Bpdu Tunnel Configuration - H3C S3100-52P Operation Manual

Operation Manual – VLAN-VPN
H3C S3100-52P Ethernet Switch
tunnel here acts as a local link for user devices. It enables Layer 2 protocols to run
on a virtual local network.
Figure 3-2
a BPDU tunnel.
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Figure 3-2 The structure of a BPDU packet before it enters a BPDU tunnel
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Figure 3-3 The structure of a BPDU packet after it enters a BPDU tunnel
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.

3.2 BPDU Tunnel Configuration

You can establish BPDU tunnels between S3100-52P Ethernet switch for the packets
of the following protocols:
LACP (link aggregation control protocol)
STP (spanning tree protocol)
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)
and Figure 3-3 show the structure of a BPDU packet before and after it enter
Destination MAC address (Specified by protocol)
Destination MAC address (Private Multicast Address)
Chapter 3 BPDU Tunnel Configuration
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Source MAC address
BPDU Data
FCS
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Source MAC address
BPDU Data
FCS
3-3
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