
© 2007 Cisco Systems, Inc. All rights reserved. Cisco Confidential
17
SPASPA
IOCP
SPA
Agg.
…
Interconn.
SPASPA
IOCP
SPA
Agg.
…
Interconn.
SPASPA
IOCP
SPA
Agg.
…
Interconn.
Route
Processor
(Standby)
RP
Interconn.
System Architecture-Dataplane
All data forwarding is through ESP
Exception: Punt path for Legacy
protocols – handled by the RP
Interconnect ASIC - Backplane
connection through ESI links
ESI (Enhanced SerDes
Interconnect) links are used for
Data forwarding
SPA-SPI links connect to the
backplane through the SPA-Agg
ASIC
ESP
(Active)
FECP
Interconn.
QFP
subsystem
Crypto
Assist
ESP
(standby)
FECP
Midplane
Route
Processor
(Active)
RP
Interconn.
QFP
subsystem
Crypto
Assist
Interconn.
SPA-SPI, 11.2Gbps
Hypertransport, 10Gbps
ESI 11.5Gbps
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