cant ping between hosts

[ferdao71493]

I need help and it is urgent please. I configured it till dhcp but I only cant ping from pc a to other hosts??

file are attached

[paul driver]

Hello

Apologies but it seems like you are asking these forums to complete your school assignments, I have supplied you one lot of completed work and I believe others have also
I don’t think it is wise you seeking this assistance as then you won’t learn the subjects for yourself.

[ferdao71493]

No sir, you are wrong. I am asking these questions while I am studying for my exam. 

Thank you anyway.

[Georg Pauwen]

Hello,

this seems to be a different lab than the one before ? Either way, check if the ACL in part 3 does what it is supposed to do...

Revised file attached...

[ferdao71493]

Thank you sir, actually I found out that I was pinging a wrong address, I could ping in between the hosts.

But another problem I am facing is after configuring the OSPF, in PArt 1.

I can not ping the loopback from hosts. Could you please help?

[Georg Pauwen · Accepted solution]

Hello,

that is because you are not advertising all your local networks in OSPF on the Gateway router. Add the lines marked in bold:

router ospf 10
log-adjacency-changes
network 192.168.10.0 0.0.0.3 area 10
network 209.165.201.224 0.0.0.3 area 10
network 192.168.10.32 0.0.0.31 area 0

network 192.168.10.64 0.0.0.31 area 0

!

[Georg Pauwen]

Attached the revised file...

[Joseph W. Doherty]

As an aside, although there's nothing wrong with what Georg is suggesting, I just wanted to mention, OSPF network statements don't advertise the network prefix in the network statement, its IP and mask are used, like an ACL's, to match interfaces whose IP matches it. For those matched interfaces, the interface's network is advertised.

See:
https://community.cisco.com/t5/routing/ospf-network-statement-match-only-on-the-ip-address-or-will-it/td-p/3995633
https://blog.ipspace.net/2007/07/be-smart-when-using-ospf-network.html

This distinction can be important, because, for example, you can insure only one interface is matched, by using the interface's IP like a host IP in an ACL's ACE, or conversely, you can match every interface IP on the router using just a single OSPF network statement (both shown in 2nd reference). Also like an ACL, you can overlap IP address blocks allowing nested IP address ranges to be assigned to different areas (not shown in above references - example follows).

network x.x.x.x 0.0.0.0 area X !match just one interface IP (/32)
network y.0.0.0 0.255.255.255 area Y !match interface IPs all in the same /8
network 0.0.0.0 255.255.255.255 area Z !match all interface IPs