Problem

[Akarfars]

Hello,

I have the following table.

This table was constructed based on IP 172.16.1.0/24, in cisco packet tracer I have 5 point-to-point routing connections,s and there are 7 switches.

I have a problem with assigning the default getaway and serial interfaces, could you please tell me where I have done wrong?

[Georg Pauwen · Accepted solution]

Hello,

post the zipped Packet Tracer project (.pkt) file...

[Georg Pauwen · Accepted solution]

Hello,

I have configured the serial links (and the rest of the network as well, including OSPF on all routers to verify end to end connecivity).

Attached the revised file (saved in PT version 8).

[Georg Pauwen]

Hello,

you need to use an access list and apply it on Router E:

ROUTER E

access-list 101 permit tcp host 172.16.1.131 host 172.16.1.150 eq www
access-list 101 deny tcp any any eq www
access-list 101 permit icmp host 172.16.1.131 host 172.16.1.150
access-list 101 permit icmp host 172.16.1.131 host 172.16.1.150 echo
access-list 101 permit icmp host 172.16.1.131 host 172.16.1.150 echo-reply
access-list 101 deny icmp any any
access-list 101 deny icmp any any echo
access-list 101 deny icmp any any echo-reply
access-list 101 permit ip any any

interface GigabitEthernet0/0
ip address 172.16.1.146 255.255.255.248
ip access-group 101 out
duplex auto
speed auto

--> I want to know how can I know which router is the main router and my main router should not let the other two router that has 6 hosts, get ping. 

Hard to say which is your main router...what indications are in your instructions for knowing which one is the 'main' router ?

[Akarfars]

I have an eigrp and I want to have a main router. So in OSPF, we have BDR and DR, and in EIGRP, I don’t know how to know which one is the main router. 

[Akarfars]

And what about PC3 that is accessing everything else except http and can download file too

[Georg Pauwen]

Hello,

EIGRP has no hierarchy such as OSPF. EIGRP basically only knows routes and next-hops. Depending on how you want to implement EIGRP, you can achieve 'hierarchy' by summarization and filtering.

My guess is that in your topology, Router E is probably supposed to be the 'main' router, since it is connected to the server.