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Step
2.
Enter Ethernet interface view or Layer 2 aggregate
interface view.
3.
Perform mCheck.
NOTE:
An mCheck operation takes effect on a router that operates in MSTP or RSTP mode.
Configuring the VLAN Ignore feature
Traffic of a VLAN on a complex network may be blocked by the spanning tree.
Figure 15 VLAN connectivity blocked by MSTP
As shown in
Port A1 on Device A allows the traffic of VLAN 1 to pass through, and Port A2 allows the traffic of
•
VLAN 2 to pass through.
Port B1 on Device B allows the traffic of VLAN 1 to pass through, and Port B2 allows the traffic of
•
VLAN 2 to pass through.
Device A and Device B run a spanning tree protocol. Device A is the root bridge, and Port A1 and
•
Port A2 are designated ports. On Device B, Port B1 is the root port, and port B2 is the blocked port.
Traffic of 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 spanning tree calculation result.
Configuring the VLAN Ignore feature
To configure VLAN Ignore:
Step
1.
Enter system view.
2.
Enable VLAN Ignore for the
specified VLANs.
3.
Display VLAN Ignore-enabled
VLANs.
VLAN Ignore configuration example
Network requirements
1.
Figure
15:
Command
interface interface-type interface-number
stp mcheck
Command
system-view
stp ignored vlan vlan-list
display stp ignored-vlan [ |
{ begin | exclude | include }
regular-expression ]
54
Remarks
N/A
By default, VLAN Ignore is
disabled.
Optional.
Available in any view
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