Help with a little QoS

[gevorkya99]

Have a bit of a dilemma on my hands, let me paint the picture:

I have two offices connected by two bonded point to point T1s

I’m on old 1841 routers with 2 WIC-1DSU-T1V2 cards

Data connection seems to be great, T1s bond and give me whopping 3megs of bandwidth 

Problem comes in when I have two of Adtran MX408e Pseudowire Gateways hooked up to the second Ethernet port on those routers – these gateways provide phone functionality between the two offices as we have a really old phone switch that we have to use(no VoIP).

More info on Adtrans -

http://www.adtran.com/web/page/portal/Adtran/product/1189608L1/255

I’m trying to get some sort of QoS going to reserve some(512 k) of bandwidth for these gateways as if I don’t, when traffic increases or pegs the bandwidth limitation I have with only 3megs, the voice calls get static on the lines and become unbearable at times.

I’m attaching parts of the config for both routers and I hope I implemented the QoS properly.

Please let me know if you have the same scenario or if there’s something you could suggest to fix my issue…or if I made a mistake in what I configured.

Thanks in advance

[Joseph W. Doherty]

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Posting

It looks to me you're on the right path.  You might want to add class-default with fair-queue and you also might want to reduce tx-ring-limit on your MLPPP interface.

[gevorkya99]

Could you give me specific commands for what you're suggesting - my QoS experience is novice at best

[Joseph W. Doherty · Accepted solution]

policy-map VOICE

class VOICE

  priority 512

class class-default

  fair-queue

interface Multilink1
ip address 10.1.2.61 255.255.255.252
ppp multilink
ppp multilink group 1
service-policy output VOICE

tx-ring-limit 2

[gevorkya99]

This needs to be done on both routers i'm assuming?

Also, wanted to make sure that it should be

service-policy output VOICE

on both and not input on one...right?

[Joseph W. Doherty]

yes and yes

[gevorkya99]

made the changes, it did add an extra command

ip address 10.1.2.62 255.255.255.252
tx-ring-limit 2
tx-queue-limit 2
ppp multilink
ppp multilink group 1
service-policy output VOICE

is that ok?

[Joseph W. Doherty]

yep