Linksys SGE2000 Cisco Small Business SFE/SGE2xxx Series Managed Switches Admin - Page 278
Forwarding, Boundary Port, Master Port, Internal, Designated, Alternate, Backup, Disabled, Classic STP
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Configuring Spanning Tree Defining Multiple Spanning Tree 10 - Forwarding - Indicates that the port is in Forwarding mode. The port can forward traffic and learn new MAC addresses. • Type - Indicates if the port is a point-to-point port, or a port connected to a hub. The possible field values are: - Boundary Port - Indicates the port is a boundary port. A Boundary port attaches MST bridges to LAN in an outlying 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 - Master Port - Indicates the port is a master port. A Master port provides connectivity from a MSTP region to the outlying CIST root. - Internal - Indicates the port is an internal port. • Role - Indicates the port role assigned by the STP algorithm in order to provide to STP paths. The possible field values are: - Root - Provides the lowest cost path to forward packets to root device. - Designated - Indicates the port or LAG via which the designated device is attached to the LAN. - Alternate - Provides an alternate path to the root device 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. - Disabled - Indicates the port is not participating in the Spanning Tree. • Mode - Indicates the current Spanning Tree mode. The possible field values are: - Classic STP - Indicates that Classic STP is enabled on the port. - Rapid STP - Indicates that Rapid STP is enabled on the port. - MSTP - Indicates that MSTP is enabled on the port. • Interface Priority - Defines the interface priority for specified instance. The default value is 128. • Path Cost - Indicates the port contribution to the Spanning Tree instance. The range is 1-200,000,000. Cisco Small Business SFE/SGE Managed Switches Administration Guide 269