Configuring the ECN330-switch
248 1553-KDU 137 365 Uen D 2006-06-16
• 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:
• Spanning Tree – Enables/disables STA on this interface. (Default:
Enabled).
• Priority – Defines the priority used for this port in the Spanning Tree
Algorithm. 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
• Admin Path Cost – This parameter is used by the STA to determine the
best path between devices. Therefore, lower values should be assigned
to ports attached to faster media, and higher values assigned to ports
with slower media. (Path cost takes precedence over port priority.) Note
that when the Path Cost Method is set to short (page 241), the
maximum path cost is 65,535.
By default, the system automatically detects the speed and duplex
mode used on each port, and configures the path cost according to the
values shown below. Path cost “0” is used to indicate auto-configuration
mode.
• Range –
Ethernet: 200,000-20,000,000
Fast Ethernet: 20,000-2,000,000
Gigabit Ethernet: 2,000-200,000
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