HP VLAN Tagging Terminology Differences
VLAN ID
Both devices use 802.1Q standard VLAN id's. Our older HP Procurve switches, such as the HP Procurve 4000m, it could only support a maximum of 8 VLANs. To enable, you can easily telnet into the device and turn on VLAN Support from the menu, (it does require a reboot). You can still only setup 256 VLANs on a single switch (or router), however, a centrally located device, can pass the tags of up to 4096 VLAN ids. VLAN 1 is the default administrative VLAN, this is set as "Untagged" on all ports out of the box.
VLAN Names
HP Procurve switches allow up to 32 characters for the description, when you're looking at it in the menu view however, it will be truncated to 12 characters. Typically, when I name them, I'll either call them the building or location they are located at, plus the number ID, e.g. building12. It's good to have both pieces of physical and virtual information to save yourself some confusion.
VLAN Modes
HP Procurve switches has three VLAN modes; Untagged, Tagged, and No. Untagged mode is the equivalent of Access Mode in Cisco, which is used for end nodes, or devices not passing VLAN traffic forward (client ports; desktops, printers, etc.). Tagged mode is the same as Trunk mode in Cisco, which is used for ports that connect devices and are passing traffic forward (uplink or downlink ports on a switch). No mode means the physical port is not a part of the VLAN.
Trunk
The term Trunk means two different things when dealing with HP or Cisco equipment. HP Procurve switches use trunk to define a group of physical Ethernet ports, Cisco calls this channel-group. Cisco uses VLAN trunk to define what HP Procurve calls a Tagged port.