1-34
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enter Ethernet interface view, or
Layer-2 aggregate interface view
interface interface-type
interface-number
—
Perform mCheck
stp mcheck
Required
Configuration Example
# Perform mCheck on port GigabitEthernet 1/0/1.
1) Method 1: Perform mCheck globally.
<Sysname> system-view
[Sysname] stp mcheck
2) Method 2: Perform mCheck in interface view.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp mcheck
Configuring the VLAN Ignore Feature
Traffic on a VLAN in a complex network may be blocked by the spanning tree.
Figure 1-6
VLAN connectivity blocked by MSTP
As shown above, port A on Device A allows the traffic of VLAN 1 to pass through, and port C allows the
traffic of VLAN2 to pass through; port B on Device B allows the traffic of VLAN 1 to pass through, and
port D allows the traffic of VLAN 2 to pass through. Device A and Device B run MSTP, Device A is the
root bridge, and port A and port C on it are designated ports. Port B on Device B is the root port, and port
D is the blocked port. Traffic on VLAN 2 is blocked.
Enabling the VLAN Ignore feature for a VLAN can make ports of the VLAN forward packets normally
rather than comply with the calculated result of MSTP.
Configuration Procedure
Follow these steps to configure VLAN Ignore:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Enable VLAN Ignore for the
specified VLAN(s)
stp ignored vlan vlan-list
Required
Display VLAN Ignore enabled
VLANs
display stp ignored-vlan
Available in any view
