
© 2012 Cisco and/or its affiliates. All rights reserved.
Presentation_ID
Cisco Public
© 2013 Cisco and/or its affiliates. All rights reserved.
BRKARC-3470 Cisco Public
33
F2/F2E Forwarding Engine
Decision Engine
Layer 3 Lookup
QoS / ACL
Ingress Parser
MAC
Table
FIB/ADJ
CL
L2 Lookup (post-L3)
Port A
1G/10G
Port D
1G/10G
Port B
1G/10G
Port C
1G/10G
Pause Latency Buffer
1G/10G MAC
To/From Central
Arbiter
To Fabric From Fabric
Ingress
Buffer (VOQ)
Virtual output
queues
L2 Lookup (pre-L3)
Egress Parser
1G/10G MAC
Egress
Buffer
4 X 10G
SoC
Ingress and egress
forwarding decisions
(L2/L3 lookups,
ACL/QoS, etc.)
“Skid buffer” –
Accommodates pause
reaction time
Four front-panel
interfaces per
ASIC
1G and 10G capable
interface MAC
Egress fabric
receive buffer
Forwarding
tables
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