[cisco-voip] QoS help

[Erick Wellnitz]

This particular fractional DS3 also serves some of our retail locations and
they have no issues.

On Mon, Mar 19, 2012 at 2:43 PM, Ki Wi <kiwi.voice at gmail.com> wrote:

>  Have you wondered the problem is with the alternate gateway with that
> toll free line?
>
> So far I have encounter 2 times whereby customer complain about voice
> quality issue while using isdn(!?!) but no problem with analog lines hosted
> in the same gateway. Both occasion are due to faulty telco equipment.
>
> Sent from my iPhone
> Pls pardon my fat fingers.
>
> On 16 Mar, 2012, at 5:10 AM, Erick Wellnitz <ewellnitzvoip at gmail.com>
> wrote:
>
>   I'm not a LAN/Ethernet QoS guru by any means.  Our network group has
> control over QoS and I'm trying to get to the bottom of an issue we've seen
> routing calls over a sip trunk to a location using a 1gig Ethernet
> connection on a DWDM ring.  No firewall is present.  The configuration
> doesn't seem quite right to me for some reason.
>
> Basically what we are doing is using an alternate PSTN gateway for toll
> free traffic until we get additional capacity added to handle the calls.
> Users report garbled audio and an 'underwater' quality of the audio.
> Getting information from the phone on call quality (jitter, etc) may not
> help because the calls complained about are to an external conference
> bridge via tol lfree number.
>
> If this config checks out, I plan to ask the network team if they can
> capture some data for this particular link.
>
>
> Here is the local end QoS config:
>
>
> mls ip cef load-sharing full
>
> mls netflow interface
>
> mls qos map cos-dscp 0 8 16 24 32 46 48 56
>
> mls qos
>
> mls cef error action reset
>
>
>
> interface GigabitEthernet3/43
>
> description GIG 3/43
>
> ip address X.X.X.X X.X.X.X
>
> ip flow ingress
>
> ip pim sparse-dense-mode
>
> ip summary-address eigrp 1 X.X.X  X X.X.X.X
>
> ip summary-address eigrp 1 X.X.X  X X.X.X.X
>
> ip summary-address eigrp 1 X.X.X  X X.X.X.X
>
> load-interval 30
>
> wrr-queue bandwidth 30 40 30
>
> wrr-queue queue-limit 40 30 15
>
> wrr-queue threshold 2 60 80 100 100 100 100 100 100
>
> wrr-queue threshold 3 60 80 100 100 100 100 100 100
>
> wrr-queue random-detect min-threshold 1 40 60 80 80 80 80 80 80
>
> wrr-queue random-detect max-threshold 1 70 80 100 100 100 100 100 100
>
> no wrr-queue random-detect 2
>
> no wrr-queue random-detect 3
>
> wrr-queue cos-map 1 3 0
>
> wrr-queue cos-map 2 1 1
>
> wrr-queue cos-map 2 2 2
>
> wrr-queue cos-map 2 3 4
>
> wrr-queue cos-map 3 2 3
>
> wrr-queue cos-map 3 3 6 7
>
> mls qos trust dscp
>
>
>
> Here is the remote end:
>
> interface GigabitEthernet1/36
>
> description GIGABIT E/NET 1/36
>
> ip address X.X.X.X  X.X.X.X
>
> ip flow ingress
>
> ip pim sparse-dense-mode
>
> load-interval 30
>
> no wrr-queue random-detect 2
>
> no wrr-queue random-detect 3
>
> wrr-queue cos-map 1 3 0
>
> wrr-queue cos-map 2 1 1
>
> wrr-queue cos-map 2 2 2
>
> wrr-queue cos-map 2 3 4
>
> wrr-queue cos-map 3 2 3
>
> wrr-queue cos-map 3 3 6 7
>
> mls qos trust dscp
>
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>
>
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