Such SLAs are
essential, and end users often demand them since they are already accustomed to
such an assurance using the ATM, Frame Relay, or Private Line services, and it is
only natural for them to expect the same of Ethernet services that support similar
and next-generation applications.
?– SLA parameters A set of configurable parameters allows a Service Provider to
actually define the specific SLAs associated with a particular commercial service.
These parameters provide significant latitude for defining numerous levels of service
premiums. Further, these parameters although associated with a service, are
enforced across the underlying infrastructure delivering that service.
?– Provisioning SLA The QoS provides a hard performance guarantee based on
the typical elements that define QoS in networks such as availability at a particular
performance, packet loss, packet delay, and packet delay variation or jitter.
In a LAN with its abundant bandwidth and high performance, QoS is usually not an
issue; the simple priority queuing capability using IEEE 802.1P/802.1D provides a ???soft???
9 End-to-end refers to the end points between which an Ethernet service is delivered.
Pages:
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194