nanog mailing list archives
Re: looking for SLA examples
From: Alex Bligh <alex () alex org uk>
Date: Sun, 23 Sep 2001 23:55:03 +0100
--On Sunday, 23 September, 2001 3:15 PM -0500 Tim Peiffer <peiffer () nts umn edu> wrote:
some amount for router serialization and queuing delays (~5 msec/hop?)
5ms per hop? Assuming >=OC-12 backbone, that's way excessive. At OC-12, a 1500 byte packet takes 20 microseconds to serialize. OK you will statistically encounter a few queuing delays even on a near-idle backbone (think about number of other ingress interfaces), but again these should be a few packets when the circuit is not loaded. So 0.5ms per hop seems generous. Remember that with cloak-of-indeterminacy technologies such as ATM and MPLS, you may not be able to see many of the hops. -- Alex Bligh Personal Capacity
Current thread:
- looking for SLA examples Tim Peiffer (Sep 23)
- Re: looking for SLA examples Alex Bligh (Sep 23)