Hi Rich, Thank you for the discussion. See inline.
________________________________________ From: [email protected] [[email protected]] on behalf of Richard Alimi [[email protected]] Sent: Wednesday, March 28, 2012 11:57 PM To: Songhaibin Cc: [email protected] Subject: Re: [alto] ALTO discovery in roaming scenario On Mon, Mar 19, 2012 at 4:28 AM, Songhaibin <[email protected]> wrote: > Hi, > > The indicated by the subject, which is perhaps not fully solved in the > discovery draft, I guess at least the following scenarios should be > considered. As I'm not an expert on roaming technology, please correct me if > you find I am wrong. > > (1) The ALTO client has left its home network, and its IP address is > dynamically assigned by the current network provider (through DHCP or any > other method), but the ALTO client still uses its home agent to access the > Internet. In this case, the ALTO server resided in its home network should be > the right ALTO server to be discovered. > > (2) The ALTO client has left its home network, and its IP address is > dynamically assigned by the current network provider, and the ALTO client > uses the foreign agent to access Internet or uses its IP address directly to > access Internet. In this scenario, the ALTO server resided in the current > network should be the right one. And the existing discovery mechanism works > in this scenario. > > (3) If the ALTO client has a persistent IP address when roaming, and it uses > home agent to access Internet, but make large data route to the foreign agent > directly (optimized routing mode). In this scenario, the ALTO server resided > in the current network should be the right one to be discovered. However, if > it does not adopt the optimized routing mode, the ALTO server in the home > network should be the right one. > I'm not familiar with the technologies backing this, but what entity decides the route that a particular packet will take? Is this DPI living in the network where the client is roaming? Or is it some entity on the client itself? [Haibin] No, it is not DPI based. Although I'm not an expert on this either, but I think in the mobile IPv6 scenario, the decision is made through the negotiation among the mobile node, home agent, and other correspondent nodes. BR, -Haibin > (4) (this one is not about roaming) Assume in a big company which has a few > branch offices in different locations, and VPN tunnels are used to connect > these branch offices, employees use one proxy to access Internet. Then the > ALTO server discovery should be based on the proxy's IP address instead of > the user's IP address. It also applies to other similar scenarios when > end-hosts using proxies. > > It might not be a problem when doing third party discovery, but have to > consider when doing the discovery by the end-host itself. > > BR, > -Haibin > _______________________________________________ > alto mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/alto _______________________________________________ alto mailing list [email protected] https://www.ietf.org/mailman/listinfo/alto
