Siemens SCALANCE X-400 - Page 218

Configuration using Web Based Management and Command Line Interface
4.5 The Switch menu
SCALANCE X-300 / X-400
218 Configuration Manual, 10/2014, C79000-G8976-C187-22
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State
The "State" column shows the current status of the port.
The following statuses are possible:
– disabled
The port only receives and is not involved in STP, MSTP and RSTP.
– blocking
The port receives BPDUs.
– listening
The port receives and sends BPDUs. The port is involved in the spanning tree
algorithm.
– learning
Stage prior to the forwarding status, the port is actively learning the topology; in other
words, the node addresses.
– forwarding
Following the reconfiguration time, the port is active again in the network; it receives
and forwards data frames.
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Role
The "Role" column specifies which role the port adopts:
The following values are possible:
– Root
The port has the lowest path costs from the device itself to the regional root bridge of
the MST instance.
– Designated
Via this port, a connected network segment reaches the MSTI regional root bridge
with minimum path costs.
– Alternate
The port is blocked and provides an alternative path to the MSTI regional root bridge.
– Backup
The port is blocked and provides an alternative path to a collision domain that is
already connected via a different port.