Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread sil
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Simon wrote:

| Is this worth doing? If so, what ports should i specifiy?


http://www.bricklin.com/qos.htm


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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Brian J. Murrell
On Thu, 2008-04-17 at 07:16 -0400, sil wrote:
 Simon wrote:
 
 | Is this worth doing? If so, what ports should i specifiy?
 
 
 http://www.bricklin.com/qos.htm

Yeah, well, that's all fine and dandy as long as more capacity is an
option.  Many people are already subscribed to the most capacity
available to them and using it.

b.



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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread sil
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Brian J. Murrell wrote:

|
| Yeah, well, that's all fine and dandy as long as more capacity is an
| option.  Many people are already subscribed to the most capacity
| available to them and using it.
|
| b.

Apparently man people don't understand that those QoS settings on
routers mean little most of the time. Most providers resell QoS as a
premium service, so while many waste their time painting their packets
those markings get stripped.

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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Brian J. Murrell
On Thu, 2008-04-17 at 07:54 -0400, sil wrote:
 
 Apparently man people don't understand that those QoS settings on
 routers mean little most of the time. Most providers resell QoS as a
 premium service, so while many waste their time painting their packets
 those markings get stripped.

Maybe your understanding of QOS and mine is different.  Of course I have
no illusions that I can assign a priority to my packets that is going to
be meaningful to anyone once they leave my network.

But certainly at my choke point which is of course my Internet uplink, I
can apply QOS (i.e. traffic shaping, which is what the OP's router was
offering) to make sure that what little capacity is there is giving
priority to my voice traffic.

Think of my ISP uplink as that moderately congested road in which
emergency vehicles need to have other casual traffic pull over and let
it through.  Traffic shaping is the effect of those vehicles pulling
over and letting the voice traffic through in priority.  This is exactly
what OP's router was allowing him to do, albeit in what sounds like a
really crappy way -- only 3 ports or something like that.

b.



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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread J. Oquendo
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Brian J. Murrell wrote:

| Maybe your understanding of QOS and mine is different.  Of course I have
| no illusions that I can assign a priority to my packets that is going to
| be meaningful to anyone once they leave my network.
|
| But certainly at my choke point which is of course my Internet uplink, I
| can apply QOS (i.e. traffic shaping, which is what the OP's router was
| offering) to make sure that what little capacity is there is giving
| priority to my voice traffic.
|
| Think of my ISP uplink as that moderately congested road in which
| emergency vehicles need to have other casual traffic pull over and let
| it through.  Traffic shaping is the effect of those vehicles pulling
| over and letting the voice traffic through in priority.  This is exactly
| what OP's router was allowing him to do, albeit in what sounds like a
| really crappy way -- only 3 ports or something like that.
|
| b.

Let's take a bare bones look at this. Let's say your connection is 300k
and you have five packets coming in at 60k each to saturate your network:

Provider to you

Packet 1  You
Packet 2  You
Packet 3  You
Packet 4  You
Packet 5  You

You believe that this is happening:

Packet 1  You --- This is voice send it first -- Device
Packet 2  You --- This is voice send it first -- Device
Packet 3  You --- This is P2P leave it 4 last -- Device
Packet 4  You --- This is P2P leave it 4 last -- Device
Packet 5  You --- This is AIM make it second! -- Device

Its fine and dandy, but the problem is you're still getting 5 packets.
You're still saturated period. No QoS in the world outside of your
provider and more bandwidth can alleviate that. Your provider is not
going to care what you do once its passed to the CPE. So look at it
logically again. QoS on a home router... Useless COMING IN. Going out...
Means little but helps MINIMALLY.






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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Brian J. Murrell
On Thu, 2008-04-17 at 08:36 -0400, J. Oquendo wrote:
 
 Brian J. Murrell wrote:
 
 | But certainly at my choke point which is of course my Internet uplink,
  ^^^
  I
 | can apply QOS (i.e. traffic shaping, which is what the OP's router was
 | offering) to make sure that what little capacity is there is giving
 | priority to my voice traffic.


