Planet Networking & Communication SGSD-1022, Руководство пользователя, Страница: 164 / 688

User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
164
- Discarding Port receives STA configuration messages, but does not forward
packets.
- Learning Port has transmitted configuration messages for an interval set
by the Forward Delay parameter without receiving contradictory
information. Port address table is cleared, and the port begins
learning addresses.
- Forwarding Port forwards packets, and continues learning addresses.
•
Forward Transitions The number of times this port has transitioned from the Learning state to the
Forwarding state.
•
Designated Cost
The cost for a packet to travel from this port to the root in the current Spanning
Tree configuration.
The slower the media, the higher the cost.
•
Designated Bridge The bridge priority and MAC address of the device through which this port must
communicate to reach the root of the Spanning Tree.
•
Designated Port
The port priority and number of the port on the designated bridging device
through which this switch must communicate with the root of the Spanning Tree.
•
Oper Path Cost
The contribution of this port to the path cost of paths towards the spanning tree
root which include this port.
•
Oper Link Type The operational point-to-point status of the LAN segment attached to this
interface. This parameter is determined by manual configuration or by
auto-detection, as described for Admin Link Type in STA Port Configuration.
•
Oper Edge Port This parameter is initialized to the setting for Admin Edge Port in STA Port
Configuration (i.e., true or false), but will be set to false if a BPDU is received,
indicating that another bridge is attached to this port.
•
Port Role
Roles are assigned according to whether the port is part of the active topology
connecting the bridge to the root bridge (i.e., root port), connecting a LAN
through the bridge to the root bridge (i.e., designated port), or is the MSTI
regional root (i.e., master port); or is an alternate or backup port that may
provide connectivity if other bridges, bridge ports, or LANs fail or are removed.
The role is set to disabled (i.e., disabled port) if a port has no role within the
spanning tree.
•
Trunk Member
Indicates if a port is a member of a trunk. (STA Port Information only)