KTI Networks KGS-510F-B, User Manual

Page: 58 / 66

-58-
RSTP Port Status Description
Port/Group Port number
VLAN Id The associated VLAN to which the RSTP port belongs (PVID)
Path Cost The path cost of the RSTP port
Edge Port Is the port an edge port?
P2p Port Yes - The port operates in full duplex.
Protocol The protocol version configured for the port - RSTP or STP
Port State Forwarding - A port receiving and sending data, normal operation. STP
still monitors incoming BPDUs that would indicate it should return to the
blocking state to prevent a loop.
Blocking - 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.
Listening - The switch processes BPDUs and awaits possible new
information that would cause it to return to the blocking state.
Learning - While the port does not yet forward frames (packets) it does
learn source addresses from frames received and adds them to the filtering
database (switching database)
Non-STP - RSTP is disabled.
The above status example shows three STP operate in three different VLANs as follows:
VLAN 1 members: P1, P2, P3, P4, P5, P6
VLAN 2 members: P2, P3
VLAN 3 members: P5, P6
P2 PVID = VLAN 2
P3 PVID = VLAN 2
P5 PVID = VLAN 3
P6 PVID = VLAN 3
P2 and P3 connect to same switch as an STP redundant link associated to VLAN 2.
P5 and P6 connect to another switch as an STP redundant link associated to VLAN 3.
The switch supports MSTP (Multiple STP) over multiple VLANs. Each VLAN has individual STP
mechanism operating independently.