?– Protection of client channels against individual channel failures.
?– Simple addition of transmission channels to the aggregated group.
Figure 10.4 Client-and line-side view of circuit bonding
Clients sharing
concatenated
bandwidth
Concatenated
transmission
links
Concatenated bandwidth
Shared access
272 Chapter 10
?– Cross connection of transmission channels between transmit and receive ends.
?– Ability to function as a stand-alone transport protocol.
Circuit bonding is independent of the transmission format or protocol. It can be used
to provide transport over virtually any line transmission type and was not developed
for a specific network type. Furthermore, the protection afforded by circuit bonding is
available to all client signals regardless of their format.
Circuit bonding is also different from protocols that aggregate client-side interfaces.
While a circuit bonding platform can carry those clients over either single or multiple
facilities, it can carry mixed format signals equally well. As Figure 10.5 illustrates,
those clients can be packet-based or TDM-based.
How Ethernet Frames Are Transported over Circuit-Bonded Networks Circuit bonding can
be used to carry Ethernet frames over bonded OCns, DS3s, and T1/E1s.
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