It differs from simple
Ethernet in that it allows hard quality of service guarantees to individual client
ports. Some of the QoS features are discussed next.
Guaranteed Bandwidth If a client is provisioned with 20 Mbps of guaranteed bandwidth,
it gets that amount as long as the line facilities are not reduced due to link
failure or deprovisioning.
If a single Ethernet client is provisioned to have multiple priority bandwidth assignments
(i.e., 10 Mbps of guaranteed, 10 Mbps of shared/burst, and 10 Mbps of best effort),
it is up to the client source device to prioritize its own packet streams appropriately. The
circuit-bonding device will always transport the guaranteed bandwidth first, followed by
the shared/burst, and then the best effort as long as sufficient line bandwidth exists.
Priorities and Provisioning
?– A circuit-bonded system can tag guaranteed, burst, and best effort per port (i.e.,
DS3/OC-n). A service provider can assign priorities on a per-client basis. This
stands in contrast to traditional Multi-Service Provisioning Platforms (MSPPs),
which cannot provide prioritization; this needs to be done at Layers 2 and 3.
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