Ericsson ECN330, User Manual

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Configuring the ECN330-switch
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6.10.7 Configuring Interface Settings for MSTP
The STA interface settings for an MST Instance can be configured using the
MSTP Port Configuration and MSTP Trunk Configuration pages.
Field Attributes
The following attributes are read-only and cannot be changed:
• STA State – Displays current state of this port within the Spanning Tree.
(See Displaying Interface Settings on page 243 for additional
information.)
• 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.
• Trunk – Indicates if a port is a member of a trunk.
(STA Port Configuration only)
The following interface attributes can be configured:
• MST Instance ID – Instance identifier to configure. (Range: 0-4094;
Default: 0)
• Priority – Defines the priority used for this port in the Spanning Tree
Protocol. If the path cost for all ports on an ECN330-switch are the
same, the port with the highest priority (lowest value) will be configured
as an active link in the Spanning Tree. This makes a port with higher
priority less likely to be blocked if the Spanning Tree Protocol is
detecting network loops. Where more than one port is assigned the
highest priority, the port with lowest numeric identifier will be enabled.
• Default: 128
• Range: 0-240, in steps of 16