H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 79)

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NOTE:
An mCheck operation takes effect on a device 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 16 VLAN connectivity blocked by MSTP
As shown in Figure 16 :
• 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
Follow these steps to configure VLAN Ignore:
To do... Use the command... Remarks
Enter system view system-view —
Enable VLAN Ignore for the
specified VLANs
stp ignored vlan vlan-list
Required
Disabled by default.
Display VLAN Ignore-enabled
VLANs
display stp ignored-vlan [ | { begin
| exclude | include }
regular-expression ]
Optional
Available in any view.
VLAN Ignore configuration example
1. Network requirements
As shown in Figure 17 :
• Device A and Device B are directly connected.