Conexão entre roteadores sem estações uma rede por si só?

Question

If 3 routers are connected this way together, is the connection between Router1 and Router2 itself forms a network on its own despite having no stations between them? Similarly, would the connection between Router2 and Router3, and Router3 and Router1 form a network without stations between them?

In other words, the connection between Router1 and Router2 will require another subnet of IP addresses which is only used for the interfaces connected between Router1 and Router2? Otherwise, what would the IP address of the Interface on the routers that connect between themselves if they don't form an "empty network" between them?

Answer 1

Normally, yes, you would configure each PtP link with it's own /30 or /31 (depends on software support) network. It's also pretty common for NetAdmins to waste a whole /24 on links if there aren't very many links to begin with.

Se não for um link Ethernet, pode ser serial, por exemplo, então depende da implementação do software e possivelmente da escolha do administrador. Mas isso não é “normal” em equipamentos novos hoje em dia.

Answer 2

Se você tiver links roteados individuais entre R1 e R2, R2 e R3 e R3 e R1, então sim, cada link exigirá seu próprio conjunto de endereços IP (e sub-rede correspondente). Os roteadores não precisam de “estações” para operar.