Bora> I thought routers were not supposed to touch TCP headers. A bit in
Bora> IP header may be used (IPv6 provides for this, BTW).
Understood. But IP is connectionless. A datagram makes it to a router,
it is corrupted and dropped (perhaps the FEC fails) or the buffer is
full and it drops.... so what? How does that information get communicated
back to the sender?
Bora> If there is extra information available maybe it
Bora> should be used.
Precisely my question, better stated (thanks). How does one intend to
use a bit in a connectionless oriented datagram to communicate meaningful
congestion vs. link noise (for example) back to the sender of the datagram?
I find this both interesting yet orthogonal to IP. Could someone please
describe this 'concept' in protocol level details. What is causal to what,
feeding back what information to whom?
BTW: I'm not convinced (but open to suggestions) that there is very much
value added in this congestion vs. noise differentation. The 'costs' to
implement such a processing-feedback system appears (on the surface) to
be much greater than any perceived potential gains.
Any substantial analysis on this?
Thanks!
Tim
PS: Sorry to be such a skeptic :)
This archive was generated by hypermail 2b29 : Mon Feb 14 2000 - 16:14:30 EST