how to seperate bandwidth for voice and data from 2600 router

hi all
 i am using scpc for uplink and DVB for down link i have 128 uplink and 256 for downlink , i am using router  2600 series router ... i am using voice as well as data from this link .it is working good .. but  deu to high bandwidth taken by data my voice quality is not good so i want to serprate bandwidth for voice and data ... is this possible if yes can u pls sned me some configuration or some documents regarding this ... so that i can seperate bandwidth for both of this
sachhamAsked:
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sachhamAuthor Commented:
hi all
 i am using scpc for uplink and DVB for down link i have 128 uplink and 256 for downlink , i am using router  2600 series router ... i am using voice as well as data from this link .it is working good .. but  deu to high bandwidth taken by data my voice quality is not good so i want to serprate bandwidth for voice and data ... is this possible if yes can u pls sned me some configuration or some documents regarding this ... so that i can seperate bandwidth for both of this
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sheahmedCommented:
sachham,
How many voice channels you want to use simultaneously? there are many options of bandwidth management and optimization.

There are so many options and we should look all of them ...

If you have a single FXS card in your router then you can play 2 voice channels simultaneously incase you have cisco 2FXS, or 4 voice channels if you have 4FXS ...

What codec are you using ... ???  if you are using default, which is G729r8 then single voice channel will take not more than 14k.

If i m going in the right direction (i.e. voice card scenario) and if your use is quite frequent then you can dedicate bandwidth for voice and it is possible by applying feature of rate-limit on your specific interface ....

Rate-Limit is quite simple ...

- Make an access-list, define the traffic of voice in it  ...
- Define Rate Limit, mostly in the multiples of 8k, upto your need (how many channels you use simultaneously)  ...  you can apply rate-limit for both in-bound and out-bound traffic ...

Another Good Opttion is to mention ...

" ip precedence 5 " on the dial-peer ...

But if you are talking about the normal voice traffic (generating from your users end) then ... you have to go through priority queueing or Low Latency Queueing to assign high priority to the users' voice traffic ...

Kindly explain your scenario in detail ... if you still have'nt got the answer ...

Regards,
Sheeraz Ahmed
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sachhamAuthor Commented:
thanks u sheearz

i an not using any vioce moudle in my router i am useing  seperate voip device like neuro
seniro it line this
 my router ethernet  is connected to switch and my voice device neuro's ethernet is also connected to ethernet   in vpio device there is  8 port for telephone line from this i will call outside using telephone line to neuro .. neuro to router and router to outside .
here i am using data and voice  i meen i am using internet as well as viop from this ... i will give one ip address to this voip device neuro ... so i want to restrict this voip device to certain uplin and down link bandwidth as well as restrice the bandwidth for data ... cause if my data use become high it will not effect my voice bandwidth
 
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sheahmedCommented:
u r welcome sachham,

router(config-if)# rate-limit input access-group 101 32000 8000 16000 conform-action transmit exceed-action drop

here ...
access-group 101 is the traffic which will be limited to 32k ...
8000 is normal burst size
16000 is excess burt size

now its up to you, which one of the traffic (i.e. voice or data) you want to restric ... Define that traffic into the access-list 101 and you will be able to limit that specific traffic upto 32k or whatever u want ...

you can mention traffic of your voice by implementing an access-list which filters the source ip's, because your voice traffic will have the source ip of that voip device ...

better to monitor and get the exact figure of bandwidth utilized by voip when all of the 8 ports are in function ... u can monitor it using any mrtg, or any snmp traffic plotter ...


Regards,
Sheeraz Ahmed
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