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ipv6 is of 128 bit address, we define our address fe088::/32. What does /32, /64 denote in the address 

for example     2001:420::**/64**

?

glglgl
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anish
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1 Answers1

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For stateless address autoconfiguration (SLAAC) to work, subnets require a /64 address block as defined in RFC 4291 section 2.5.1. Local Internet registries get assigned at least /32 blocks, which they divide among ISPs. The obsolete RFC 3177 recommended the assignment of a /48 to end consumer sites. This was replaced by RFC 6177, which "recommends giving home sites significantly more than a single /64, but does not recommend that every home site be given a /48 either." /56s are specifically considered. It remains to be seen if ISPs will honor this recommendation; for example, during initial trials Comcast customers have been given a single /64 network.

Emir Akaydın
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