Dear Cullen, You have the same concern with Bruce and Henning. The authors do not think this method is broadly suitable for the diagnostics in the open Internet environment either. However, it may be used in some administrative p2p overlays. The usage of Echo method is limited to certain application scenarios.
As we said in the draft: "An Echo request message is used to retrieve the diagnostic information of the specified path in administrative p2p overlays where all the peers in the overlay are trusted or based on specific authorization. For example, it can be used in a p2p overlay where all peers deployed by the operator to provide services to the customers (clients), where the diagnostics happens between peers in the p2p overlay. For the untrusted p2p overlays, e.g. some end user equipments can be the peers in the overlay network, then the Echo method must be used with care for the consideration of potential DoS attack. Compared with Path_Track method, Echo method brings less messages to the p2p overlay network." Best Regards, Haibin Skype: alexsonghw >-----Original Message----- >From: [email protected] [mailto:[email protected]] On Behalf Of >Cullen Jennings >Sent: Tuesday, March 03, 2009 5:23 AM >To: P2PSIP WG >Subject: [P2PSIP] Comment on p2psip-diagnostics > > >One comment on the Echo design.... I'm worried about a method where >sending a single request can cause a whole bunch of responses. This >has congestion and DOS issues. It is also not clear how all the >retransmissions timers would work with it. > >We should think about if it is possible to move away from the one >request, multiple responses design. > >Cullen <as an individual contributor> > > > > >_______________________________________________ >P2PSIP mailing list >[email protected] >https://www.ietf.org/mailman/listinfo/p2psip _______________________________________________ P2PSIP mailing list [email protected] https://www.ietf.org/mailman/listinfo/p2psip
