H3C S3100-52P Command Manual page 13

Command Manual – VLAN-VPN
H3C S3100-52P Ethernet Switch
Value
pvst
stp
vtp
udld
all: Disables BPDU tunnel for all protocol packets.
Description
Use the bpdu-tunnel command to enable BPDU tunnel on a port, so that packets of the
specified protocol will be transparently transmitted through the BPDU tunnel on the
port.
Use the undo bpdu-tunnel command to disable BPDU tunnel on a port.
By default, BPDU tunnel is disabled on a port.
After you enable a port to transmit packets of a specified protocol type through the
BPDU tunnel, when the port receives such a packet, it will use the specified private
multicast MAC address to replace the original destination MAC address of the packet
before sending it. As a result, the packet will not be recognized as a protocol packet by
other devices in the operator network during transmission. In this way, transparent
transmission is implemented.
You can use the bpdu-tunnel tunnel-dmac command to change the destination MAC
addresses of protocol packets to a specified multicast MAC address.
Caution:
If this command is enabled on a port for a specific protocol, the specific protocol
cannot be enabled on the port. For example, if you have configured the
bpdu-tunnel lacp command, the lacp enable command cannot be enabled on the
port.
The commands configured for service provider's devices at both ends of a BPDU
tunnel must be consistent. Otherwise, BPDU packets of the customer network
cannot be transparently transmitted properly.
Examples
# Enable BPDU tunnel for packets of LACP.
Chapter 3 BPDU Tunnel Configuration Commands
Enable/Disable BPDU tunnel for per-VLAN spanning tree
(PVST).
Enable/Disable BPDU tunnel for spanning tree protocol (STP).
Enable/Disable BPDU tunnel for VLAN trunk protocol (VTP).
Enable/Disable BPDU tunnel for uni-directional link direction
(UDLD).
3-2
Description