PC from one network won't ping another. Can anyone help?

[lila-msfrazao]

My teacher of Computer Networking has asked us to make 10 networks, of varying lenghts, in Cisco Packet Tracer, with some more specifications (it has to have email, web, ftp, other stuff)

I'm almost finished, and I thought it was all good, but I think I've done something wrong with the OSPF, because the PCs of the top row can ping each other without much problems, but they don't seem to be able to reach the bottom row of networks... can anyone please help me?

[Kasun Bandara]

@lila-msfrazao hello,

in router 10.0.4.1 > configure interface gi 0/1/0 ip to 192.168.0.6/30

in router 10.0.6.1 > you configured 10.0.6.1/22. this conflicts with 192.168.4.0 range.

like that , make sure your all subnets not conflicting each other and check the interface IP addresses and OSPF neighbor status again.

[lila-msfrazao]

Hello @Kasun Bandara 
Could you elaborate a little bit more about what I did in router 10.0.6.1, please? I'm pretty new to networking. How does it conflict with the 192.168.4.0 range?

[Kasun Bandara · Accepted solution]

@lila-msfrazao as i saw in the config, 

you are using 192.168.4.0/23 and 192.168.6.0/22 in 2 routers. if you check the IP range for 192.168.6.0/22 is 192.168.4.1 - 192.168.7.254. so your 192.168.4.0/23 is conflict with this range. you can use below link to calculate the subnets.

https://www.subnet-calculator.com/subnet.php?net_class=A