This introduces potential delay and delay variation into the system and
makes video and voice services unpredictable.
RPR and Reliability A protocol called Resilient would obviously place a significant
emphasis on availability. Indeed, one of the primary characteristics of the protocol is
its ability to restore any service in less than 50 ms. The RPR protocol has two mechanisms
to restore service; steer and wrap. Applications are either more sensitive to lost
packets or delay. Steer and Wrap are mechanisms to minimize either packet loss or
delay, depending on the requirements of the application.
RPR and Management RPR has a sophisticated topology discovery protocol and
a management protocol built into the standard. These features provide information
that is useful for the management standards that are being defined in the ITU, the
IEEE and the MEF. Taken together this group of protocols will create and end-to-end
OAM that will provide the kind of visibility required for large service provider Carrier
Ethernet Networks.
RPR and Scalability RPR is defined for data rates from 155 Mbps up to 10 Gbps. It
also does nothing to preclude the introduction of faster data rate RPR.
Pages:
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766