[j-nsp] IPv6 subnetting

[snort bsd]

Hi all:

From RFC4291, the IPv6 addressing scheme is more like nowadays IPv4 VLSM. But IPv6 doesn't have "broadcasting addresses". Then how does that affect IPv6 addressing?

Say, fec0:10:10:10::/64, intuitively we know that we can't use the first address, does that mean we can use rest of addresses? what about fec0:10:10:10::14/126? I tested on a router (M5) and it would not take it. Here what i got after I tried to commit:

  'address 2:10::14/126'
     Cannot assign address 0 on subnet
error: configuration check-out failed


Then later tried fec0:10:10:10::14/125 and the interface took it.

Thanks all

Dave




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