Allied Telesis AT-IFS802SP manual 802.1Q Configuration

AT-IFS802SP-80 User Manual 53

802.1Q Configuration

• Pull down the selection item and focus on 802.1Q then press to set the VLAN Operation Mode in 802.1Q mode.

•Enable GVRP Protocol: GVRP (GARP VLAN Registration Protocol) is a protocol that facilitates control of virtual local area networks (VLANs) within a larger network. GVRP conforms to the IEEE 802.1Q specification, which defines a method of tagging frames with VLAN configuration data. This allows network devices to dynamically exchange VLAN configuration information with other devices. For example, having enabled GVRP on two switches, they are able to automatically exchange the information of their VLAN database.

Therefore, the user doesn’t need to manually configure whether the link is trunk or hybrid, the packets belonging to the same VLAN can communicate across switches. Tick this checkbox to enable GVRP protocol.This checkbox is available while the VLAN Operation Mode is in 802.1Q mode.

•Management VLAN ID: Only when the VLAN members, whose Untagged VID (PVID) equals to the value in this column, will have the permission to access the switch.The default value is ‘0’ that means this limit is not enabled (all members in different VLANs can access this switch).

•Select the port you want to configure.

•Link Type:There are 3 types of link type.

>Access Link: A segment which provides the link path for one or more stations to the VLAN-aware device.An Access Port (untagged port), connected to the access link, has an untagged VID (also called PVID). After an untagged frame gets into the access port, the switch will insert a four-byte tag in the frame. The contents of the last 12-bit of the tag is untagged VID.When this frame is sent out through any of the access port of the same PVID, the switch will remove the tag from the frame to recover it to what it was.Those ports of the same untagged VID are regarded as the same VLAN group members.

[note]

Because the access port doesn’t have an understanding of tagged frame, the column field of Tagged VID is not available.

>Trunk Link:A segment which provides the link path for one or moreVLAN-aware devices (switches). A Trunk Port, connected to the trunk link, has an understanding of tagged frame, which is used for the communication amongVLANs across switches.Which frames of the specified VIDs will be forwarded depends on the values filled in the Tagged VID column field. Please insert a comma between two VIDs.

[note]

1.A trunk port doesn’t insert tag into an untagged frame, and therefore the untagged VID column field is not available.

2.It’s not necessary to type ‘1’ in the tagged VID.The trunk port will forward the frames of VLAN 1.

3.The trunk port has to be connected to a trunk/hybrid port of the other switch. Both the tagged VID of the two ports have to be the same.