On Jan 17, 2014, at 9:24 AM, Mikael Abrahamsson wrote: > On Thu, 16 Jan 2014, Templin, Fred L wrote: > >> The key is that we want to probe the path between the BR and CE (in both >> directions) *before* allowing regular data packets to flow. We want to know >> ahead of time whether to allow large packets into the tunnel or whether we >> need to shut the MTU down to 1480 (or 1472 or something) and clamp the MSS. >> Because, once we restrict the tunnel MTU hosts will be stuck with a >> degenerate MTU indefinitely or at least for a long time. > > This method makes some sense, but since network conditions can change, I > would like to see periodic re-checks of the tunnel still working with the > packet sizes, perhaps pinging itself over the tunnel once per minute with the > larger packet size if larger packet size is in use.
Section 8 of RFC 5969 could be relevant here. - Mark > > -- > Mikael Abrahamsson email: [email protected]
