On 19 Apr 2010, at 22:03 , Xiaoliang Zhao wrote: >> ISP folks are telling me that the presence of IPv4 options >> is *ignored* by the IP backbone routers. Put in other words, > > As far as I know, backbone routers at least response to Router Alert > option because RSVP is uing it.
A number of ISP folks tell me that while backbone routers *can* be configured to respond differently to IPv4 packets containing options (e.g. Router Alert), their backbone routers have been configured to NOT do that, and instead to ignore all IPv4 options. RSVP is not widely deployed for per-flow QoS, and never has been. An obvious question would be whether LDP is more widely deployed than RSVP (e.g. in an MPLS context). I don't have any data on relative use of LDP vs RSVP for MPLS signalling. Yours, Ran _______________________________________________ rrg mailing list [email protected] http://www.irtf.org/mailman/listinfo/rrg
