Indicates the VLAN-based forwarding policy for the broadcast packets.
Options:
1. forward(1) -indicates that the broadcast packets are transparently transmitted.
2. discard(2) -indicates that the broadcast packets are discarded.
During the creation of a VLAN, if this leaf is not specified, forward(1)
is adopted by default. You can perform the set operation on this leaf
to modify the VLAN-based forwarding policy for the broadcast packets.
The VLAN-based forwarding policy for the broadcast packets can also be
configured in hwPolicyBroadcast of hwVlanSrvProfTable. If a VLAN service
profile is bound to the VLAN, the configuration in the VLAN service profile takes effect.