

!

no ip domain-lookup

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface FastEthernet0/0

no ip address

duplex auto

speed auto

!

interface FastEthernet0/1

ip address 10.1.18.126 255.255.255.128

duplex auto

speed auto

!

interface Serial0/0/0

ip address 172.16.1.153 255.255.255.252

clock rate 2000000

!

interface Serial0/0/1

ip address 172.16.0.73 255.255.255.252

encapsulation ppp

ppp authentication chap

clock rate 2000000

!

interface Vlan1

no ip address

shutdown

!

router ospf 1

router-id 1.1.1.1

log-adjacency-changes

network 10.1.18.0 0.0.0.127 area 1

network 172.16.1.152 0.0.0.3 area 0

network 172.16.0.72 0.0.0.3 area 0

!

ip classless

ip route 0.0.0.0 0.0.0.0 0.0.0.0

!

ip flow-export version 9

!

!

ip access-list extended sl_def_acl

deny tcp any any eq telnet

deny tcp any any eq www

deny tcp any any eq 22

permit tcp any any eq 22

!

no cdp run

!

banner motd ^C

This router is managed by 1404956 ^C

!

!

!

!

line con 0

password 7 0822455D0A16

login

!

line aux 0

!

line vty 0 4

access-class TELNET in

password 7 0822455D0A16

login

line vty 5 15

password 7 0822455D0A16

login

!

!

!

end-------------------------------------------------

Current configuration : 1451 bytes

!

version 15.1

service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname Router

!

logging userinfo

!

!

enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0

!

!

!

!

!

!

no ip cef

no ipv6 cef

!

!

!

username ACMER2 password 7 0822455D0A16

!

!

license udi pid CISCO2911/K9 sn FTX15240EF0

license boot module c2900 technology-package securityk9

!

!

!

!

!

!

!

!

!

no ip domain-lookup

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 202.202.18.155 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

no ip address

duplex auto

speed auto

shutdown

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/0/0

ip address 172.16.0.74 255.255.255.252

encapsulation ppp

ppp authentication chap

clock rate 2000000

!

interface Serial0/0/1

ip address 172.16.2.73 255.255.255.252

clock rate 2000000

!

interface Serial0/1/0

no ip address

clock rate 2000000

shutdown

!

interface Serial0/1/1

no ip address

clock rate 2000000

shutdown

!

interface Vlan1

no ip address

shutdown

!

ip classless

ip route 0.0.0.0 0.0.0.0 0.0.0.0

!

ip flow-export version 9

!

!

!

no cdp run

!

banner motd ^C

This router is managed by 1404956 ^C

!

!

!

!

no logging trap

line con 0

password 7 0822455D0A16

login

!

line aux 0

!

line vty 0 4

password 7 0822455D0A16

login

line vty 5 15

password 7 0822455D0A16

login

!

!

!

end-------------------------------------------------

ACMER3

Current configuration : 900 bytes

!

version 12.4

no service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname Router

!

!

!

enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0

!

!

!

!

!

!

no ip cef

no ipv6 cef

!

!

!

!

!

!

!

!

!

!

no ip domain-lookup

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface FastEthernet0/0

ip address 10.2.21.126 255.255.255.128

duplex auto

speed auto

!

interface FastEthernet0/1

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/0/0

ip address 172.16.1.154 255.255.255.252

clock rate 2000000

!

interface Serial0/0/1

ip address 172.16.2.74 255.255.255.252

!

interface Vlan1

no ip address

shutdown

!

ip classless

!

ip flow-export version 9

!

!

!

no cdp run

!

!

!

!

!

line con 0

password 7 0822455D0A16

login

!

line aux 0

!

line vty 0 4

password 7 0822455D0A16

login

line vty 5 15

password 7 0822455D0A16

login

!

!

!

end-------------------------------------------------

 

Any help/guidence is greatly appreciated

42 Replies 42

So upon further inspection of my network, even without CHAP authentication, the routers won't recodnise one another as ospf neighbors, aside ACMER2 & 3 seeing one another

Hi @ITgrad

 

Please, share the output of "show ip ospf interface serial x/x" from both router plase.

 

 

 

-If I helped you somehow, please, rate it as useful.-cupons extracupons extracupons extra

It would also help if you post the output of show ip interface brief from each of the routers.

 

HTH

 

Rick

HTH

Rick

ACMER1
Router#show ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES manual up down
FastEthernet0/1 10.1.18.126 YES manual up up
Serial0/0/0 172.16.1.153 YES manual up up
Serial0/0/1 172.16.0.73 YES manual up up
Vlan1 unassigned YES unset administratively down down

ACMER2
Router#show ip int brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 202.202.18.155 YES manual up up
GigabitEthernet0/1 unassigned YES unset administratively down down
GigabitEthernet0/2 unassigned YES unset administratively down down
Serial0/0/0 172.16.0.74 YES manual up up
Serial0/0/1 172.16.2.73 YES manual up up
Serial0/1/0 unassigned YES unset administratively down down
Serial0/1/1 unassigned YES unset administratively down down
Vlan1 unassigned YES unset administratively down down

ACMER3
Router#show ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.2.21.126 YES manual up down
FastEthernet0/1 unassigned YES unset administratively down down
Serial0/0/0 172.16.1.154 YES manual up up
Serial0/0/1 172.16.2.74 YES manual up up
Vlan1 unassigned YES unset administratively down down

I've started from scratch; same IP addresses, same static routes, and same subnets. OSPF has been implemented, but ppp & CHAP has been left out this time. I still have the same issue, that ACMER 2&3 see one another as neighbors, but the others do not. I've run the "show ip ospf neighbor" command, and this confirms my problem. I can ping between all three routers, but when I try and ping from the work station connected to ACMER1, to ACMER2, it fails.

I asked for "show ip ospf interface serial x/x

Can you provide?

 

 

-If I helped you somehow, please, rate it as useful.-

do you want the results for each serial interface on all three routers?
apologies for late reponse also

Dont worry.

 From router you are trying to peer up with OSPF. Those two serial interfaces connected each other.

 

 

-If I helped you somehow, please, rate it as useful.-

apologies, but that last post needs to be re-phrased, I can't understand it........again, apologies

Alright.

On router ACMER2 you run:

show ip ospf interface  Serial0/0/1

On router ACMER3 you run:

 

show ip ospf interface  Serial0/0/1

It might provide helpful information to run debug ip ospf adjacency

 

HTH

 

Rick

HTH

Rick

I've managed to get everything working, turns out I made a rookie error; slight incorrections in my IP addressing. You're guidence and suggestions helped me to this discovery, so I thank you all!

You are welcome. I am glad that our suggestions were helpful. Thank you for posting back to the forum to let us know that you have resolved the problem and that it was issues in the configuration of IP addressing on the interfaces.

 

HTH

 

Rick

HTH

Rick