Virtual Private LAN Services
7750 SR OS Services Guide Page 787
Figure 108: Mobile Backhaul Use Case
The wireless service provider in this example purchases an ELINE service between the ENNIs on
PBB edge nodes, BEB1 and BEBn. PBB services are employing a type of Ethernet tunneling (Eth-
tunnels) between BEBs where primary and backup member paths controlled by G.8031 1:1
protection are used to ensure faster backbone convergence. Ethernet CCMs based on IEEE
802.1ag specification may be used to monitor the liveliness for each individual member paths.
The Ethernet paths span a native Ethernet backbone where the BCBs are performing simple
Ethernet switching between BEBs using an Epipe or a VPLS service.
Although the network diagram shows just the Epipe case, both PBB ELINE and ELAN services
are supported.
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