asterisk users - Feb 2009 - CISCO 2950 -> 4 connections -> Cap of 512 Kbps -> How to bond ?

The ISP giving net access at our office has installed a 24 port CISCO
2950 switch in our server room. I can buy 24 connections from them and
get 12Mbps of Upload but each individual connection is restricted to
512Kbps.
Currently we have requirement of 20 simulataneous calls so we
purchased 4 connections from the ISP. Giving us a total of 2 Mbps of
upload b/w but spread over 4 different connections from the ISP. Each
connection we buy from the ISP gives us the right to use one port on
this CISCO 2950 switch. So curretly we have purchased 4 connections
from the ISP and hence we have the right to use 4 ports on this
switch.

My three questions are:
1. Is there any technical reason behind why the ISP will not sell more
then 512 Kbps of b/w on a single port to us ?
2. Can I do something to over come the restriction put by the ISP.
3. Is there an automated script that can load balance the asterisk
calls across these 4 connections ?

Thanks,

On Thu, Feb 12, 2009 at 4:04 PM, Vikas <topgun9 at gmail.com> wrote:
> The ISP giving net access at our office has installed a 24 port CISCO
> 2950 switch in our server room. I can buy 24 connections from them and
> get 12Mbps of Upload but each individual connection is restricted to
> 512Kbps.
>
> My three questions are:
> 3. Is there an automated script that can load balance the asterisk
> calls across these 4 connections ?
>
This is crazy. Just tell the ISP that you want the port rate limit on a
single port to be 2M.

-- 
Heath Roberts
htroberts at gmail.com
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I have asked the ISP to rate limit a single port to 2M but my requests
have got me no where,

I would really appreciate any suggestions on what I can do at my end
since I have given up hope of the ISP co-operating with me,

Thanks,

On Thu, Feb 12, 2009 at 3:36 PM, Heath Roberts <htroberts at gmail.com>
wrote:
> On Thu, Feb 12, 2009 at 4:04 PM, Vikas <topgun9 at gmail.com> wrote:
>>
>> The ISP giving net access at our office has installed a 24 port CISCO
>> 2950 switch in our server room. I can buy 24 connections from them and
>> get 12Mbps of Upload but each individual connection is restricted to
>> 512Kbps.
>
>
>>
>> My three questions are:
>> 3. Is there an automated script that can load balance the asterisk
>> calls across these 4 connections ?
>
> This is crazy. Just tell the ISP that you want the port rate limit on a
> single port to be 2M.
> --
> Heath Roberts
> htroberts at gmail.com
>
>
> _______________________________________________
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>
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>   http://lists.digium.com/mailman/listinfo/asterisk-users
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On Thu, Feb 12, 2009 at 4:04 PM, Vikas <topgun9 at gmail.com>
wrote:
> My three questions are:
> 1. Is there any technical reason behind why the ISP will not sell more
> then 512 Kbps of b/w on a single port to us ?
Yes. Somebody programmed their equipment that way and didn't train
anybody else on Cisco before they got a better job. A Cisco 2950 can
do 100Mbps per port (or 1000Mbps if it's a 2950G), and while you can't
send all of that upstream, you can send way more than 12Mbps upstream.
> 2. Can I do something to over come the restriction put by the ISP.
Yep, lots of things, none of which are going to be as direct as
telling them that you've found another ISP who will give you what you
want, and either they can remain your ISP and rehire the guy who knows
how to program Cisco gear, or you are terminating your contract.

Unless you live truly in the middle of nowhere, you will be able to
find somebody else who can provide your phone service.

Also, twenty simultaneous connections sounds a lot like a traditional
T1. Call your phone company and compare the price of getting a T1
versus what these clowns are charging you. Just because you have voip
now, doesn't mean it's cheaper than POTS. Asterisk does a great job of
acting as a T1 to voip gateway. You can even get appliances for that
task.
> 3. Is there an automated script that can load balance the asterisk
> calls across these 4 connections ?
It will be way easier to write your termination letter than to write
that script. This is a human problem, and not an asterisk problem.

Vikas <topgun9 at gmail.com> writes:
> My three questions are:
> 1. Is there any technical reason behind why the ISP will not sell more
> then 512 Kbps of b/w on a single port to us ?
The copper to your location only handles 512kpbs per pair, so they add
an extra modem every time they open a new port?
> 2. Can I do something to over come the restriction put by the ISP.
Most likely not.
> 3. Is there an automated script that can load balance the asterisk
> calls across these 4 connections ?
If you get a different IP address on each port, it's hard. You'd need
a device which could do flow-based NAT, and that would only work for
outbound calls.

On the other hand, if the ISP cooperates, there are lots of options:
a) Multi-pair SDSL modems
b) Multi-link PPP
c) Equal-cost multipath


/Benny

Get a Cisco with five ethernet ports.  Use one for your connection to 
asterisk.  Use the other four as your connection to the ISP, and MUX them.

Great way to spend 5K :)

j

On Thu, 12 Feb 2009, Vikas wrote:
> I have asked the ISP to rate limit a single port to 2M but my requests
> have got me no where,
>
> I would really appreciate any suggestions on what I can do at my end
> since I have given up hope of the ISP co-operating with me,
>
> Thanks,
>
> On Thu, Feb 12, 2009 at 3:36 PM, Heath Roberts <htroberts at
gmail.com> wrote:
>> On Thu, Feb 12, 2009 at 4:04 PM, Vikas <topgun9 at gmail.com>
wrote:
>>>
>>> The ISP giving net access at our office has installed a 24 port
CISCO
>>> 2950 switch in our server room. I can buy 24 connections from them
and
>>> get 12Mbps of Upload but each individual connection is restricted
to
>>> 512Kbps.
>>
>>
>>>
>>> My three questions are:
>>> 3. Is there an automated script that can load balance the asterisk
>>> calls across these 4 connections ?
>>
>> This is crazy. Just tell the ISP that you want the port rate limit on a
>> single port to be 2M.
>> --
>> Heath Roberts
>> htroberts at gmail.com
>>
>>
>> _______________________________________________
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>
>> asterisk-users mailing list
>> To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>