I have an existing data network of consisting of a switch and SonicWall TZ200. I am adding an Avaya switch for their new phone system. I created 2 vlans on the new switch - one for their existing data network and a second for the phone subnet I can ping back and forth across the switch all day, but I can't get my phone system controller at to ping (default gateway of the router.) I have static route on switch 1 but still nothing. Switch is live in production - waiting to put phone system live when I can get this. Phone system has to access internet time server. Any help??

  • 1
    Is your Avaya switch a Layer 3 switch?
    – Ron Trunk
    Jan 28, 2015 at 18:40
  • Can you provide a basic diagram showing the nodes, and how you believe routing should be functioning between the phone system controller and Based on the information you provided, I would begin by ensuring the phone system controller is configured with a default gateway IP address capable of routing the traffic to the subnet.
    – devChadg
    Jan 28, 2015 at 19:12
  • 1
    And is routing enabled on it?
    – Ricky
    Jan 28, 2015 at 19:46
  • Did any answer help you? if so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer.
    – Ron Maupin
    Aug 11, 2017 at 3:25

1 Answer 1


I believe you mean to say that the router has an IP address, and this is the default gateway for clients in subnet The router has another default route pointing to somewhere in the Internet.

Think of a subnet as a house, and gateway as a door. To get into or out of the house you must use the door of that house, neighbor's door just won't do. The same way to get into or out of subnet your SonicWall must have an IP address on this range. This is the IP interface it will use to route traffic into and out of this subnet.

So basically you must create the Avaya VLAN in your SonicWall and give it an IP address This is the IP you use as default gateway for devices in the Avaya VLAN. Then you tag the link between the switch and the SonicWall to the Avaya VLAN, and traffic should flow correctly.

You should be able to do this configuration in a live production network without causing any disruption in the network services.

  • I like the gateway/door example ^^ Apr 30, 2015 at 15:07

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