Specifying The Link Type - Cisco Nexus 6000 Series Configuration Manual

Configuring Multiple Spanning Tree
Step 5
This example shows how to prevent the specified interfaces from automatically interoperating with a connecting
switch that is not running MST:
switch# configure terminal
switch(config)# interface ethernet 1/4
switch(config-if)# spanning-tree mst simulate pvst disable

Specifying the Link Type

Rapid connectivity (802.1w standard) is established only on point-to-point links. By default, the link type is
controlled from the duplex mode of the interface. A full-duplex port is considered to have a point-to-point
connection; a half-duplex port is considered to have a shared connection.
If you have a half-duplex link physically connected point-to-point to a single port on a remote switch, you
can override the default setting on the link type and enable rapid transitions.
If you set the link to shared, STP reverts to 802.1D.
Procedure
Step 1
Step 2
Step 3
This example shows how to configure the link type as point to point:
switch# configure terminal
switch (config)# interface ethernet 1/4
switch(config-if)# spanning-tree link-type point-to-point
Command or Action
switch(config-if)# no spanning-tree
mst simulate pvst
Command or Action
switch# configure terminal
switch(config)# interface type
slot/port
switch(config-if)# spanning-tree
link-type {auto | point-to-point
| shared}
Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
Purpose
Sets the interface to the switch-wide MST and Rapid
PVST+ interoperation that you configured using the
spanning-tree mst simulate pvst global command.
Purpose
Enters configuration mode.
Specifies the interface to configure, and enters interface
configuration mode.
If this is a 10G breakout port, the slot/port syntax is
Note
QSFP-module/port.
Configures the link type to be either point to point or shared.
The system reads the default value from the switch connection.
Half-duplex links are shared and full-duplex links are point
to point. If the link type is shared, the STP reverts to 802.1D.
The default is auto, which sets the link type based on the
duplex setting of the interface.
Specifying the Link Type
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