Hi Tony, > -----邮件原件----- > 发件人: Tony Li [mailto:[email protected]] > 发送时间: 2009年8月5日 12:26 > 收件人: Xu Xiaohu > 抄送: 'RJ Atkinson'; 'IRTF Routing RG' > 主题: Re: [rrg] Some concerns about ILNP > > > Let me see if I can answer: > > > In fact, my question is much simple, that is: when a mobile > node moves > > to a new subnet where another node occasionally uses the same > > identifer as the mobile node, should the mobile node > renumber its identifier? > > > Simply put: this needs to never happen. That creates the > potential for a collision within the same locator. It's up > to the administrator of that local subnet to ensure that > there's some mechanism for resolving this. Note that it does > not mean that the mobile node much change its identifier, > just that it needs to not use that identifier while the other > node could possibly appear. > > One alternate approach would be for it to have a temporary, > local identifier purely for use within that subnet. > > Or, there can be some mechanism that prevents the other node > from connecting.
Do you mean if there is an identifiier collision during mobility, one should be killed even though it is communicating with somebody else? > > if so, can the > > established session using that identifier survives after idenfifier > > renumbering? > > > Certainly. Again, the identifier does not need to be > abandoned. The only restriction is that there are not two > systems with the same locator and same identifier at the same time. > > For example, if a node is going to make use of the temporary > identifier that I hallucinated above, then it could return to > its permanent identifier when it leaves the locator where > there's a conflict. If the timing permits, the session can continue. If a mobile node change the session association from its permenant id to its temperary id, the session is broken. > > if not, how could the last-hop router distinguishes these two hosts > > when forwarding packets destined to one of them? > > > The last-hop router might well distinguish the two based on > the link layer address and knowing which one is active at present. Before distinguishing the two identities, how could the last-hop router determine which node a given link layer address is corresponding to? It seem like a egg-chicken issue. > > Could you please tell me in which I-D and which section the above > > question has been answered. Thus I can find the answer > quickly. Thanks. > > > This is all in the base ILNP spec. Thanks, I will read it carefully. Best regards, Xiaohu _______________________________________________ rrg mailing list [email protected] http://www.irtf.org/mailman/listinfo/rrg
