Cisco 350 Series Administration Manual page 336

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• Path Cost—Enter the port contribution to the root path cost in the User Defined
textbox or select Use Default to use the default value.
• Port State—Displays the MSTP status of the specific port on a specific MST instance.
The parameters are defined as:
- Disabled—STP is currently disabled.
- Discarding—The port on this instance is currently discarding/blocked, and cannot
forward traffic (with the exception of BPDU data) or learn MAC addresses.
- Listening—The port on this instance is in Listening mode. The port cannot forward
traffic, and cannot learn MAC addresses.
- Learning—The port on this instance is in Learning mode. The port cannot forward
traffic, but it can learn new MAC addresses.
- Forwarding—The port on this instance is in Forwarding mode. The port can
forward traffic and learn new MAC addresses.
- Boundary—The port on this instance is a boundary port. It inherits its state from
instance 0 and can be viewed on the
• Port Role—Displays the port or LAG role, per port or LAG per instance, assigned by
the MSTP algorithm to provide STP paths:
- Root—Forwarding packets through this interface provides the lowest cost path for
forwarding packets to the root device.
- Designated Port—The interface through which the bridge is connected to the LAN,
which provides the lowest root path cost from the LAN to the Root Bridge for the
MST instance.
- Alternate—The interface provides an alternate path to the Root Bridge from the root
port.
- 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
• Mode—Displays the current interface Spanning Tree mode.
- If the link partner is using MSTP or RSTP, the displayed port mode is RSTP.
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
STP Interface Settings page.
STP Interface Settings page.
Spanning Tree
MSTP Interface Settings