 Let's take a bare bones look at this. Let's say your connection is 300k

Downstream or upstream?  Notice I said Internet uplink in my previous
message.  Anyone at all familiar with traffic shaping understands that
they can only shape the uplink, not the downlink.

The best you can do with the downlink is to police it to try to keep
the congestion below 100%.  But that's mostly alright given how the ISPs
have perverted the Internet with asymmetric last mile connections to
consumers.

 and you have five packets coming in at 60k each to saturate your network:

First of all,your whole example is pointless as you are clearly talking
about downstream and I have already said that anyone knowledgeable with
traffic shaping knows you cannot shape the downlink only the uplink.
However, let's see where else your example fails.

My MTU is only about 1500 bytes or so, so 60k packets to me are
impossible.  I'd tend to guess that for most of the Internet, packets
max out at about 1500 given the prevalence of ethernet connected
devices.  So in order to saturate my 300k you'd have to send me 200
packets all in that one second.

 Provider to you
 
 Packet 1  You
 Packet 2  You
 Packet 3  You
 Packet 4  You
 Packet 5  You
 
 You believe that this is happening:
 
 Packet 1  You --- This is voice send it first -- Device
 Packet 2  You --- This is voice send it first -- Device
 Packet 3  You --- This is P2P leave it 4 last -- Device
 Packet 4  You --- This is P2P leave it 4 last -- Device
 Packet 5  You --- This is AIM make it second! -- Device

As I've said, you cannot shape this traffic.  I've already conceded
that.  But again, OP was talking about uplink shaping, not downlink.

 Its fine and dandy, but the problem is you're still getting 5 packets.
 You're still saturated period.

Right.  You cannot shape the downlink.  You can only police it to
prevent packet loss.

 No QoS in the world outside of your
 provider and more bandwidth can alleviate that.

If more bandwidth is an option, but I already stated that for many
people, it's not an option.  They have exactly one or two choices and
they are subscribed to their maximum available.

 QoS on a home router... Useless COMING IN. Going out...
 Means little but helps MINIMALLY.

Not at all little.  If you have a lot of low priority outgoing traffic
(i.e. p2p) saturating your link, uplink traffic shaping will mean the
difference between a completely unintelligible call and something very
acceptable.

b.



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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread J. Oquendo
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Brian J. Murrell wrote:

| Not at all little.  If you have a lot of low priority outgoing traffic
| (i.e. p2p) saturating your link, uplink traffic shaping will mean the
| difference between a completely unintelligible call and something very
| acceptable.

Is it? So you're telling me if you're saturated on the way in, fixing up
your packets on the way out is the solution.


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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Brian J. Murrell
On Thu, 2008-04-17 at 09:25 -0400, J. Oquendo wrote:
 
 Is it? So you're telling me if you're saturated on the way in, fixing up
 your packets on the way out is the solution.

I think I've made it clear that my argument is only about uplink shaping
and the requirement for it given the asymmetric nature of a lot of last
mile connections existing today.  Funny enough that is *exactly* what
the OP was asking about.

b.



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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread J. Oquendo
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Brian J. Murrell wrote:

| I think I've made it clear that my argument is only about uplink shaping
| and the requirement for it given the asymmetric nature of a lot of last
| mile connections existing today.  Funny enough that is *exactly* what
| the OP was asking about.
|
| b.

Answers the question with minimal relevance, not even a band-aid
solution. You fixing up inbound traffic will do nothing for a horrible
conversation if you're congested coming in. Solution would be to add
more bandwidth. Else you could fiddle around around creating all the
fuzzy rules on the planet shaping traffic all sorts of methods once its
in your CPE but this WILL NOT HELP YOU HAVE A BETTER CONVERSATION. When
it does, when someone can realistically point this out please let me
know so I can switch from a DS3 to T1 and save money.

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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Michael Graves

May I suggest the following read:

A Beginners Guide To Successful VOIP Over DSL

http://www.smallnetbuilder.com/content/view/30340/83/

Which covers both QoS and traffic shaping in small routers. It was
written based upon my own experience with both Asterisk and hosted PBX
providers.

