I learned to use cisco packet tracer and found something confusing but actually this is not about the cisco packet tracer . I'm curious if this apply in real network as well.
So i tried building this simple lan setup :
PC 192.168.1.10 ---> switch ----> router A (192.168.1.1 / 10.0.0.5) ------> router B (10.0.0.4)
The router A has LAN IP 192.168.1.1 and WAN IP 10.0.0.5
In my setup :
PC IP is 192.168.1.10/24 and set gateway to 192.168.1.1
i can ping from PC to 192.168.1.1 (LAN IP of router A)
i can ping from PC to 10.0.0.5 (WAN IP or router A)
The problem is : if i disconnect router B from router A , i no longer can ping to 10.0.0.5 . Why is it ? why it depends on the connection of router B while that IP (10.0.0.5) has nothing to do with router B
If i reconnect again router A and B, then i now can ping from PC to 10.0.05
How does it actually works ?