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Beginner

Packet Tracer - cannot ping hosts through OSPF

Hello everyone, I'm pretty new to this so please bear with me. I was tasked with making a simple network - three routers, all connected with eachother, with subnets derived from 79.96.21.160/28, and hosts connected to them with subnets derived from 172.19.0.0/16, with a minimum of a 1000 usable addresses. I split them as follows:

 

79.96.21.160 / 255.255.255.252

79.96.21.164 / 255.255.255.252

79.96.21.168 / 255.255.255.252

and

172.19.0.0 / 255.255.192.0

172.19.64.0 / 255.255.192.0

172.19.128.0 / 255.255.192.0

 

The addresses I gave all the devices are in the attached image.

cisco.jpg

I was then supposed to set up OSPF on the routers, which I did using the following commands:


POZNAN(config)#router ospf 1
POZNAN(config-router)#network 172.19.0.0 0.0.63.255 area 0
POZNAN(config-router)#network 79.96.21.160 0.0.0.3 area 0
POZNAN(config-router)#network 79.96.21.168 0.0.0.3 area 0
POZNAN(config-router)#exit

 

LODZ(config)#router ospf 1
LODZ(config-router)#network 172.19.64.0 0.0.63.255 area 0
LODZ(config-router)#network 79.96.21.164 0.0.0.3 area 0
LODZ(config-router)#network 79.96.21.160 0.0.0.3 area 0
LODZ(config-router)#exit

 

WAWA(config)#router ospf 1
WAWA(config-router)#network 172.19.128.0 0.0.63.255 area 0
WAWA(config-router)#network 79.96.21.168 0.0.0.3 area 0
WAWA(config-router)#network 79.96.21.164 0.0.0.3 area 0
WAWA(config-router)#exit

 

I then have to test the ping between POZ0 and WAW1, unfortunately, I get request timed out. I've tried to make this network from scratch a couple of times now, and I cannot figure out what's wrong. I'm also attaching my last attempt in Packet Tracer. Any help would be greatly appreciated!

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Collaborator

Re: Packet Tracer - cannot ping hosts through OSPF

 

ok, this one was not tricky but just  hard to spot mistake especailly after long day .. . .. Hence, i attached my solution here

Try solve it on your own first; within 15-20 minutes

 

Regards, ML
**Please Rate All Helpful Responses **

View solution in original post

3 REPLIES 3
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Collaborator

Re: Packet Tracer - cannot ping hosts through OSPF

 

1. Since PCs are supposed to ping remote PCs, they must have configured .... ? something ?

if you on the same network, you do not need that something. 

that is 1st thing i noticed....so far... but I think there are other issues. will check later

Hint: look at Poznan PC can reach Laptop no problems

2. and routers do not have routes to others, except Warszawa to Poznan.  perhaps a typo somewhere but i do not see it.... yet  :) 

you need to troubleshot routing, ospf neighboring, 

 

 

 

Regards, ML
**Please Rate All Helpful Responses **

Highlighted
Collaborator

Re: Packet Tracer - cannot ping hosts through OSPF

 

ok, this one was not tricky but just  hard to spot mistake especailly after long day .. . .. Hence, i attached my solution here

Try solve it on your own first; within 15-20 minutes

 

Regards, ML
**Please Rate All Helpful Responses **

View solution in original post

Highlighted
Beginner

Re: Packet Tracer - cannot ping hosts through OSPF

The default gateway, of course! Thank you so much for your help, I don't know how long it would've taken me to find that :)

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