在 2015年3月25日 星期三，下午11:42，Alper Yegin 写道：
> > The point is: in the draft, whether support “reachability” is the > > distinction between “fixed IP” and “ sustained IP”, but the truth is any > > type of IP address can provide “reachability”. So there is no clear > > dividing line between “fixed IP” and “ sustained IP” in the definition. > > That is why the definition of the IP types is not valid. > > > > "IP address reachability" is about ability to reach the host at a specific > "IP address" even when the host changes its point of attachment. > You seem to interpret it as if it said "IP reachability" (ability to reach > the host using IP protocol), but that's not the case. > No, I guess we have the same understanding regarding what is “ reachability” here and still my question is: if we use “ reachability” as characteristic to distinguish “fixed IP address” and “sustained IP address”, there will be no clear dividing line between them. Dapeng > That term is already defined in the I-D: > > IP address reachability: The ability to maintain the same IP address for an > extended period of time. The IP address stays the same across independent IP > sessions, and even in the absence of any IP session. The IP address may be > published in a long-term registry (e.g., DNS), and it is made available for > serving incoming (e.g., TCP) connections. IP address reachability is > essential for mobile hosts to use specific/published IP addresses. > > > > > > > > 3. Regarding the definition of “nomadic IP address”: > > > > > > > > > > > > “- Nomadic IP Address > > > > > > This type of IP address provides neither IP session continuity nor > > > > > > IP address reachability. The IP address is obtained from the > > > > > > serving IP gateway and it is not maintained across gateway changes. > > > > > > In other words, the IP address may be released and replaced by a > > > > > > new IP address when the IP gateway changes due to the movement of > > > > > > the mobile > > > > > > host.” > > > > > > > > > > > > Seems this IP address is the IP address that we normally used in > > > > > > most cases. If this is the case, why we need a new name for it? > > > > > > > > > > > > > > > > > > > > > If you don't name it, how would you refer to it in this context? > > > > If the justification of naming IP address as “fixed IP” and “ sustained > > > > IP” is not valid, then we may not necessary need a new name for normal > > > > IP address. > > > > > > > > > > I and the WT#1 believe that justification is valid. > > > If you believe otherwise, please elaborate. > > > > > > > > > > > > > > > > Pls see above comment. > > > > Dapeng > > > > > > Alper > > > > > > > > > > > > > > > > > Dapeng > > > > > > > > > > > > > > > Alper > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Dapeng Liu > > > > > > > > > > > > > > > > > > 在 2015年3月25日 星期三，下午2:02，Alper Yegin 写道： > > > > > > > > > > > > > Hello Dapeng and Alex, > > > > > > > > > > > > > > I hope you had a chance to digest our responses to your comments > > > > > > > and questions about the API work. > > > > > > > If you have any remaining issues, please let us know over the > > > > > > > email at your earliest convenience. > > > > > > > It'd be good if you can articulate them in detail. > > > > > > > > > > > > > > > > > > > > > Thanks. > > > > > > > > > > > > > > Alper > > > > > > > > > > > > > > > > > > > > >
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