Allied Telesis AT-S79 - Manual (Page 79)

AT-S79 Management Software User’s Guide
Section I: Using the Menus Interface 79
The table below lists the port assignments for the Sales, Engineering, and
Production VLANs on the switches:
Note the following concerning the example:
ˆ Sales VLAN - This VLAN spans both switches. It has a VID value of 2
and consists of six untagged ports on the top switch and five untagged
ports on the bottom switch. The two parts of the VLAN are connected
by a direct link from port 4 on the top switch to port 3 on the bottom
switch. This direct link allows the two parts of the Sales VLAN to
function as one logical LAN segment.
Port 6 on the top switch connects to the router. This port allows the
Sales VLAN to exchange Ethernet frames with the other VLANs and to
access the WAN.
ˆ Engineering VLAN - The workstations of this VLAN are connected to
ports 9 to 13 on the top switch and ports 16, 18 to 20, and 22 on the
bottom switch. Because this VLAN spans multiple switches, it needs a
direct connection between its various parts to provide a
communications path. This is provided in the example with a direct
connection from port 10 on the top switch to port 19 on the bottom
switch.
This VLAN uses port 12 on the top switch as a connection to the router
and the WAN.
ˆ Production VLAN - This is the final VLAN in the example. It has the
VLAN of 4 and its ports have been assigned the PVID also of 4. This
VLAN does not require a direct connection to the bottom switch
because its nodes are connected only to the top switch. However, it
uses port 20 as a connection to the router.
Sales VLAN
(VID 2)
Engineering VLAN
(VID 3)
Production VLAN
(VID 4)
AT-GS950/24
Switch (top) Ports 1 - 6
(PVID 2) Ports 9 - 13
(PVID 3) Ports 17, 19 - 21
(PVID 4)
AT-GS950/24
Switch (bottom) Ports 2 - 4, 6, 8
(PVID 2) Ports 16, 18-20, 22
(PVID 3) none