From: dusth@comcast.net
Date: Thu Aug 26 2004 - 16:17:55 GMT-3
Router config:
class-map match-all voicecontrol
match ip dscp af31
class-map match-all voicebearer
match ip dscp ef
!
!
policy-map voicepolicy
class voicebearer
priority percent 8
class voicecontrol
bandwidth percent 1
class class-default
fair-queue
Apply this on all ethernet (uplink) interface
service-policy output voicepolicy
Switch Cnfig :
policy-map autoqos-voip-policy
class class-default
dbl
Apply this on lan interfaces:
qos trust device cisco-phone
qos trust cos
service-policy output autoqos-voip-policy
auto qos voip cisco-phone
tx-queue 3
priority high
shape percent 33
Let me know if this works or not.
Dustin
-------------- Original message --------------
> After digging deeper, I found out that the Internal IP calls and Intertrunk
> IP calls are not having problems. The conversation gets dropped for
> example, if customer call from his IP Phone to my Cell Phone that requires
> the PSTN Gateway. Suddenly the customer won't be able to hear me, but I can
> hear the customer. My take is on that
>
> IP Phones are connected to 3750 switches. 3750 Switches are uplinked to
> 4507 switch/router. 4570 connects to 3745 (VOIP Gateway) through Ethernet.
> 3745 has 3 PRI T1s for Voice traffic, and 4-port ATM for data traffic. I
> think the issue is the connection between 3745 and 4507 switch. Since QOS
> is not setup on
> 4507 switch, the data and voice traffic have some priority over the Ethernet
> Link. But if that was the case then the Intercluster Trunk Calls would also
> have problems, but call between TIE trunk are okay.
>
> Any other suggestions
> ----- Original Message -----
> From: "Swaroop Potdar"
> To: ;
> Sent: Wednesday, August 25, 2004 11:52 PM
> Subject: RE: QOS Problem
>
>
> > HI,
> >
> > Enable Qos globally on your 4500.
> >
> > and then use trust cos on your interfaces with a cos to dscp mapping
> table.
> >
> > or you can simply use "auto qos voip trust" command on the trunk to your
> > 3750 siwtch.
> >
> > you can go through this link for more details.
> >
> >
> http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_19/config/qos.h
> tm
> >
> > pls give your inputs so we also can learn more... :-)
> >
> > Thanks,
> > Swaroop.
> >
> >
> > >From: "Richard Anderson"
> > >Reply-To: "Richard Anderson"
> > >To:
> > >Subject: QOS Problem
> > >Date: Wed, 25 Aug 2004 22:45:15 -0700
> > >
> > >What is the recommended QOS settings for Cisco IP Phones.
> > >
> > >If all of the IP Phones belong to one VLAN then one simply enable
> > >
> > >mls qos
> > >mls qos trust cos on all interfaces, but what the approach should be if
> > >there is a layer III switch such as 4507 which is doing intervlan routing
> > >for multiple Voice VLANS.
> > >
> > >I have a 4507 switch which is configured for 3 voice vlans and also doing
> > >routing for these three voice vlans. Each floor has 3750 switch uplinked
> > >to
> > >4507 switch. I am having an issue with voice quality as well as Phone A
> > >can
> > >hear Phone B, but Phone B can't hear Phone A
> > >
> > >On 3750, I have configured
> > >
> > >mls qos
> > >
> > >interface x
> > >mls qos trust cos.
> > >
> > >What should be on 4507 switch.
> > >
> > >Urgent help needed.
> > >
> > >Thanks,
> > >
> > >_______________________________________________________________________
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> >
> >
> > Regards,
> > Swaroop.
> > ------------------------------------------------------------------
> > Life Is Short & Sweet.
> > Live It To The Fullest.
> > ------------------------------------------------------------------
> >
> > _________________________________________________________________
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>
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