I know there are a plethora of posts going over VLAN's - I just want to confirm I am doing everything right for my situation before I start configuring (I don't have a test environment to mimic live so it is difficult to test).
Dell 6248p - primary layer 3 device.
5x Netgear GS724TP
Currently the setup is pretty straight forward - the Netgears are all on VLAN2, which is set by the Dell...the ports linking the Netgear to the Dell are simply assigned to only VLAN2 as untagged.
What I am looking at into doing now is adding a Voice VLAN into the mix and breaking a few of the switches off onto another VLAN. We are in an older building, so the line is currently being shared by both an Avaya IP Office VOIP system as well as the data, the phones are acting as a switch (Avaya 5602 and 5610's mainly).
The part I am a bit fuzzy on is for two parts:
the first is regarding the link going from the Netgear to the Dell. Since the link port is going to be handling two VLAN's (at least one of them tagged) I know I need to change the Link Port from Access...but should I be changing it to General or Trunk?
the second goes along with the answer to the first - if using a Trunk port I then need to have all traffic Tagged, the voice channels will already be tagged by the phone but for the data VLAN, which is currently untagged, do I need to Tag is prior to it getting to the Dell (that being configuring the VLAN on the Netgear) or can it be tagged by the Dell?
The best case scenario for us is to keep as much, if not all, of the configuration changes on the Dell. So if a Trunk port requires the traffic to be tagged before getting to the Dell, is it possible to use a 'General' port and keep the traffic untagged or tag it at the Dell?
I have IP Helper portion working now, leaving the below portion in but it is now irrelevant:
The second part of the question is regarding the IP Helper...i have the newer Firmware for the Dell which gets rid of DHCP relay and changes to IP Helper. The part I am not sure on is if I can just use the following command which Dell CLI manual indicates "To relay DHCP packets received on any interface to DHCP server"
DHCP server location setup:
ip helper-address x.x.x.x dhcp
This appears to indicate I can do this one global command (while not under a VLAN, just at the config #) to enable IP Helper for the entire device...and realistically once that is set I am done (at least for DHCP relay).
Am I missing anything?