H3C Technologies H3C S3100 Series Switches - Manual (Page 220)

Operation Manual – MSTP
H3C S3100-52P Ethernet Switch
Chapter 1 MSTP Configuration
1-45
Note:
z
The BPDU Tunnel function can be enabled on only STP-enabled devices.
z
The BPDU Tunnel function can only be enabled on access ports.
z
To enable the BPDU Tunnel function, make sure the links between operator’s
networks are trunk links.
z
The VLAN VPN function cannot be enabled on the ports where 802.1x, GVRP,
GMRP, STP, or NTDP is enabled.
1.9 Displaying and Maintaining MSTP
You can verify the above configurations by executing the display commands in any
view.
Execute the reset command in user view to clear statistics about MSTP.
Table 1-40 Display and maintain MSTP
Operation Command
Display the state and statistics
information about spanning trees of the
current device display stp [ instance instance-id ]
[ interface interface-list | slot
slot-number
] [ brief ]
Display region configuration display stp region-configuration
Clear statistics about MSTP reset stp [ interface interface-list ]
1.10 MSTP Configuration 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:
z
All switches in the network belong to the same MST region.
z
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 convergence layer; Switch C and
Switch D operate on the access layer. VLAN 10 and VLAN 30 are limited in the
convergence 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.