> -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > Woundy, Richard > Sent: Thursday, April 23, 2009 9:08 AM > To: Sebastian Kiesel; Reinaldo Penno > Cc: [email protected] > Subject: Re: [alto] ALTO client protocol and Autonomous System Numbers > > > And I'm still looking for a convincing use case, where the benefits > outweigh the possible complications that may arise if an ALTO client > does not know how to handle ASNs or maps them in a wrong way. > > I see two benefits for network operators to use ASNs: (1) ASN can be a > useful abstraction (and level of aggregation) for localization, and (2) > the mapping of ASN-to-IP prefixes changes relatively slowly, perhaps at > a different timescale than changes to ALTO guidance.
To add to Rich's points, an ALTO client may be an intermediary like an application specific tracker that in turn interfaces with many end-hosts. In such a scenario, using AS numbers enhances scalability of the protocol. Across multiple queries from such an entity, a common subset of AS numbers may appear in responses. Clearly there is gain in abbreviating these responses. _______________________________________________ alto mailing list [email protected] https://www.ietf.org/mailman/listinfo/alto
