Bpdu Tunneling Configuration - HP 5820X series Configuration Manual
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Also See for 5820X series:
- Configuration manual (200 pages) ,
- Configuration manual (294 pages) ,
- Command reference manual (396 pages)
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BPDU tunneling configuration
As a Layer 2 tunneling technology, BPDU tunneling enables Layer 2 protocol packets from geographically
dispersed customer networks to be transparently transmitted over specific tunnels across a service provider
network.
Customers usually use dedicated lines in a service provider network to build their own Layer 2 networks.
As a result, very often, a customer network is broken down into parts located at different sides of the
service provider network. As shown in
belong to VLAN 100. User A's network is divided into network 1 and network 2, which are connected by
the service provider network. When Layer 2 protocol packets cannot be transparently transmitted in the
service provider network, User A's network cannot implement independent Layer 2 protocol calculation
(for example, STP spanning tree calculation). The Layer 2 protocol calculation in User A's network is
mixed with that in the service provider network.
Figure 30 BPDU tunneling application scenario
CE 1
User A network 1
VLAN 100
With BPDU tunneling, Layer 2 protocol packets from customer networks can be transparently transmitted
in the service provider network:
After receiving a Layer 2 protocol packet from User A network 1, PE 1 in the service provider
1.
network encapsulates the packet, replaces its destination MAC address with a specific multicast
MAC address, and then forwards the packet in the service provider network.
The encapsulated Layer 2 protocol packet (called bridge protocol data unit, BPDU for short) is
2.
forwarded to PE 2 at the other end of the service provider network, which de-encapsulates the
packet, restores the original destination MAC address of the packet, and then sends the packet to
User A network 2.
Depending on the device models, HP devices support BPDU tunneling for the following protocols:
CDP
•
DLDP
•
EOAM
•
GVRP
•
HGMP
•
LACP
•
LLDP
•
Figure
30, User A has two devices: CE 1 and CE 2, both of which
PE 1
ISP network
PE 2
CE 2
User A network 2
VLAN 100
97
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