Cisco 500 Series Administration Manual page 311

15
STEP 6
309
- Backup—The interface provides a backup path to the designated port
path toward the Spanning Tree leaves. Backup ports occur when two
ports are connected in a loop by a point-to-point link. Backup ports also
occur when a LAN has two or more established connections to a shared
segment.
- Disabled—The interface does not participate in the Spanning Tree.
Boundary
- —The port on this instance is a boundary port. It inherits its
state from instance 0 and can be viewed on the STP Interface Settings
page.
• Mode—Displays the current interface Spanning Tree mode.
- If the link partner is using MSTP or RSTP, the displayed port mode is
RSTP.
- If the link partner is using STP, the displayed port mode is STP.
• Type—Displays the MST type of the port.
- Boundary—A Boundary port attaches MST bridges to a LAN in a remote
region. If the port is a boundary port, it also indicates whether the device
on the other side of the link is working in RSTP or STP mode.
- Internal—The port is an internal port.
• Designated Bridge ID—Displays the ID number of the bridge that connects
the link or shared LAN to the root.
• Designated Port ID—Displays the Port ID number on the designated bridge
that connects the link or the shared LAN to the root.
• Designated Cost—Displays the cost of the port participating in the STP
topology. Ports with a lower cost are less likely to be blocked if STP detects
loops.
• Remain Hops—Displays the hops remaining to the next destination.
• Forward Transitions—Displays the number of times the port has changed
from the Forwarding state to the Blocking state.
Click Apply. The Running Configuration file is updated.
Cisco 500 Series Managed Switch Administration Guide
Spanning Tree
MSTP Interface Settings