I'm having trouble understanding IPv6 addresses. In IPv4 the CIDR slash notation means what subnet the address is in. But a /48 in IPv6 does not mean subnet. I have no idea what it means. For instance I've seen the address 2001:0:1:5::1/64, and I hav...

I want to use the isis routing protocol. To initialize this one must do:router isisBut when I enter this command from global config it does not put me into a router prompt, it doesn't do anything and it gives me the global config prompt again. Also i...