Do I need internet VLAN routing?

Cisco Catalyst 3560 24pt 10/100 poe 2 sf...
July 21, 2010 at 03:02:27
Specs: Windows XP
Hello and thanks for reading!

I have a 3560 switch where I have created a VLAN foe rthe IP phones, the PBX and I also attached one router to the same VLAN ports for the VoIP to use that Internet connection. I have several other users in the same swith (and others) in the default VLAN. All the users in the default VLAN are using a different Internet connection.

I need some of the users in the dafault VLAN to use the VoIP router as their gateway to Internet.

As I don't have many clients in the network, I have everything in the same subnet.

Is there any easy way to route between the default and the VoIP VLAN? I only need access to the router (192.168.160.5).

What do you experts suggest?,

Jud


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#1
July 21, 2010 at 07:43:45
I need some of the users in the dafault VLAN to use the VoIP router as their gateway to Internet.

Why?

In my world, we keep them separate because the VoIP traffic leaves the network, passes through the VoIP Controller and then into our PBX. The controller would drop the data traffic down a bit bucket and that would be the last you'd see of it since it doesn't belong.

You state, "As I don't have many clients in the network, I have everything in the same subnet."

Two issues here:

1) If you don't have many clients then why, for goodness sake, do you want to shove data traffic in with the VoIP? VoIP is a higher priority type of traffic (QoS) so mucking your VoIP network up with data traffic makes no sense when you don't have to.

2) Your data and VoIP subnets should be different and separate.

example:

Data:
VLAN 1 = 192.168.1.0/24

VoIP:
VLAN 2 = 192.168.2.0/24

You should have a DHCP server configured in each and no route's between. One SOHO Router for each VLAN would be sufficient to do the DHCP and provide firewall.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#2
July 22, 2010 at 13:46:34
Thank you very much for your advice Curt, I'll follow it.

I thought that as we have only 2 SIP lines, I could use the ADSL for some low Internet usage users, but this could change and we could get 2 more SIP lines to replace our 2 ISDNs.

I'll change the VoIP devices to a different subnet then.

Thanks again and have a great day,
Jud


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#3
July 22, 2010 at 13:56:42
Your VoIP provider should have given you all the information regarding VoIP you needed. Before you do anything else, I would contact them and ask them about the proper setup for their VoIP.

Since you have a small number of users, I would leave all data on one internet connection and the VoIP on the other. This way, the nonVoIP data won't cause any issues with the VoIP (ie: interfere with it).

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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