You can check freshness of a message by means of sequence numbers, no? Bora
On 9/18/07 8:55 AM, "Xin Liu" <[EMAIL PROTECTED]> wrote: > Ideally, yes, a protocol should not rely on clock synchronization at > all. However, to ensure freshness of messages, we don't have many > choices, and clock synchronization seems to be the least painful one. > So we asked about router clocks on the current Internet. If normally > router clocks are synchronized and we have a mechanism to detect and > fix out-of-sync clocks, is it reasonable to assume clock > synchronization in the rest of our design? > > Best > Regards, > > Xin Liu > > On 9/17/07, Bora Akyol <[EMAIL PROTECTED]> wrote: >> IMHO: >> >> What ever solution you end up proposing should able to handle (3) and should >> work with arbitrary boundaries for (1) & (2). >> >> We don't want to add another failure mode to the network that depends on >> time synchronization. >> >> You don't want to shift the problem from BGP to NTP. >> >> Regards >> >> Bora