Mstp Displaying And Debugging; Mstp Implementation Example - Huawei Quidway S3900 Series Operation Manual

Operation Manual – MSTP
Quidway S3900 Series Ethernet Switches-Release 1510
Note:
The BPDU Tunnel function can only be enabled on devices with STP enabled.
The BPDU Tunnel function can only be enabled on access ports.
To enable the BPDU Tunnel function, make sure the links between operator's
networks are trunk links.
If a fabric port exists on a switch, you cannot configure VLAN-VPN function on any
port of the switch.
As the VLAN-VPN function is unavailable on ports with 802.1x, GVRP, GMRP, STP,
or NTDP enabled, the BPDU Tunnel function is not applicable to these ports.

1.9 MSTP Displaying and Debugging

You can verify the above configurations by executing the display commands in any
view.
Execute the reset command in user view to clear MSTP statistics.
Table 1-40 Display and debug MSTP
Display
information about the current switch
Display region configuration
Clear MSTP-related statistics

1.10 MSTP Implementation Example

I. Network requirements
Implement MSTP in the network shown in Figure 1-7 to enable packets of different
VLANs to be forwarded along different spanning tree instances. The detailed
configurations are as follows:
All switches in the network belong to the same MST region.
Packets of VLAN 10, VLAN 30, VLAN 40, and VLAN 20 are forwarded along
spanning tree instance 1, instance 3, instance 4, and instance 0 respectively.
In this network, Switch A and Switch B operate on the distribution layer; Switch C and
Switch D operate on the access layer. VLAN 10 and VLAN 30 are limited in the
distribution layer and VLAN 40 is limited in the access layer. Switch A and Switch B are
configured as the root bridges of spanning tree instance 1 and spanning tree instance 3
respectively. Switch C is configured as the root bridge of spanning tree instance 4.
Operation
spanning tree-related
Huawei Technologies Proprietary
[
display stp
[ interface interface-list | slot slot-number ]
[ brief ]
display stp region-configuration
reset stp [ interface interface-list ]
1-44
Chapter 1 MSTP Configuration
Command
instance instance-id
]