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324 Rockwell Automation Publication 1783-UM007I-EN-P - December 2017
Chapter 4 Monitor the Switch
Port Diagnostics The Port Diagnostics feature in the Logix Designer application lets you view
the status of the link performance:
•
View octet and packet counters
•
View collisions on the link
•
View errors on the link
You can also reset and clear all status counters.
In the navigation pane, click Port Status, and then click the button in the Port
Diagnostics column for the corresponding port.
Table 125 - MST Tab Fields
Field Description
Vlans Mapped The VLANs mapped to the selected instance.
Root
Priority The priority indicator.
Address The MAC ID of the port.
Cost The root path cost.
Port The root port ID.
Rem hops The number of hops remaining of the maximum hop count after each downstream switch decrements the hop count.
Bridge
Priority The priority indicator.
Address The MAC ID of the port.
Port Statistics
Interface The interface type and number of the port.
Role The current 802.1w role:
• Boun—Boundary
• Desg—Designated
• Root
• Altn—Alternate
• Back—Backup
Sts Spanning-tree states:
• BLK—Blocked: The port is still sending and listening to BPDU packets but is not forwarding traffic.
• DIS—Disabled: The port is not sending or listening to BPDU packets and is not forwarding traffic.
• FWD—Forwarding: The port is sending and listening to BPDU packets and forwarding traffic.
• LBK—Loopback: The port recieves its own BPDU packet back.
• LIS—Listening: The port spanning tree initially starts to listen for BPDU packets for the root bridge.
• LRN—Learning: The port sets the proposal bit on the BPDU packets it sends out.
Cost The path cost of the port.
Priority The port priority.
Type Link type of the port:
• P2p—Point to point: The interface is a point-to-point link.
• Shr—Shared: The interface is a shared medium.