can't ping between routers

[Pilder1]

Hello everyone,

I need some guidance on pinging from router 1 to router 2 and 3 and viceverse. I've been struggling pinging from PC Admin in Office 3 to CEO1 in Office 1, I have looked for all connections and looked for all possible missed commands and subnet masks, I have done everything in my knowledge, even though I can't reach connectivity from one network to another.

Attached please find the topology I've been working with, so you can take a look and correct me from my mistakes.

Thank you all.  

[Tyson Joachims]

It likely has something to do with the routing but I don't have the enable password for any of your routers to verify. We will need you to either re-upload your packet tracer file without passwords or provide those passwords to the forum.

[Pilder1]

Sorry about that.

Password 1: ACDC1973

Secure privilege mode access password 2: beatles1960

and thanks again.

[Tyson Joachims]

Admin PC:

The default gateway is misconfigured. Should be the IP address of Gig0 on R3 (172.16.10.1). You have the Admin PC's default gateway configured as 172.16.10.95. This device will never be able to communicate with any other device outside of 172.16.10.0/27 because it isn't using a valid default gateway address.

R3

Missing static routes to R1's networks of 172.16.10.160/27 (VLAN 10), 172.16.10.192/27 (VLAN 20), & 172.16.10.224/27 (VLAN 30). In order to correct this, use the following command:

ip route 172.16.10.160 255.255.255.224 172.16.10.97
ip route 172.16.10.192 255.255.255.224 172.16.10.97
ip route 172.16.10.224 255.255.255.224 172.16.10.97

R1

Missing static routes to R3's networks of 172.16.10.0/27 & 172.16.10.32/27. Add the following commands:

ip route 172.16.10.0 255.255.255.224 172.16.10.98
ip route 172.16.10.32 255.255.255.224 172.16.10.98

CEO1 PC

Wrong default gateway. The gateway address should be the subinterface G0/0.10 address on R1 (172.16.10.161) but instead is configured for 172.16.10.193.

Dialer 1 PC

Wrong default gateway. The gateway address should be the subinterface G0/0.30 address on R1 (172.16.10.225) but instead is configured for the default gateway on VLAN 20.

Copywriter2 PC

Wrong IP address & wrong default gateway. The switch port connected to this PC is configured for VLAN 30 yet this computer is configured for VLAN 20. Either change the VLAN assignment on the switch or change the IP address & default gateway of this PC to something valid for VLAN 30.

Dialer 2 PC

Wrong default gateway. The gateway should be the subinterface Gi0/0.30 address on R1 (172.16.10.225) but instead is configured as the default gateway for VLAN 20.

That's not everything that is wrong on this network but at least it will give you a good start. Hopefully you can learn from the issues that have already been resolved and use that to fix the rest.

[Pilder1]

Thank you for such a detailed explanation. I was wondering if I need to make any changes in R2 as well?

[Tyson Joachims]

R2 isn't in the path of those networks so it is not necessary to be configured; however, the packet tracer file that you provided shows R2's interfaces as not even configured with an IP address. If you want to use R2, you'll need to configure IP addresses on the interfaces along with adding static routes to all the routers.

Please consider rating any useful comments as helpful and designate a post as the answer if one exists.

[Georg Pauwen]

Hello,

is this a duplicate post ? I think you posted the exact same topic in 'Routing' ? Either way, here is the answer (and the working file) from the other post:

Hello,

there were numerous mistakes in your network configuration:

1. All IP addresses and default gateways of all PCs were wrong. I added DHCP pools on the routers, so the attached devices get the correct addresses.

2. The trunk between the switch and the router had a native Vlan of 100. This kept the trunk from transmitting any traffic. If you want to set the native Vlan to 100, you need a matching subinterface on the router. I set the trunk to the default (native Vlan 1).

3. I corrected the duplicate IP address between R3 and R2.

4. I removed all port security from the access ports

5. I assigned static IP addresses to both servers.

Attached the working file with end to end connectivity (saved in PT version 7.3.1).