Can't ping PC's

[olzhik]

Hey guys, Im having issues with pinging PC's with each other, as I understand its because I didn't configure the serial ports on routers, can someone show me how to configure them? Same with pinging DHCP, HTTP servers and loopback 1 (it just says destination host unreachable) Any help will be much appreciated!

My pkt file: https://drive.google.com/file/d/1zq5_zGlBRAE05Ee6oqUvHbpaPvcIe7TF/view?usp=sharing 

[marce1000]

 - Go here : https://learningnetwork.cisco.com/s/topic/0TO6e000000WEorGAG/packet-tracer

  Tx, M.

[M02@rt37]

Hello @olzhik 

Your serial interface are well configured !

You need routing protocol on all Routers ! 

Start with static routes and after that you could choose dynamic protocol such as OSPF or RIPv2.

As example, this router B1R2-CR-1-301209418 doesn't know how to send packet to LANs behind others routers.... Only connected Networks.

[olzhik]

how do i do that?

[M02@rt37]

OK @olzhik 

You should start with static routes:

On each router you have to configure ip route command under configuration terminal:

ip route [destination-network] [subnet-mask] [next-hop-address or exit-interface]

Refer here: https://medium.com/@41519120005/cisco-packet-tracer-static-routing-48c06824c8a4

[olzhik]

what exactly is the destination network, subnet mask and next-hop-address for my example?

[M02@rt37]

Hello @olzhik 

ip route [destination-network] [subnet-mask] [next-hop-address or exit-interface]

[destination-network] = the remote LAN

[subnet-mask] = the mask of the remote LAN

[next-hop-address or exit-interface] = the IP of the facing interface where you want to route the packet

Use a dynamic routing protocol as @Georg Pauwen suggested should be available on a big big topology. That is not the case. Furthermore, to start learning dynamic routing protocol, it is better to master static routes before. Each dynamic routing has got their own specificities and it is harder to start learning them before the traditionnal static route.

@olzhik as example on your topology:

PC A success to ping the DHCP/DNS server thanks to static routes on B1R2 and HQR2 like this:

Do the same "logic" on other Routers and for others LANs

[Georg Pauwen]

Hello,

unless it is a requirement, using static routes can quickly become complicated. Better use a routing protocol. In the revised file I added EIGRP as a routing protocol. Also, on the right router, your LAN interface was shut, so the subinterfaces were not active...