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> one giant network of 10.2.0.0/8 Huh? Do they mean 10.0.0.0/8, or 10.2.0.0/16 (/15 would also work), or is this a new CIDR notation? Something specific to AWS
by gnfargbl 3y ago
> one giant network of 10.2.0.0/8
Huh? Do they mean 10.0.0.0/8, or 10.2.0.0/16 (/15 would also work), or is this a new CIDR notation? Something specific to AWS, maybe?
- crabbone 3y agoTechnically, it doesn't matter what number you stick after the first stop in a /8 network. Might as well write it as 10.X.X.X/8, it's all the same. I'm not sure where I've seen this done, but >90% certain some of the ip commands output this kind of CIDRs by simply concatenating the IP of the node you are querying and the size of the network.
- deleted 3y ago[deleted]
- gilbetron 3y agoYou encounter that all the time in the networking world - formally the bits outside of the prefix length should be 0, but informally you'll often see set bits. Often it is a way to say "the subnet that includes this ip address". So 192.254.33.12/16 or something. Could just be a typo, too. Regardless, it doesn't really matter what is in the bits outside of the prefix length, because they get zeroed out when used.
- gnfargbl 3y agoYeah, but that makes sense -- it's a shorthand for "the IP address 192.254.33.12 which is in the /16 subnet".