Cisco SPS208G User Manual

Spanning Tree
RSTP Port Settings
SPS208G/SPS224G4/SPS2024 Service Provider Switches User Guide 196
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The RSTP Port Parameters area contains the following fields:
• Interface — Define the port or LAG of this RSTP configuration. The possible
field values are:
- Unit No. — Indicates the stacking member on which this RSTP
configuration is defined.
- Port — Indicates the port on which this RSTP configuration is defined.
- LAG — Indicates the LAG on which this RSTP configuration is defined.
• Role — Indicates the port role assigned by the STP algorithm in order to
provide STP paths. The possible field values are:
- Root — Provides the lowest cost path to forward packets to root switch.
- Designated — Indicates that the port or LAG via which the designated
switch is attached to the LAN.
- Alternate — Provides an alternate path to the root switch from the root
interface.
- Backup — Provides a backup path to the designated port path toward
the Spanning Tree leaves. Backup ports occur only 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 connections connected to a shared
segment.
- Disable — Indicates the port is not participating in the Spanning Tree.
• Mode — Indicates the current Spanning Tree mode. The possible field
values are:
- STP — Indicates that Classic STP is detected on the interface.
- Rapid STP — Indicates that Rapid STP is detected on the interface.
- Multiple STP — Indicates that Multiple STP is detected on the interface.
• Fast Link — Indicates if Fast Link is enabled or disabled for the port or LAG.
If Fast Link is enabled for a port, the port is automatically placed in the
forwarding state. The possible field values are:
- Enable — Fast Link is enabled.
- Disable — Fast Link is disabled.
- Auto — Fast Link mode is enabled a few seconds after the interface
becomes active.

Cisco SPS208G Specifications

General

Brand	Cisco
Model	SPS208G
Category	Switch
Language	English