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[v6ops] RFC 4291, link local address defination

Praveen Chaudhary <cpraveen@juniper.net> Wed, 14 August 2013 10:53 UTC

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From: Praveen Chaudhary <cpraveen@juniper.net>
To: "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops]RFC 4291, link local address defination
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Date: Wed, 14 Aug 2013 10:52:05 +0000
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Subject: [v6ops] RFC 4291, link local address defination
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Hi

As per RFC 4291 section 2.5.6 link local address are defines with the prefix fe80::/64, but many definition says even fe80::/10 qualifies as link local address.
Like on wiki:
"In the Internet Protocol Version 6<http://en.wikipedia.org/wiki/IPv6> (IPv6), the address block fe80::/10 has been reserved for link-local unicast addressing.[2]<http://en.wikipedia.org/wiki/Link-local_address> The actual link local addresses are assigned with the prefix fe80::/64.[6]<http://en.wikipedia.org/wiki/Link-local_address>[note 2]<http://en.wikipedia.org/wiki/Link-local_address> They may be assigned by automatic (stateless) or stateful e.g. manual) mechanisms."

So if we have an address as below, which does not match prefix condition, how an implementation should treat them.
fe80:4888:208:ff8b:aa:21:0:2

process as global address surely not ??, but as link local , it does not qualify. Kindly suggest.

Sorry if I am repeating a thread,

Thanks & Regards
Praveen

Juniper Networks

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