Allied Telesis AT-S63 - Manual (Page 677)

AT-S63 Management Software Menus Interface User’s Guide
Section VI: Virtual LANs 677
ˆ If the packet’s destination MAC address is in the MAC address table
but the port where the address was learned is not one of the VLAN’s
egress ports, the switch discards the packet.
VLANs That
Span Switches
A MAC address-based VLAN can span switches, but it does require a
large degree of management in terms of entering the MAC addresses.
Basically, in order for nodes connected to different switches to be
considered as members of the same MAC address-based VLAN, the MAC
addresses of the nodes must be replicated on all of the switches that
comprise the VLAN.
Figure 230 illustrates an example of a MAC address-based VLAN that
spans two AT-9400 Series switches. The VLAN consists of three nodes on
each switch. Table 30 on page 678 lists the details of the VLAN on the
switches. Note that each VLAN contains the complete set of MAC
addresses of all VLAN nodes along with the appropriate egress ports on
the switches.
Figure 230. Example of a MAC Address-based VLAN Spanning Switches
2
3
4
5
6
7 9 19 1 21 23 17 15 11 13
8 10 12 14 18 20 22 24 16
2
3
4
5
6
7 9 19 1 21 23 17 15 11 13
8 10 12 14 18 20 22 24 16
AT-9400 Series
Switch (A)
AT-9400 Series
Switch (B)
MAC Addresses:
Address_4
Address_5
Address_6
MAC Addresses:
Address_1
Address_2
Address_3