vlan.tags.txt

UNTAGGED is a regular ethernet data packet

TAGGED is an ethernet data packet with an addition which contains a VLAN ID

A PVID (Port VLAN ID) is an UNTAGGED packet that enters a switch port , the PVID is attched to the untagged packet and forwarded to a VLAN specified by the ID part of the PVID

Tagged traffic: Is used between tag-aware units (Switches and AP's), so they can see what VLAN the traffic belongs to. In short, if you use one cable between two switches, you will have to tag traffic. You can have one untagged all the way around in the network, but the next VLAN's have to be tagged.

Best practice: 
VLAN 1 untagged in all of the network, and the rest is tagged. When you need to extract one VLAN to a specific port, you will need to assign the PVID to the correct VLAN.

[customer name - 1 character]
-
[region - 1 character - N = "North America", 
   E = "EMEA", A= "ASPAC", etc.]
[state or country - 2 characters]
[city - 3 characters]
[site number - 2 characters (in case 
   there is more than one site in the same city)]
-
[device function - 2 characters - WR = "WAN Router", 
   "CR" = "Core Router", "WA" = WAP, 
   AS = "Access Switch", IR = Internet Router, etc.]
[device number - 2 characters]
- 
[criticality - 1 character - H = "High", 
   M = "Medium", L = "Low"]
-
[device model - 7206, 3845, 2821, etc]

e.g.

GE's network with a site in Buffalo, NY with a 7206 as a critical WAN router the device name would be "G-NNYBUF01-WR01-H-7206". 
Or for Cisco's network with a 3845 in Tokyo serving as a low priority voice gateway: "C-AJPTYO01-VG01-L-3845"

F# = Floor
R# = Rack
So, if the aforementioned Cisco router in Tokyo was located in Building 1, Floor 10, Rack C, the name would be extended to: "C-AJPTYO01-VG01-L-3845-B1F10RC".

CS01-H-GS950-F2RA
CS02-H-GS950-F2RA
FWL01-H-NSA2400-F2RA
CR01-H-AT770-F2RA

AS01-M-SG5428-F0RA
AS01-M-SG5428-F1RA
AS01-M-SG5428-F2RB
AS02-M-SG5428-F2RB

Building No, Floor, Room, Rack, Server number

135-2-32-A1-20

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S2D-3110-53