Missconfigured Ip addresses on PPP links

[mgerson]

On page 796 , regarding Missconfigured ip addresses on PPP/HDLC links,

Todd says

" See that? The IP addresses between the routers are wrong but the link looks like it’s working
fine. This is because PPP, like HDLC and Frame Relay, is a layer 2 WAN encapsulation and
doesn’t care about IP addresses at all. So yes, the link is up, but you can’t use IP across this link
since it’s misconfigured."

How come my Router A has 192.168.0.1/24 and Router B 192.168.1.2/24.
So different networks, and I am still able to ping from A to B and from B to A ?

Thank you

[lammle]

you can and you can't.
The answer is that you are correct, you can ping to a different IP address on a directly connected WAN link running PPP. That is a "feature of PPP".
However, this won't work in production and routing will not occur.
This is more of an illusion that it actually working.
but for testing, it is weird to see that work, I agree.
Todd