[EMAIL PROTECTED] wrote: > Hi Margaret, > > As pointed out, the draft you have edited (draft-ietf-ipv6-3gpp-recommend-02.txt) > states: > > 7.1 Limitations of 3GPP Address Assignment > > The current 3GPP address assignment mechanism has the following > limitations: > > The GGSN only advertises a single /64 prefix, rather than a > set of prefixes. This will prevent the participation of 3GPP > nodes (e.g. handsets or 3GPP-attached laptops) in IPv6 site > renumbering, or in other mechanisms that expect IPv6 hosts to > create addresses based on multiple advertised prefixes. > > A 3GPP node is assigned a single identifier and is not allowed > to generate additional identifiers. This will prevent the use > of privacy addresses by 3GPP nodes. This also makes 3GPP > mechanisms not fully compliant with the expected behavior of > IPv6 nodes, which will result in incompatibility with popular > laptop IPv6 stacks. For example, a laptop that uses privacy > addresses for web browser connections could not currently not > currently establish a web browser connection over a 3GPP link. > > As our draft is not meant to change either IETF nor 3GPP specifications, > we cannot make any additional claims. > > Is there something that you wish to see in our document to fully cover > this? One possiblility would be to add the following text to the end > of 2.5.1: > > If Privacy Addresses are used [RFC-3041], then DupAddrDetectTransmits > should not be set to zero. > > John
As long as the GGSN does not configure any global scope addresses on its interface towards the 3G host, Privacy Addresses can be used with DupAddrDetectTransmits = 0. IMO there is no need for a global scope address on the interface towards the host, it's a point-to-point link and if the host needs to send packets with the GGSN as destination, it can just use the all-routers multicast address. /Gerben -------------------------------------------------------------------- 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] --------------------------------------------------------------------
