Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring MSTP (Rev. 03)
Overview
© 2008 Foundry Networks, Inc
Page 34 of 70
o
The port’s link-type is set to Auto, and the MST algorithm has determined that the
LAN segment is to be operated in full duplex mode.
o
The port has been configured by management means for full duplex operation.
Otherwise, the MAC is considered to be connected to a LAN segment that is not point-
to-point (shared media).
•
Point-to-point
The port is considered to be connected to a point-to-point LAN segment which forces the
operational link-type to be point-to-point.
•
Shared
The port is considered to be connected to a shared media LAN segment which forces the
operational link-type to be Shared.
2. Operational link-type
If Admin link-type is set to Auto, then the value of Operational link-type
is determined in
accordance with the specific procedures defined for the switch entity concerned, as defined in
Admin link-type (auto).
If these procedures determine that the port is connected to a point-to-point LAN segment, then
Operational link-type
is set to point-to-point, otherwise it is set to
Shared
.
In the absence of a specific definition of how to determine whether the port is connected to a point-
to-point LAN segment or not, the value of link-type shall be
Shared
.
Command Syntax
device-name
(config-if
UU/SS/PP
)#
mstp link-type
{
point-to-point
|
shared
|
auto
}
Argument Description
point-to-point
Sets the MSTP link type to point-to-point.
shared
Sets the MSTP link type to
Shared
.
auto
Sets the MSTP link type dynamically according to the duplex status.
Setting the Default MSTP
The
mstp default
command, in Interface Configuration mode, sets the MSTP port configuration to
its default values.
Command Syntax
device-name
(config-if
UU/SS/PP
)#
mstp default
Shutting Down a Faulty Link
The
mstp link-flapping
command, in Interface Configuration mode, enables the MSTP Link
Flapping detection feature. The
no
form of this command disables the MSTP Link Flapping feature.
The MSTP Link Flapping feature automatically shuts down a link that flaps rapidly. When enabled,
this feature checks whether the time between switching the LinkDown and LinkUp statuses of the
port is shorter than a certain predefined control period and if it is, shuts down the link. The
recommended control period is 2000 ms.