Trouble with routing

[LeeHo]

Trying to ping both Vlans at company1 router to both Lans at company2 router but for some reason when the packet was sent out to the ISP router it went to company3 router instead of company1 router also ISP to laptop, ICMP packet travels to company4 router then failed

Here the zipfile for my packet tracer

[Kasun Bandara]

1. VLAN200 devices configured with wrong default gateway

2. in ISP router interface se 0/1/0 configured with IP 10.21.4.2 255.255.248.0 which is belong to network 10.21.0.0. that is same subnet you configured for vlan 100. you must use different network for se 0/1/0 ISP router interface.

3. recommended subnet mask for serial interface is /30

[LeeHo]

Ah I see how about the wireless router?

[Kasun Bandara]

laptop 7 default gateway is wrong

[Georg Pauwen · Accepted solution]

Hello,

what instructions are you following ? There are many mistakes in your configs (overlapping IP address spaces, missing/wrong default routes, wrong default gateways on clients, the wireless router has no Internet IP address, etc.). I took out as many as possible (see attached file). Post the instructions you are following...