hi pekka, if you want to discover nodes somewhere along the path (between a particular source and a destination address) then you have a limited number of choices. the router alert option is one option and certainly not better or worse than other options. do you have a suggestion how to accomplish the same functionality (as required by rsvp or similar protocols) in a better fashion? ciao hannes > On Tue, 10 Aug 2004, Fleischman, Eric wrote: > > I am aware of some use of RSVP in labs but I am not aware > of any use > > of RSVP in production networks (i.e., real life networks people > > connect to the Internet with). Simultaneously, I am > encountering I-Ds > > and other work planning to use RSVP. This possible > disconnect concerns > > me. Therefore, I would appreciate being educated by anybody > using RSVP > > in production settings. Would you please let me know how > many devices, > > what applications, and how successful these deployments (if > any) are? > > Thank you. > > I'd be interested about this as well, but also in more general. > > I'd be in favor of deprecating the IP router alert option > completely. > Effectively this affects RSVP and MLD *). I'd want to > similarly do away with the IPv6 Hop-by-Hop options. At the > very least, I'd like to prevent further standardization of > these options. > > The justification is simple: any "magic" packets which all > routers on the path must somehow examine and process seems a > very dubious concept when we want to avoid DoS attacks etc. > on the core equipment which must run on hardware: effectively > this means that either these are ignored in any case > (nullifying the use of such options), or put on a "slow path" > (causing a potential for DoS). IMHO, it seems just simply > bad protocol design to require such behaviour. > > I'm interested what others think about this.. :) > > *) MLD should be relatively straight-forward to re-design > (just send the MLD reports to a link-local address which the > router is listening), or just keep it as is for now. RSVP > can probably thrown away without many tears. > > -- > Pekka Savola "You each name yourselves king, yet the > Netcore Oy kingdom bleeds." > Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings > > > _______________________________________________ > Ietf mailing list > Ietf@xxxxxxxx > https://www1.ietf.org/mailman/listinfo/ietf > _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf