Designating The Neighbor Type - Cisco 7604 Configuration Manual
Ios software configuration guide
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Chapter 19
Configuring Standard-Compliant IEEE MST
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 router running MST, you can override the default setting of the link type and enable rapid
transitions to the forwarding state.
To override the default link-type setting, perform this task:
Command
Step 1
Router# configure terminal
Step 2
Router(config)# interface {{ type
{port-channel number }}
Step 3
Router(config)# spanning-tree link-type
point-to-point
Step 4
Router(config)# end
Step 5
Router# show spanning-tree mst interface
interface_id
Step 6
Router# copy running-config startup-config
1.
type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
To return the port to its default setting, use the no spanning-tree link-type interface configuration
command.
Designating the Neighbor Type
A topology could contain both prestandard and 802.1s standard compliant devices. By default, ports can
automatically detect prestandard devices, but they can still receive both standard and prestandard
BPDUs. When there is a mismatch between a device and its neighbor, only the CIST runs on the
interface.
You can choose to set a port to send only prestandard BPDUs. The prestandard flag appears in all the
show commands, even if the port is in STP compatibility mode.
To override the default link-type setting, perform this task:
Command
Step 1
Router# configure terminal
Step 2
Router(config)# interface {{ type
{port-channel number }}
Step 3
Router(config)# spanning-tree mst pre-standard
Step 4
Router(config)# end
Step 5
Router# show spanning-tree mst interface
interface_id
Step 6
Router# copy running-config startup-config
1.
type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
OL-4266-08
Purpose
Enters global configuration mode.
1
(Optional) Specifies an interface to configure, and enters
slot/port } |
interface configuration mode.
Specifies that the link type of a port is point-to-point.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Purpose
Enters global configuration mode.
1
(Optional) Specifies an interface to configure, and enters
slot/port } |
interface configuration mode.
Specifies that the port can send only prestandard BPDUs.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
Configuring MST
19-27
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