> Op 20 feb. 2015, om 15:55 heeft STARK, BARBARA H <[email protected]> het > volgende geschreven: > >> So what I want to see is a proposal for a routing protocol that specify link >> metrics for a set of commonly used link types in homes. This spec could be >> BCP. > > Does it need to be a routing protocol? Just to throw another possible > protocol into the mix being tossed around (like we don't have enough),
I don't think current protocols used by ISPs or enterprises fits our plug&play requirements. Also, there is a lot more wireless in homes. That doesn't mean we cannot build on current protocols. > I'd like to suggest that a non-routing protocol be considered for topology > discovery and sharing of link metrics. Specifically, IEEE 1905.1a could help > with this. It can provide L1 and L2 topology info with link metrics, and > identify intervening bridges that support LLDP for IEEE 802.1 bridge > discovery. I wouldn't want individual devices all doing their own 1905 > topology discovery -- that's too chatty. But if the all the homenet routers > did, and then advertised a "service" (DNS-SD) that provided a link to a > router-provider HTML page with the topology and metric info the router can > discover provided in a standardized XML or JSON syntax, then everything who > can discover that service (on each router) would have access to this info. > Applications could also make use of this info to do intelligent source > address selection in a multi-WAN-interface network, because routers could > report on the speed of their WAN connections, as well. My thoughts are as follows: sub-IP mechanisms provide usable metrics. Somewhere, near to L3 routing, this information is translated to a dimensionless cost metric for each link, where a link is a sub-IP path between two routers. Cost is not symmetric, cost A->B can differ from B->A. It is the routing protocol to distribute this information in the routing domain. Teco > > Just a thought. I've been working on trying to get myself to write a > contribution describing the idea of the router-provided info service for a > while now. > Barbara _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
