The MPLS WG Archive

[David Charlap <David.Charlap@marconi.com>]

Hong Liao wrote:
> 
> I know it is SENDER_TSPEC, but is it Peak data rate or the token
> bucket size?

It definitely won't be the token bucket size - that's used for
configuing queue sizes.

The IntServ RFCS explain the IntServ objects.  Three values together
define your QoS:

r - the data rate - this is the "bandwidth" if you only need one number

b - the bucket size - this is (roughly) the size of the queue for
buffering non-conformant packets.

p - the peak data rate - this is the maximum rate data may arrive.

The three together form the parameters for a "leaky bucket" type
queueing system.  I think it's similar to, but not identical to, ATM's
"double leaky bucket" algorithm, if that means anything to you.

-- David