On 9/12/10 8:03 AM, Brian J. Murrell wrote: > On Sun, 2010-09-12 at 06:58 -0700, Tom Eastep wrote: >> What is the MTU of this link? > > 1500
Then I have no idea why you are seeing these inaccuracies. > Yeah, I guess I mis-characterized what (I think) Simple TC is doing. > It's not so much shaping bandwidth as much as simply prioritizing it. > Do you think that is an accurate statement? Essentially not delivering > low priority traffic while there is high priority traffic to be > delivered, yes? > Yes. > >> I have not found a satisfactory >> means for enforcing a single upstream rate without negating the effects >> of priority queuing. > > Yeah, I guess I am not looking to enforce an upstream bandwidth but > simply perform priority dequeueing upstream also. That is, get the VIOP > packets out there before any "bulk" type traffic, even at the complete > expense of bulk traffic, should VOIP actually want all of the upstream > bandwidth. Which is what simple TC does. And it optionally polices ingress, if an IN-BANDWIDTH is given. > > But now that I say that, and put it in the context of the Simple TC and > downstream prioritization, am I really, simply looking for a > tcinterfaces entry of: > > br-lan Internal 1mbit > > where "br-lan" is the LAN side of Shorewall gateway? Hrm, no. That > would prioritize traffic going out to the lan, not coming in from it. Once again -- the *only* thing you can do with incoming traffic is to police it. It is handled in the order in which it arrives and you can't change that. If it is destined for a local application, it gets queued on the socket bound to the destination address. If it gets forwarded, then it is prioritized as it is sent, assuming that simple TC is configured on the output interface. An IFB is a hack which sends all input traffic through a dummy egress device so that traffic shaping can be applied. It makes no sense to apply priority bands in an IFB, as far as I can see. -Tom -- Tom Eastep \ When I die, I want to go like my Grandfather who Shoreline, \ died peacefully in his sleep. Not screaming like Washington, USA \ all of the passengers in his car http://shorewall.net \________________________________________________
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