HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 2 - LAN Switching Co - Page 121

stp mode, Con d in system view, the setting takes effect globally.

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View System view, Ethernet interface view, Layer 2 aggregate interface view Default level 2: System level Parameters None Description Use stp mcheck to perform the mCheck operation globally or on a port. If a port on a device running MSTP or RSTP mode connects to an STP device, the port will automatically migrate to the STP mode. It will not be able to migrate automatically back to the MSTP or RSTP mode, so it will remain operating in the STP mode until the STP switch is shut down or removed, or migrated to the MSTP or RSTP mode. Then, you can perform an mCheck operation to force the port to migrate to the MSTP or RSTP mode. Suppose Device A running STP, Device B with no spanning tree feature enabled, and Device C running RSTP or MSTP are connected in order. Device B will transparently transmit the STP BPDUs, and the port on Device C and connecting to Device B will transition to the STP mode. After you enable the spanning tree feature on Device B, to run RSTP or MSTP between Device B and Device C, you must perform an mCheck operation on the ports interconnecting Device B and Device C, in addition to configuring the spanning tree to operate in RSTP or MSTP mode on Device B. The device operates in STP, RSTP or MSTP mode depending on the spanning tree mode setting. The stp mcheck command is effective only when the device operates in MSTP or RSTP mode. Configured in system view, the setting takes effect globally. Configured in Ethernet interface view, the setting takes only effect on the interface. Configured in Layer 2 aggregate interface view, the setting takes effect only on the aggregate interface. Configured on a member port in an aggregation group, the setting takes effect only after the port leaves the aggregation group. Related commands: stp mode. Examples # Perform mCheck on GigabitEthernet 1/0/1. system-view [Sysname] interface gigabitethernet 1/0/1 [Sysname-GigabitEthernet1/0/1] stp mcheck stp mode Syntax stp mode { stp | rstp | mstp } View undo stp mode System view 113

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113
View
System view, Ethernet interface view, Layer 2 aggregate interface view
Default level
2: System level
Parameters
None
Description
Use
stp mcheck
to perform the mCheck operation globally or on a port.
If a port on a device running MSTP or RSTP mode connects to an STP device, the port will automatically
migrate to the STP mode. It will not be able to migrate automatically back to the MSTP or RSTP mode, so
it will remain operating in the STP mode until the STP switch is shut down or removed, or migrated to the
MSTP or RSTP mode. Then, you can perform an mCheck operation to force the port to migrate to the
MSTP or RSTP mode.
Suppose Device A running STP, Device B with no spanning tree feature enabled, and Device C running
RSTP or MSTP are connected in order. Device B will transparently transmit the STP BPDUs, and the port
on Device C and connecting to Device B will transition to the STP mode. After you enable the spanning
tree feature on Device B, to run RSTP or MSTP between Device B and Device C, you must perform an
mCheck operation on the ports interconnecting Device B and Device C, in addition to configuring the
spanning tree to operate in RSTP or MSTP mode on Device B.
The device operates in STP, RSTP or MSTP mode depending on the spanning tree mode setting.
The
stp mcheck
command is effective only when the device operates in MSTP or RSTP mode.
Configured in system view, the setting takes effect globally.
Configured in Ethernet interface view, the setting takes only effect on the interface.
Configured in Layer 2 aggregate interface view, the setting takes effect only on the aggregate interface.
Configured on a member port in an aggregation group, the setting takes effect only after the port leaves
the aggregation group.
Related commands:
stp mode
.
Examples
# Perform mCheck on GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp mcheck
stp mode
Syntax
stp mode
{
stp
|
rstp
|
mstp
}
undo stp mode
View
System view