Michael

On Thu, 17 Apr 2008 07:16:40 -0400, sil wrote:

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Simon wrote:

| Is this worth doing? If so, what ports should i specifiy?


http://www.bricklin.com/qos.htm


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--
Michael Graves
mgravesatmstvp.com
http://blog.mgraves.org
o713-861-4005
c713-201-1262
sip:[EMAIL PROTECTED]
skype mjgraves
[EMAIL PROTECTED]





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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Mike
My personnal experience is if you`re looking for an inexpensive solution
(SOHO), StreamEngine based routers (a lot of D-Link products are
Streamengine based, for example the DI-724GU and the DIR-655) do a decent
job of providing QoS on the upstream, which is where you (usually) need it
anyways. And the good thing is you often do not have to do anything but set
the upload bandwidth (yes there is an automatic mode, but it's not that
great).


Mike


 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of 
 Michael Graves
 Sent: Thursday, April 17, 2008 10:34
 To: Asterisk Users Mailing List - Non-Commercial Discussion
 Subject: Re: [asterisk-users] QOS for outgoing SIP ... Who 
 needs QoS anyway!
 
 
 May I suggest the following read:
 
 A Beginners Guide To Successful VOIP Over DSL
 
 http://www.smallnetbuilder.com/content/view/30340/83/
 
 Which covers both QoS and traffic shaping in small routers. 
 It was written based upon my own experience with both 
 Asterisk and hosted PBX providers.
 
 Michael
 
 On Thu, 17 Apr 2008 07:16:40 -0400, sil wrote:
 
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1
 
 
 
 Simon wrote:
 
 | Is this worth doing? If so, what ports should i specifiy?
 
 
 http://www.bricklin.com/qos.htm
 
 
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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Chris Mason (Lists)
Mike wrote:
  do a decent
 job of providing QoS on the upstream, which is where you (usually) need it
 anyways. 

QOS can only be on outgoing, you can't set the priority of a packet 
after you receive it. The only other solution would be the cooperation 
of the ISP to provide QOS upstream of you. Good luck.

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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Brian J. Murrell
On Thu, 2008-04-17 at 11:40 -0400, Chris Mason (Lists) wrote:
 Mike wrote:
   do a decent
  job of providing QoS on the upstream, which is where you (usually) need it
  anyways. 
 
 QOS can only be on outgoing,

Which is what he meant when he said upstream I believe.

 you can't set the priority of a packet 
 after you receive it.

Indeed.

 The only other solution would be the cooperation 
 of the ISP to provide QOS upstream of you. Good luck.

Heh.  Yeah, no doubt.

b.



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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Ira
At 05:59 AM 4/17/2008, you wrote:
Not at all little.  If you have a lot of low priority outgoing traffic
(i.e. p2p) saturating your link, uplink traffic shaping will mean the
difference between a completely unintelligible call and something very
acceptable.

My network looks like this:

Cable modem  Linksys WRT54GS running Sveasoft
 LAN port 1 to the phone system running on it's own 
set of wires
 LAN ports 2-4 to everything else

I've set the priority on port one to the highest and the priority on 
all the other ports to low and as far as I can tell, we've never had 
an issue where a big upload has impacted our voice calls. 


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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Mojo with Horan Company, LLC
J. Oquendo wrote:
 Its fine and dandy, but the problem is you're still getting 5 packets.
 You're still saturated period. No QoS in the world outside of your
 provider and more bandwidth can alleviate that. Your provider is not
 going to care what you do once its passed to the CPE. So look at it
 logically again. QoS on a home router... Useless COMING IN. Going out...
 Means little but helps MINIMALLY.
   
I think the road to success, when talking about upstream at least, is 
partially paved by trying to keep maximum traffic at 4 packets instead 
of 5, if 5 is going to saturate the link.

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Re: [asterisk-users] QOS for outgoing SIP ... Who needs QoS anyway!

2008-04-17 Thread Mojo with Horan Company, LLC
J. Oquendo wrote:
 it does, when someone can realistically point this out please let me
 know so I can switch from a DS3 to T1 and save money.
   

Use the T1 for voice and get a DSL modem for your data use? :)

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