Brocade MLX Series and NetIron Family Configuration Guide
Brocade MLX Series and NetIron Family Configuration Guide
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documentation@brocade.com


VLANs : Transparent VLAN flooding

Transparent VLAN flooding
You can configure your Brocade device for transparent VLAN flooding. This feature allows packets to be forwarded without any form of CPU intervention including MAC learning and MAC destination lookups.
NOTE: Because this feature floods all VLAN packets in hardware, it is not expected to work in conjunction with routing functions such as establishing routing protocol neighborship and L3 forwarding even when the VLAN has a VE configured.
This implementation of Transparent VLAN Flooding has the following attributes:
This feature is particularly useful in situations where MAC learning is not required for traffic forwarding. Examples of where this feature is useful include:
NOTE: Packets that arrive on an interface with the same destination MAC address as the interface are forwarded in hardware just like packets with other destination addresses.
To enable VLAN transparent forwarding on VLAN 10, use the following command.
Brocade(config)# vlan 10
Brocade(config-vlan-10)# transparent-hw-flooding
 
Syntax:
Input Layer 3 ACLs need to be applied to a virtual routing interface on the VLAN and should not be attached to a port directly. Note that the ACL would apply to all ports in the VLAN by default. If this is not desired, a subset of ports in the VLAN may be specified, as in the following configuration.
Brocade(config)# interface ve 1
Brocade(config-vif-1)# ip access-group 101 in ethernet 1/1
Brocade(config-vif-1)# ip access-group ve-traffic
 
NOTE: The above example binds the ACL 101 to the virtual routing interface and configures the virtual routing interface to apply the input ACL 101 for switched and routed traffic received on port 1/1.

VLANs : Transparent VLAN flooding