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Mitel MiVoice Business/MCD/3300 / Re: How many phones per vlan/subnet?
« on: October 31, 2018, 05:09:33 PM »
Thanks to everyone for their input. We will be creating separate voice vlans for the 6 buildings on our campus.
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Mitel MiVoice Business/MCD/3300 / Re: How many phones per vlan/subnet?
« on: October 28, 2018, 07:58:00 PM »
We have 5 academic buildings on campus and a bus garage/maintenance building. We have separate vlans/subnets per building for wired devices (desktop computers and printers). We also separate vlans per building for district owned wireless devices (laptops and Chromebooks). We have a single district wide vlan for personal wireless devices, primarily phones.
We have separate vlans for infrastructure items like servers, storage, ESXi hosts, video cameras, HVAC equipment, vMotion, and Lighting. We are leaning towards one single vlan for phones to follow the KISS principle (keep it simple). Is there a good reason to put in 6 separate vlans for phones, one per building? It is certainly easier to apply QoS rules with a single vlan.
We have separate vlans for infrastructure items like servers, storage, ESXi hosts, video cameras, HVAC equipment, vMotion, and Lighting. We are leaning towards one single vlan for phones to follow the KISS principle (keep it simple). Is there a good reason to put in 6 separate vlans for phones, one per building? It is certainly easier to apply QoS rules with a single vlan.
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Mitel MiVoice Business/MCD/3300 / Re: How many phones per vlan/subnet?
« on: October 28, 2018, 10:53:10 AM »
We have a class A address space so I could use 10.121.56.0/22 vlan/subnet and that should work. Even if I reserve 30 IP addresses for assigning statically, that still leaves nearly 1,000 addresses I can hand out via DHCP to phones.
So we will not run into any issues with excess broadcast traffic or quality of voice calls with 600 phones in the same vlan/subnet? I believe we will be using LLDP-MED so the phone and either desktop computer or printer daisy chained to the phone get the proper IP address and end up in the proper vlan/subnet.
The only other worry with a single vlan/subnet for all phones is could one or two bad phones flood this subnet with excess traffic and cause a problem?
So we will not run into any issues with excess broadcast traffic or quality of voice calls with 600 phones in the same vlan/subnet? I believe we will be using LLDP-MED so the phone and either desktop computer or printer daisy chained to the phone get the proper IP address and end up in the proper vlan/subnet.
The only other worry with a single vlan/subnet for all phones is could one or two bad phones flood this subnet with excess traffic and cause a problem?
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Mitel MiVoice Business/MCD/3300 / How many phones per vlan/subnet?
« on: October 27, 2018, 11:00:48 AM »
We are putting in a new Mitel phone system over the next six months. We are a K-12 school district with a single 190 acre campus. Each of our buildings are connected with underground fiber so we really have a single LAN. Our network is a hub and spoke design with a stack of Juniper EX4600 switches at the core providing layer2/3 and Juniper EX4200s at the edge. Our vlans are in a 1:1 relationship with our subnets. We will have about 600 Mitel phones with a mix of 3 models, 6920, 6930, and 6940. A Mitel 3300 series controller is also being installed.
I know I need to have separate vlans for voice and data. The question becomes should I have a single voice vlan/subnet that spans all of campus or several vlans/subnets, perhaps one per building, for voice traffic? Typically the reason for dividing up traffic is to limit broadcast traffic and allow the implementation of QoS. Not sure if Mitel phones generate a lot of broadcast traffic. If we go with a single vlan/subnet then QoS rules are all applied at layer 2. If we go with multiple vlans/subnets then we also have to apply QoS rules at layer 3. All routing on our network is done at the Juniper EX4600 core, none at the edge. All ethernet connections to phones are 1 gig with most phones being daisy chained to printers or desktops.
I know I need to have separate vlans for voice and data. The question becomes should I have a single voice vlan/subnet that spans all of campus or several vlans/subnets, perhaps one per building, for voice traffic? Typically the reason for dividing up traffic is to limit broadcast traffic and allow the implementation of QoS. Not sure if Mitel phones generate a lot of broadcast traffic. If we go with a single vlan/subnet then QoS rules are all applied at layer 2. If we go with multiple vlans/subnets then we also have to apply QoS rules at layer 3. All routing on our network is done at the Juniper EX4600 core, none at the edge. All ethernet connections to phones are 1 gig with most phones being daisy chained to printers or desktops.
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