Author Topic: Multiple Vlan with one DHCP from 3300  (Read 7495 times)

Offline johnp

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Re: Multiple Vlan with one DHCP from 3300
« Reply #15 on: August 05, 2014, 11:54:45 PM »
You really need to describe your infrastructure better. Are all the switches connected via a backbone, or is there some routers being used? Is the default data going to be different subnets for each floor also?

With answers to these question, it will be easier to make recommendations.

In scenario 1, same default data network, common phone network and backboned switches, I would just change the netmask and use lldp or central dhcp server with the Mitel option 125 to put the phones on their vlan.

In scenario 2, separate data networks, separate phone network, some routing going on between the phone networks. I'd be inclinded to setup something like vlan11 data vlan 101 voice for 1st floor, vlan12 data vlan 102 voice 2nd floor etc (this would keep the default vlan1 open as a mangement vlan). You could the use lldp and/or local dhcp to send the phone to the correct vlan where it would see the helper address and have it's dhcp sent to the MiVoice :-)

In the 3300 you would define all networks, created the dhcp address range and setup the options per subnet rather than global.

I suppose you could also have some hybrid where there is a backbone, data networks are separate but voice is just one big network.

I don't know your reasoning behind the setting up the voice as described. If the purpose is to keep thing simple, I think it becomes more complicated. I would use an extension numbering scheme per floor to do KISS



Offline louisesmith

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Re: Multiple Vlan with one DHCP from 3300
« Reply #16 on: August 06, 2014, 01:13:19 PM »
This install have 4 floors and each floor have about 200 IP phones so therefore we will have about 600 IP phones. I am not sure what is the best setup for this deployment but to my knowledge, I need to create 4 vlans,  4 subnets, 4 scope option 125 for each floor and DHCP helper for 3rd/4th and 5th floor.

Data network, Vlan 1
2nd floor, Vlan 2: 10.10.2.x/16
3rd floor, vlan 3: 10.10.3.x/16
4th floor, vlan 4: 10.10.4.x/16
5th floor, vlan 5: 10.10.5.x/16


If I use one vlan and create 4 IP ranges in the PBX and the first range is out of IP address, how will the phones go to the next range as per Sarond's post?


Thank you guys very much for your help

Offline ralph

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Re: Multiple Vlan with one DHCP from 3300
« Reply #17 on: August 06, 2014, 02:58:46 PM »
I don't think you're going to be able to use a /16 on 4 VLANs like you're suggesting.
You'll need to use a /24 and then you'll need a router in between.

What's driving the need to have a different subnet on each floor?

Ralph


Offline johnp

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Re: Multiple Vlan with one DHCP from 3300
« Reply #18 on: August 06, 2014, 04:41:22 PM »
The simplest setup would be vlan 1 data, vlan 2 voice. Change the ip values in the 3300:

System IP Properties

System IP Address                 10.10.0.2
Subnet Mask                          255.255.252.0
Gateway IP Address              10.10.0.1
Layer 2 Switch IP Address     10.10.0.3

DHCP Server        enabled

DHCP Subnet

Add new
Name                                    10_10_0_subnet
IP Address                            10.10.0.0
Bit Mask                                255.255.252.0

DHCP IP Address Range

Add new
Name                                                        ipphone.mitel.com
IP Range Start                                          10.10.0.20
IP Range End                                            10.10.3.254
Protocol                                                     BootP or DHCP
Client's Class ID Must Match Name            False
Lease Time                                                1
Lease Unit                                                 Weeks

DHCP Options

Change value for router                           10.10.0.1
Change values in 125

delete old values for DHCP IP Address Range and DHCP Subnet then reboot

This will provide roughly 1000 leases

Offline louisesmith

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Re: Multiple Vlan with one DHCP from 3300
« Reply #19 on: August 06, 2014, 08:03:27 PM »
Thanks JohnP, your post is very informative. This is the simplest setup but what is the best way for this install?
Is there any disadvantage of doing the easy way?

Offline johnp

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Re: Multiple Vlan with one DHCP from 3300
« Reply #20 on: August 07, 2014, 07:42:09 AM »
The disadvantage would be that it is a bigger broadcast domain. Troubleshooting and isolating any issues may be more difficult.

This would also apply to the data vlan structure


 

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