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Asterisk Network Config

Posted on 2006-05-21
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Hi, I'm about to install an Asterisk server with 20 SIP phones on a 30 system network.

which of the following is the best config:

1) Seperate Subnets: 30 system network runs on 10.0.0.1-30  and 20 SIP phones and Asterisk Server sits on 10.0.1.1-20

2) If i were to use a VLAN what's the best config?  I'm a bit rusty with VLAN config so please be specific as possible.

Thanks in advance!
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Question by:jetli87
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by:grblades
ID: 16732324
It depends if your switches support QOS. If they do then configure a separate VLAN for use by the phones only and use a different IP address range.
If the switches dont support QOS then it wont make any difference.

You only need QOS on the switches if it is likely that the port on the switch will become saturate. Having gigabit on the servers could cause someone to be able to saturate the link downloading something to their PC and so in this case it would be best to use QOS. An alternative would be to use completely separate switches for the phones.
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by:jetli87
ID: 16732485
I actually just purchase new switches that support vlan and QOS.

to be clear, so i would setup a vlan for the phones using a different subnet?  or a different set of range on the same subnet with the workstations?  

sorry if that question seems a bit lame, again, I'm fuzzy on my reason for VLANs.  I'm unsure if VLAN is used to segregate traffic for workstations sitting on the same subnet, i.e. 10.20.100.1-20 = 1st net and 10.20.100.21-30 = 2nd or what?)

And yes my servers are connected via gigabit ports.

i appreciate the response, get back to me when you can.
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grblades earned 2000 total points
ID: 16732587
Yes setup a VLAN for the phones using a different subnet. Technically as the networks are separate you dont 'have' to have a separate subnet but it is a good idea incase you ever want to route between them in the futire.

If you are using 10.20.100.x/255.255.255.0 as your main network then use something like 10.20.101.x/255.255.255.0 for the phones.

Using VLANS enables you to keep the voice and normal network traffic completely separate. Its effectivly like having two completely different networks. On the switch you normally set the voip VLAN as being on the trunk. Then the phone is configured to use tagging so that the phone connects to the switch and sends all calls over the voip VLAN. The phones switch port then connects to the PC.
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by:jetli87
ID: 16753758
Good Stuff GRBLADES!

I'll be setting up everything in the next few weeks, so I'll post another question if i have trouble...thanks again.
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