Hello team, just for my clarification …
I visualized that after the ppp link is formed, it is exchanging “keepalive” with echo / request frames, reading this frame I see that the only useful identification would be MagicNumber. would this be the parameter he checks for both Loop / error identification, but also to validate if the peer is this UP?
if he does not receive the neighbor and is seen as down or if it is not even equal to the magic number negotiated in the initial session?