Re: Voice Traffic

Hi,

Does this looks ok?

Voice_Gateway : 10.255.1.100/24
access-list 100 permit udp host 10.255.1.100 any range 16384 32767

class-map match-all VG
match ip access-group 100

policy-map VG
class VG
priority percentage 60
class class-default
fair-queue

int f 0/0.99
service-policy output VG

On Mon, Sep 6, 2010 at 2:20 AM, Ryan West <rwest_at_zyedge.com> wrote:

> Kazi,
>
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> > Behalf Of karim jamali
> > Sent: Sunday, September 05, 2010 7:05 PM
> > To: Kazi Junaid; Cisco certification
> > Subject: Re: Voice Traffic
> >
> > Hi Kazi,
> >
> > I guess you are looking for LLQ solution and what it does is the
> following:
> > 1.Gives priority to voice traffic by putting it inside a priority queue
> which gets
> > serviced first.
> > 2.You wouldn't want your voice traffic to kill other applications, thus
> you will
> > need to put an upper limit to this prioritized traffic, i.e. you are
> saying I will
> > guarantee voice is service first with an upper limit of 1Mbps, if this
> limit is
> > exceeded, well it depends on how the link is doing, if it is fine than
> than you
> > will still have it working perfectly, if the link is congested, you are
> only
> > guaranteed up to 1Mbps of excellent service, more than that you will lose
> > the guarantee.
> >
> > Steps:
> > 1.You will need to match the traffic which I guess is the RTP (udp 16384
> > 32767)
>
> Assuming this a standards based VoIP solution, you could match on protocol
> RTP audio, DSCP 40/46, or ACL that specifies voice IP ranges and the UDP
> range listed above.
>
> However, above this all this, you need to work with your MPLS provider to
> ensure they are treating your voice as a gold/real-time/insert your favorite
> most expensive marketing term for priority traffic here. You can queue
> outbound as much as like, but if your provider isn't doing the same it could
> be in vain
>
> For LLQ:
>
>
> http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/qcfwfq_ps1835_TSD_Products_Configuration_Guide_Chapter.html#wp1022204
>
> From a carrier's perspective:
>
>
> http://www.google.com/url?sa=t&source=web&cd=1&ved=0CBIQFjAA&url=http%3A%2F%2Fwww.globalcrossing.com%2Fdocs%2Fipkc%2Fmpls_qos.ppt&ei=ViWETOjLB4L88Abs_6nzAQ&usg=AFQjCNGr2ego_xozF_67wXLO7RUwGVrmWw
>
> -ryan

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Received on Mon Sep 06 2010 - 02:23:04 ART