Best Effort QoS Drop Profile Input
bdfleming at kanren.net
Mon Aug 24 10:36:56 CDT 2009
We are working on fine tuning drop profiles for customer edge routers
(Juniper J-2320 in almost all cases) and I was hoping for some input
from those who are smarter and have done this before.
- Sites each have a single T1 into a service provider L3 VPN
- Queue depth is 500ms
- Sites typically will use 90%+ of their line rate while school is in
session (education network)
- Services offered include: real-time video (in a different queue) and
best effort (serviced by the queue in question)
- Nearly all BE traffic will be TCP (typical web, email, etc traffic)
We were never able to find a good best practice for configuring drop
profiles on edge devices. We've been using the following with OK
results but I was hoping to have some external, more experienced eyes
take a look...
fill-level 50 drop-probability 5;
fill-level 70 drop-probability 20;
fill-level 90 drop-probability 50;
Has anyone ever run across a publicly documented best practice for
drop profile configuration?
Does anyone have suggestions on ways to improve the configuration above?
Any input is much appreciated, thanks in advance!
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