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SPA Interface Processor: SIP-10G
Physical termination of SPA
Supports up to 4 SPA’s
–4 half-height, 2 full-height, 2 HH+1FH
–Full OIR support
Does not participate in forwarding
Limited QoS
–Ingress packet classification; high/low
–Ingress over-subscription buffering (low priority)
until ESP can service them.
Capture stats on dropped packets
Network clock distribution to SPA’s, reference
selection from SPA’s
IOCP manages Midplane links, SPA OIR,
SPA drivers
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