H3C S6850 Series, Руководство по настройке

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Figure 25 VLAN spanning tree topologies
Example: Configuring DRNI with PVST
Network configuration
As shown in Figure 26 , Device A and Device B work at the distribution layer, and Device C and
Device D work at the access layer.
Configure DRNI on Device A and Device B. In the DR system, Device A is the primary DR device,
and Device B is the secondary DR device.
Configure PVST on the devices to meet the following requirements:
•
Frames of a VLAN are forwarded along the spanning trees of the VLAN.
•
VLAN 10, VLAN 20, and VLAN 30 are terminated on the distribution layer devices.
•
The root bridge of VLAN 10, VLAN 20, and VLAN 30 is the DR system formed by Device A and
Device B.
NOTE:
•
As a best practice, do not connect ports on Device A and Device B that have the same port ID with each
other, for example Layer 2 aggregate ports. Otherwise, when Device A and Device B communicate through
the link, the spanning tree protocol determines that the device receives its own BPDUs. Loop guard will
block the link, though spanning tree features are not affected.
•
You can view port IDs of interfaces on the device by using the
display stp interface
command.
•
The preceding restrictions do not apply to IPPs and their member ports.