Cisco 2975 - Catalyst LAN Base Switch Uživatelský manuál stáhnout pdf (Strana 12)

© 2007 Cisco Systems, Inc. All rights reserved. Cisco Confidential

12

Embedded Services Processor (ESP):

ESP-5G, ESP-10G, ESP-20G

 Centralized, programmable forwarding engine

(i.e. QFP subsystem (PPEs) and crypto engine)

providing full-packet processing

 Packet buffering and queuing/scheduling (BQS)

–For output traffic to carrier cards/SPA’s

–For special features such as input shaping, reassembly,

replication, punt to RP, etc.

 Interconnect providing data path links (ESI) to/from

other cards over mid-plane

–Transports traffic into and out of QFP

–Input scheduler for allocating QFP BW among ESI’s

 FECP CPU managing QFP, crypto device,

mid-plane links, etc

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