Allied Telesis AT-S20 - Manual (Page 67)

AT-S20 User’s Guide
5-3
When a port is a member of a port-based VLAN, it is internally
assigned a unique Port VLAN ID or PVID. This PVID is added as a VLAN
tag as frames enter this port. This PVID is used to route the frame
through the switch and through 802.1Q-based switches. This
enables legacy (non-802.1Q compliant) devices connected to the
switch to take advantage of the VLAN capabilities of the switch.
Note
The manager is a legacy device. It cannot interpret VLAN tags. The
management agent responds only to pings from any device that is
located within the same VLAN, defined by the management port’s
PVID.
Figure 5-3 shows how VLANs are used across uplink ports and
between two different manufacturer’s equipment. The switches have
the following VLAN configurations:
AT-3714FXL Configuration
❑ Port 1 is a member of the “Default VLAN”
❑ Ports 2 and 14 are members of VLAN #2
The AT-3714FXL is configured as follows:
❑ The AT-3714FXL will have a VLAN named “Default VLAN”. Port
1 will be both tagged and a port-based member of “Default
VLAN” with a PVID and a VLAN ID of 1. Port 15 is added as a tag
member so that “Default VLAN” will have access to the uplink
between switches.
❑ The AT-3714FXL will have a VLAN named “VLAN 2”. Ports 2 and
14 will be both a tagged and a port-based member of VLAN #2
with a PVID and a VLAN ID of 2. Port 15 is added as a tag
member so that “VLAN 2” will have access to the uplink
between switches.
❑ The AT-3714FXL will have a VLAN named “Uplink”. Port 15 will
be both tagged and a port-based member of VLAN “Uplink”
with a PVID and a VLAN ID of 3. See Figure 5-3.
AT-8518 Configuration
❑ Ports 1 and 3 are members of the “Default VLAN”
❑ Ports 2 is a member of VLAN #2