NETWORK BEST PRACTICES - MERAKI
SimpleVoip recommends that your network be setup with a separate voice vlan and Qos policy for SimpleVoip phones and network traffic. The goal of this post is to give you an overview of how the Best Practices are implemented in a Cisco Meraki Network environment.
First let’s take care of the Voice Vlan part.
1. Go to Security Appliance | addressing and vlans
2. Add a local Vlan | name it VOICE | give it a unique Vlan id, I choose your Internal IP address scheme | Configure the MX gateway IP,
Once the Vlan has been created, configure the Traffic shaping and Qos policy.
Voice Layer 3 QoS Configuration:
1. Go to Security Appliance | Traffic Shaping
2. Configure a WAN speed as provided by your provider, Make sure to choose a few Mbps lower than you are guaranteed.
3. Set a per client limit and configure the following traffic shaping rules.Leave a per-client download limit so you don’t over saturate your inbound download. Define your traffic shaping rules to allow the Voice Network IP block and all VoIP traffic. Make sure the Priority is set to High and DSCF is set to 46 (EF)
If you have a Meraki Managed Switch her is how we configure the layer 2 aspect:
1. Go To Switch | Switch Ports | Highlight all ports and edit
2. Highlight all ports except for the uplink and click edit
3. Set the switchport type to access, set the voice vlan to 2.
note: The above will make the switch tell phones about the voice vlan through CDP and or LLDP which automatically puts them in the proper network.
Layer 2 QoS:
1. Head over to Switch | Switch Settings
2. Configure the Other vlan priority to be reset to Class 0, Then configure your Voice vlan priority to be DSCP
The above says trust the QoS markings from VLAN 2 ( the phones) and it says don’t trust PC QoS markings
Now your prioritization will work at layer 2 all the way up to when it leaves your MX appliance the it’s at the mercy of the WAN provider.
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