Administrator's Guide v4.1.1 Manual

‐ Any tagged frames coming with a VLAN tag equal to the configured native VLAN are
processed.
‐ For ingress and egress, non-native VLAN tagged frames are processed according to the
allowed VLAN user specifications. This is called trunk mode.
NOTE
Ingress VLAN filtering is enabled by default on all Layer 2 interfaces. This ensures that VLANs are
filtered on the incoming port (depending on the user configuration).
The following illustrates the frame-processing logic for an incoming frame.
FIGURE 43 Ingress VLAN filtering
There are important facts you should know about Ingress VLAN filtering:
• Ingress VLAN filtering is based on port VLAN membership.
• Port VLAN membership is configured through the Network OS CLI.
• Dynamic VLAN registration is not supported.
• The Brocade VDX hardware does VLAN filtering at both the ingress and egress ports.
Configuring 802.1Q VLANs
356 Network OS Administrator’s Guide
53-1003225-04