3-3
Caution:
To prevent the devices in the service provider network from processing the tunnel packets as other
protocol packets, the MAC address of a tunnel packet must be a multicast address uniquely assigned to
the BPDU tunnel in the service provider network.
BPDU Tunnel Configuration
You can establish BPDU tunnels between Switch 5500-EI series Ethernet switches for the packets of
the following protocols:
z LACP (link aggregation control protocol)
z STP (spanning tree protocol)
z HGMP-related protocols, including: NDP (neighbor discovery protocol), NTDP (neighbor topology
discovery protocol), cluster MRC (cluster member remote control), and HABP (Huawei
authentication bypass protocol)
z Proprietary protocols of other vendors, including CDP (CISCO discovery protocol), PAGP (port
aggregation protocol), PVST (per-VLAN spanning tree), VTP (VLAN trunk protocol), and UDLD
(uni-directional link discovery)
Configuration Prerequisites
The edge devices can communicate with the user devices properly.
Configuring a BPDU Tunnel
Follow these steps to configure a BPDU tunnel:
To do... Use the command... Remarks
Enter system view
system-view
—
Configure a private multicast
MAC address for packets
transmitted along the tunnel
bpdu-tunnel tunnel-dmac
mac-address
Optional
By default, the destination MAC
address for packets transmitted
along a BPDU tunnel is
010f-e200-0003.
Enter Ethernet port view
interface interface-type
interface-number
—
Enable BPDU tunnel for
packets of a specific protocol
bpdu-tunnel protocol-type
Required
By default, BPDU tunnel is
disabled for packets of any
protocol.
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