Alcatel-Lucent 7750 SR - Figure 117: Access Multi-Homing Solution for PBB EPIPE; Solution Description for PBB Epipe over G.8031 Ethernet Tunnels

Virtual Private LAN Services
7750 SR OS Services Guide Page 803
Solution Description for PBB Epipe over G.8031 Ethernet Tunnels
This section discusses the Access Multi-Homing solution for PBB ELINE over an infrastructure
of G.8031 Ethernet tunnels. Although a specific use case is used, the solution works the same for
any other PBB infrastructure: for example, native PBB, pseudowire/MPLS, or a combination.
The physical topology described in section 5.1 is used in this example. The PBB ELINE service
and the related BVPLS infrastructure are depicted in Figure 117.
Figure 117: Access Multi-Homing Solution for PBB EPIPE
The ELINE instances are connected through the B-VPLS infrastructure. Each B-VPLS is
interconnected to the BEBs in the remote pair using the G.8031, Ethernet Protection Switched
(EPS) tunnels. Only the active Ethernet paths are shown in the network diagram to simplify the
explanation. Split Horizon Groups may be used on EPS tunnels to avoid running MSTP/RSTP in
the PBB core.
The same BMAC addressing scheme is used as in the ELAN case: a BMAC per B-VPLS and
additional BMACs associated with each MC-LAG connected to an EPIPE SAP. The BMACs
OSSG353
BCB-E BCB-F
MC-LAG
P12
Standby
P11
Active
P10
Standby
P9
Active
BMAC
A1
Bridge Table on
BEB D
BMAC A1 EP8
Bridge Table on
BEB C
BMAC A1 EP5
Bridge Table on
BEB A
BMAC C1 EP1
Bridge Table on
BEB B
BMAC C1 EP3
BMAC
D
BMAC
C
C-MAC-1 C-MAC-2
ES1 ES2
BEB
D
BEB
C
IP6EP8 EP2
BVPLS Instance
EPIPE Instance
EPS Tunnel
EP4EP5EP7 EP1EP3
BEB
B
BEB
A
MC-LAG
BMAC
B
BMAC
A
BMAC
C1
BMAC
A1
BMAC
C1