Cisco Reman Packet SVC Card PSC-A 16

The PSC provides increased aggregate throughput and performance and a higher number of subscriber sessions than other ASR 5000 packet processing cards. Specialized hardware engines support parallel distributed processing for compression, classification, traffic scheduling, forwarding, packet filtering, and statistics. The operating system running on the PSC treats the two core processors as a 6-way multi-processor. To optimize network efficiency and minimize down time, the system supports 1: n redundancy for PSC. If session recovery is enabled, the minimum number of PSC per chassis increases from one to four cards. Three PSCs are active and one PSC is standby (redundant). This minimum configuration protects against software failures only. In addition to increased hardware requirements, session recovery may reduce subscriber session capacity, performance, and data throughput. In the event of PSC failure, tasks are migrated from the active PSC to the standby card. The line card installed behind the PSC that was formerly active maintains the interfaces to the external network equipment. Redundancy Crossbar Cards (RCCs) provide a path for signaling and data traffic between the line card and the now active packet processing card.