Re: DAD scope ??
Hi Keshava, DAD is intended to cover all unicast addresses (all scopes). It includes an optimization, however, that allows nodes that have checked a link-local address with a particular Interface ID (IID) to skip checking other addresses that are constructed on the same interface using that same IID. DAD is a link-local mechanism (uses link-local multicast packets). So, while it checks all addresses, it only explicitly checks for duplicate addresses on the local link. Margaret At 04:41 PM 1/4/2003 +0800, Keshava Ayanur wrote: I would like to know Duplicate Address detection (DAD) scope is only for link - for link local address Or it appilies even for site - for site local address global - for global unicast address. Thanks keshava IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED]
Re: [6bone] DAD scope ??
On Sun, 5 Jan 2003, Pim van Pelt wrote: On Sat, Jan 04, 2003 at 05:56:58PM +0200, Pekka Savola wrote: | On Sat, 4 Jan 2003, Keshava Ayanur wrote: | Duplicate Address detection (DAD) scope is only for | Or it appilies even for | |site - for site local address |global - for global unicast address. | | All. How would I do DAD for a global scope address ? The same as with link-local addresses. ICMPv6-ND does not seem appropriate and ICMPv6-echo is surely not what you want. There seems to be some confusion here. DAD is used to guarantee uniqueness of an address on a _link_ (or possibly on a subnet) -- the same for any kind of address, not uniqueness within a scope (e.g. DAD for a global address does not mean it's globally unique). Hope this clarifies. -- Pekka Savola Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall Systems. Networks. Security. -- Robert Jordan: A Crown of Swords IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED]
