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70 Chapter 2 Network configuration
212859-A
VLAN configuration rules
VLANs operate according to specific configuration rules. When creating VLANs,
consider the following rules that determine how the configured VLAN reacts in
any network topology:
• All ports that are involved in port mirroring must have memberships in the
same VLANs. If a port is configured for port mirroring, the port’s VLAN
membership cannot be changed.
• If a port is a trunk group member, all trunk members are added or deleted
from the VLAN.
• All ports involved in trunking and port mirroring must have the same VLAN
configuration. If a port is on a trunk with a mirroring port, the VLAN
configuration cannot be changed.
• Auto PVID can be activated by creating a VLAN and enabling Auto PVID for
it.
Independent VLANs (IVL)
You can configure a VLAN as an Independent VLAN (IVL). Each independent
VLAN maintains its own MAC Address table.
Independent VLANs can have duplicate MAC Addresses on different VLANs. In
Table 7, both VLANs use the duplicate MAC Address “A”.
For more information about configuring VLANs, see “VLAN Configuration
Menu screen” on page 120.
See also Appendix C, “Quick configuration for MultiLink Trunking,” on page 199
for configuration flowcharts that can help you use this feature.
Table 7 Independent VLAN (IVL) Forwarding Database Table Example
Port MAC Address VLAN
1 00081XXXA 1
2 00081XXXA 2