User`s guide

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locking A port that would cause a switching loop, no user data is sent or
received but it may go into forwarding mode if the other links in use
were to fail and the spanning tree algorithm determines the port may
transition to the forwarding state. BPDU data is still received in blocking
state.
The RSTP port states are
Learning
The port does not yet forward frames but it does learn source
addresses from frames received and adds them to the MAC address
table. The port processes BPDU’s.
Forwarding The port receiving and sending data, normal operation. STP still
monitors incoming BPDU’s that would indicate it should return to the
blocking state to prevent a loop.
Discarding A port that would cause a switching loop, no user data is sent or
received but it may go into forwarding mode if the other links in use
were to fail and the spanning tree algorithm determines the port may
transition to the forwarding state. BPDU data is still received in blocking
state.
Configuration - Interfaces > Ethernet > ETH n > VLANs
VLANs (Virtual LANs) facilitate splitting a single physical LAN into separate Virtual LANs. This
is useful for security reasons, and will also help cut down on broadcast traffic on the LAN.
Enable VLAN support on Ethernet interfaces
Enables VLAN support on the Ethernet interface.
VLAN ID
The ID of the Virtual LAN. This parameter is used in the TCP header to identify the
destination VLAN for the packet.
Ethernet Interface
The Ethernet port that will tag the outgoing packets. Packets sent from this interface will
have VLAN tagging applied.
IP Address
The destination IP address. This parameter is optional. If configured, only packets destined
for this IP address will have VLAN tagging applied.
Mask
The destination IP subnet mask. This parameter is optional. If configured, only packets
destined for this IP subnet mask will have VLAN tagging applied.
Source IP Address
The source IP address. This parameter is optional. If configured, only packets from this IP
address will have VLAN tagging applied.