From: Gavin Lawson (GavinL@titan.net.au)
Date: Sun May 27 2007 - 23:02:56 ART
Hi All
Yes, IPCC is being used as the software based phone.
The problem I have is NOT the marking of packets. I am happy that the
IPCC software parks the packets.
And I can confirm that the packets are being parked by issuing the "sh
mls qos interface Fa0/X statistics" on the next hop MLS.
The problem is the PC doesn't have a priority queue OR at least I can't
find how to configure one?
An example of my problem is.
What if the Tx queue on the PC gets 10 1500 bytes data pakets?
Then a Voice packets is placed in the Tx queue?
The first 1500 byte data packet would keep transmitting until
complete.
What I want to happen next, just like in a router or switch with a
priority queue, the voice packet should be transmitted ahead of the
other 9 1500 byte data packets.
But this doesn't appear to be configurable?
Simply marking a packet as EF does not mean it will be transmitted ahead
of any other marked packet.
Classification and Queueing also need to be configured.
Has anybody thought about this?
Is their a solution to put a priority queue on a PC?
GL
________________________________
From: Vince Mashburn [mailto:cciegroupstudy@gmail.com]
Sent: Saturday, 26 May 2007 2:47 AM
To: kaelwyoung@netscape.net
Cc: Gavin Lawson; ccielab@groupstudy.com
Subject: Re: Prioritiesing Voice out of a PC using a soft phone?
Are you using the IPCC agent software? If so, I believe that it tags
the traffic appropriately for you. It is built into the app. You can
always span a port and use Ethereal to verify though.
On 5/25/07, kaelwyoung@netscape.net <kaelwyoung@netscape.net> wrote:
Gavin,
B B B B B B B B B B If you enableB packet scheduler on the pc
you also enable
DSCP .
Default DSCP values can be editedB by using windows B Group
Policy.
The network control service cannot be requested through the GQoS
API. However,
it can be requested by network management applications that use
the traffic
control (TC) API.
B B B B B There is more on the subject here:
http://technet2.microsoft.com/windowsserver/en/library/a9b9d7f3-ff08-4c4
9-b8a
7-b92e9ce080101033.mspx?mfr=true
B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B
B B B B B B B
B B B B B B B B B B Regards,
B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B
B B B B B B B
B B B B B B B B B B B B Karl.
-----Original Message-----
From: Gavin Lawson <GavinL@titan.net.au>
To: ccielab@groupstudy.com
Sent: Fri, 25 May 2007 3:20 am
Subject: Prioritiesing Voice out of a PC using a soft phone?
Hi GS
I went to the local Cisco Office the other day to verify a
unique VoIP
PT design for one of our clients.
To simplify things a call centre is piloting IP Telephony on
PC's
ne of the questions the SE asked me was if the PC's are
prioritising
he Voice traffic out?
- I can confirm that packets are being marked correctly with CS3
and EF
arkings, but reading further the operating system doesn't appear
to
ave any Priority Queue feature?? I have looked at the Windows XP
"QoS
acket Scheduler" but this appears to use RSVP and we aren't
using this.
Has anyone come across this before?
as anyone had any previous experience with poor performance with
Soft
hones because of PC queuing?
ny suggestions on reading material on this issue and ways to
overcome
t?
nyone know what the standard FIFO queue depth is for a PC?
NOTE: The pilot is running with 23 users at the moment and the
users
ays the voice quality is no better or worse than the TDM
solution.
GL
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