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Hi,
have limited knowledge of QOS and need to configure QOS on our
2950s that's running our phone system asterisk, we are using a
combination of polyocm and aastra sip phones.
I hope like to configure QOS on and get rid of our current choppy
calls - anyone can give me an idea or example of the commands I will
use for QOS?

add this to your phone int. works fine for us. Also you will need qos on
router as well.

switchport priority extend cos 0

<> wrote in message
news: ups.com...
> Hi,
> have limited knowledge of QOS and need to configure QOS on our
> 2950s that's running our phone system asterisk, we are using a
> combination of polyocm and aastra sip phones.
> I hope like to configure QOS on and get rid of our current choppy
> calls - anyone can give me an idea or example of the commands I will
> use for QOS?
>

On Oct 1, 3:15 pm, "luvsmecats" <luvsmec...@hotmail.com> wrote:
> add this to your phone int. works fine for us. Also you will need qos on
> router as well.
>
> switchport priority extend cos 0
>
> <mikeg...@gmail.com> wrote in message
>
> news: ups.com...
>
> > Hi,
> > have limited knowledge of QOS and need to configure QOS on our
> > 2950s that's running our phone system asterisk, we are using a
> > combination of polyocm and aastra sip phones.
> > I hope like to configure QOS on and get rid of our current choppy
> > calls - anyone can give me an idea or example of the commands I will
> > use for QOS?

Do i apply that to all my ports on my switch ?

[thort]

QoS needs to be applied to all the access ports that the phones are connected to, the trunk links that interconnect the switches, and the IP router(s).

On Oct 1, 3:47 pm, mikeg...@gmail.com wrote:
> On Oct 1, 3:15 pm, "luvsmecats" <luvsmec...@hotmail.com> wrote:
>
>
>
> > add this to your phone int. works fine for us. Also you will need qos on
> > router as well.
>
> > switchport priority extend cos 0
>
> > <mikeg...@gmail.com> wrote in message
>
> >news: oups.com...
>
> > > Hi,
> > > have limited knowledge of QOS and need to configure QOS on our
> > > 2950s that's running our phone system asterisk, we are using a
> > > combination of polyocm and aastra sip phones.
> > > I hope like to configure QOS on and get rid of our current choppy
> > > calls - anyone can give me an idea or example of the commands I will
> > > use for QOS?
>
> Do i apply that to all my ports on my switch ?

I think based on what i have seen this command is for cisco ip phones
or will that work on any ip phone ?

We ar using it on Cisco phones but we also have customers that have a PBX
and non Cisco phones. NP
<> wrote in message
news: ups.com...
> On Oct 1, 3:47 pm, mikeg...@gmail.com wrote:
> > On Oct 1, 3:15 pm, "luvsmecats" <luvsmec...@hotmail.com> wrote:
> >
> >
> >
> > > add this to your phone int. works fine for us. Also you will need qos
on
> > > router as well.
> >
> > > switchport priority extend cos 0
> >
> > > <mikeg...@gmail.com> wrote in message
> >
> > >news: oups.com...
> >
> > > > Hi,
> > > > have limited knowledge of QOS and need to configure QOS on our
> > > > 2950s that's running our phone system asterisk, we are using a
> > > > combination of polyocm and aastra sip phones.
> > > > I hope like to configure QOS on and get rid of our current choppy
> > > > calls - anyone can give me an idea or example of the commands I will
> > > > use for QOS?
> >
> > Do i apply that to all my ports on my switch ?
>
> I think based on what i have seen this command is for cisco ip phones
> or will that work on any ip phone ?
>
>

mikeg...@gmail.com wrote:
> Hi,
> have limited knowledge of QOS and need to configure QOS on our
> 2950s that's running our phone system asterisk, we are using a
> combination of polyocm and aastra sip phones.
> I hope like to configure QOS on and get rid of our current choppy
> calls - anyone can give me an idea or example of the commands I will
> use for QOS?

Originally, I enabled AutoQoS.

Then, seeing that the automatic QoS configuration had
mls qos trust cos,
and all DSCP codes were being lost through trunk ports, I changed each
interface to this:
mls qos trust dscp

After that, I was asked to configure QoS to specifically identify
voice traffic and give it a high DSCP code and a 0 DSCP code for all
other traffic, so I did this:

!
class-map match-all voice
match access-group name voice.traffic
!
policy-map Assign.DSCP
class voice
set dscp ef
!
ip access-list extended voice.traffic
permit ip 10.20.0.0 0.0.255.255 any
!
interface FastEthernet1/0/14
switchport trunk encapsulation dot1q
switchport mode trunk
service-policy input Assign.DSCP
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
auto qos voip trust
spanning-tree portfast
!

Having said that, if you don't know *why* the voice is "choppy", then
chances are that QoS *won't* fix it - 99% of voice-quality problems
will be caused by bad configuration of the voice system itself, and
not the network (until you come to put it across WAN links).

Get Wireshark onto the network and capture an entire phone call - the
summarised rtp stream details will show you the number of lost packets
(if any) as well as the average & maximum delays and jitter.

Check your jitter-buffer settings are comfortably higher than the
jitter shown in the rtp stream summary.