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NXA-ENET24 - Software Management Guide
Spanning Tree Commands (Cont.)
Command Function
spanning-tree link-type
This command configures the
link type for Rapid Spanning
Tree.
Use the no form to restore the
default.
Syntax:
spanning-tree link-type {auto | point-to-point | shared}
no spanning-tree link-type
• auto - Automatically derived from the duplex mode setting.
• point-to-point - Point-to-point link.
• shared - Shared medium.
Default Setting: auto
Command Mode: Interface Configuration (Ethernet, Port Channel)
Command Usage: Specify a point-to-point link if the interface can only be
connected to exactly one other bridge, or a shared link if it can be con-
nected to two or more bridges.
When automatic detection is selected, the switch derives the link type from
the duplex mode. A full-duplex interface is considered a point-to-point link,
while a half-duplex interface is assumed to be on a shared link.
RSTP only works on point-to-point links between two bridges. If you desig-
nate a port as a shared link, RSTP is forbidden.
Example:
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree link-type point-to-point
spanning-tree protocol-
migration
This command re-checks the
appropriate BPDU format to
send on the selected interface.
Syntax:
spanning-tree protocol-migration interface
• interface
ethernet unit/port
unit - Stack unit. (Range: 1-8)
port - Port number. (Range: 1-26)
port-channel channel-id (Range: 1-6)
Command Mode: Privileged Exec
Command Usage: If at any time the switch detects STP BPDUs, including
Configuration or Topology Change Notification BPDUs, it will automatically
set the selected interface to forced STP-compatible mode. However, you
can also use the spanning-tree protocol-migration command at any time to
manually re-check the appropriate BPDU format to send on the selected
interfaces (i.e., RSTP or STP-compatible).
Example:
Console#spanning-tree protocol-migration ethernet 1/5
Console#