AT-9000 Switch Command Line User’s Guide
Section VII: Virtual LANs 635
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
To create a MAC address-based VLAN that spans switches, you must
replicate the MAC addresses of the VLAN nodes on all the switches where
the VLAN exists. The same MAC address-based VLAN on different
switches must have the same list of MAC addresses.
Figure 108 illustrates an example of a MAC address-based VLAN that
spans two AT-9000/28SP Switches. The VLAN consists of three nodes on
each switch. Table 64 on page 636 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 108. Example of a MAC Address-based VLAN that Spans Switches
2
3
4
5
6
79 1912123171511
13
8 10 12 14 18 20 22 2416
25 26
27 28
2
3
4
5
6
79 1912123171511
13
8 10 12 14 18 20 22 2416
25 26
27 28
AT-9000/28SP Switch (A)
AT-9000/28SP Switch (B)
MAC Addresses:
Address_4
Address_5
Address_6
MAC Addresses:
Address_1
Address_2
Address_3
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