
© 2007 Cisco Systems, Inc. All rights reserved. Cisco Confidential
16
SPASPA
IOCP
SPA
Agg.
…
Interconn.
SPASPA
IOCP
SPA
Agg.
…
Interconn.
SPASPA
IOCP
SPA
Agg.
…
Interconn.
Route
Processor
(Standby)
System Architecture Control Plane
Two different control plane links
separate from the dataplane links
–Ethernet out-of-band channel
(EOBC).
–I
2
C: Monitor health of hardware
components
SPA control links
–Run between IOCP and SPAs
ESP
(Active)
Interconn.
QFP
subsystem
Crypto
Assist
ESP
(standby)
Midplane
Route
Processor
(Active)
QFP
subsystem
Crypto
Assist
Interconn.
X
RP
FECP
FECP
RP
X
SPA Control
SPA Bus
I
2
C–Inter Integrated Circuit
EOBC-1Gbps
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