Spanning Tree Group 1: On (STP/PVST) VLANs: 1 10 20 100 220 Current Root: Path-Cost Port Hello MaxAge FwdDel Aging 8000 00:03:b2:52:21:00 5 2 2 20 15 300 Parameters: Priority Hello MaxAge FwdDel Aging 32768 2 20 15 300 Port Priority Cost State Designated Bridge Des Port ------ -------- ---- ---------- ---------------------- -------- 1 128 1! BLOCKING 8064-00:19:aa:cb:71:80 800b 2 128 5! FORWARDING 8000-00:03:b2:52:21:00 8002 3 128 0! DISABLED 4 128 0! DISABLED 5 128 0! DISABLED 6 128 0! DISABLED 7 128 0! DISABLED 8 128 0! DISABLED 9 128 0! DISABLED 10 128 0! DISABLED 11 128 0! DISABLED 12 128 0! DISABLED 13 128 0! DISABLED 14 128 0! DISABLED 15 128 0! DISABLED 16 128 0! DISABLED ! = Automatic path cost. Number of topology changes - 179 Time since last topology change - 26 days 23 hours 9 minutes 18 seconds |
Parameter | Description |
---|---|
Priority (bridge) | Controls which bridge on the network becomes the STP root bridge. |
Hello | Specifies, in seconds, how often the root bridge transmits a configuration bridge protocol data unit (BPDU). Any bridge that is not the root bridge uses the root bridge hello value. |
MaxAge | Specifies, in seconds, the maximum time the bridge waits without receiving a configuration bridge protocol data unit before it re-configures the STP network. |
FwdDel | Specifies, in seconds, the time that a bridge port has to wait before it changes from learning state to forwarding state. |
Aging | Specifies, in seconds, the time the bridge waits without receiving a packet from a station before removing the station from the forwarding database. |
priority (port) | Helps determine which bridge port becomes the designated port. In a network topology that has multiple bridge ports connected to a single segment, the port with the lowest port priority becomes the designated port for the segment. |
Cost | Helps determine the designated port for a segment. As a rule, the faster the port, the lower the path cost. A setting of 0 indicates that the cost is set to the appropriate default after the link speed has been auto negotiated. |
State | The state field shows the current state of the port. Values: ![]() ![]() ![]() ![]() ![]() |
Designated Bridge | The designated bridge resides closest to the root bridge and is responsible for forwarding packets from LAN towards the root bridge. This bridge displays as a character string starting with the bridge priority (1 through 65535) followed by a hyphen and six-byte Alteon MAC address. |
Designated port | Identifies a physical port. This is a number that is the numerical sum of the bridge priority and the actual physical port number. For example, a physical port number 4 with bridge priority 32768 displays as 32678+4=32772. |