Vlan Tagging - Dell PowerConnect 8024 User Configuration Manual

Hide thumbs Also See for PowerConnect 8024:

Table of Contents

General — General ports can act like access or trunk ports or a hybrid of

VLAN membership rules that apply to a port are based on the switchport

mode configured for the port. Table 22-2 shows the behavior of the three

switchport modes.

Table 22-2. Switchport Mode Behavior

VLAN Membership

All VLANs that exist

in the system

As many as desired

When a port is in General mode, all VLAN features are configurable. When

ingress filtering is on, the frame is dropped if the port is not a member of the

VLAN identified by the VLAN ID in the tag. If ingress filtering is off, all

tagged frames are forwarded. The port decides whether to forward or drop the

frame when the port receives the frame.

VLAN Tagging

PowerConnect 8000/8100-series switches support IEEE 802.1Q tagging.

Ethernet frames on a tagged VLAN have a 4-byte VLAN tag in the header.

VLAN tagging is required when a VLAN spans multiple switches, which is

why trunk ports transmit and receive only tagged frames.

Tagging may be required when a single port supports multiple devices that are

members of different VLANs. For example, a single port might be connected

to an IP phone, a PC, and a printer (the PC and printer are connected via

ports on the IP phone). IP phones are typically configured to use a tagged

VLAN for voice traffic, while the PC and printers typically use the untagged

Trunk ports can receive tagged and untagged traffic. Untagged traffic is

tagged internally with the native VLAN. Native VLAN traffic received

untagged is transmitted untagged on a trunk port.

Configuring VLANs

Show Quick Links

Table of Contents