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© 2013 Cisco and/or its affiliates. All rights reserved.
BRKARC-3470 Cisco Public
68
Hardware IP Forwarding Process
• FIB TCAM lookup based on destination prefix (longest-match)
• FIB “hit” returns adjacency, adjacency contains rewrite information (next-
hop)
• Pipelined forwarding engine architecture also performs ACL, QoS, and
NetFlow lookups, affecting final forwarding result
- Architecture 2
- Cisco Nexus 7000 Switch 2
- Session Goal 3
- What is Nexus 7000? 4
- N7K-C7004 6
- Nexus 7004 Chassis 7
- ‒ Fabric Modules 8
- Supervisor Engine 2 / 2E 10
- M Series and F Series 11
- N7K-M224XP-23L 12
- N7K-M206FQ-23L 14
- * Roadmap feature 14
- 40G Transceivers – QSFP+ 16
- N7K-M202CF-22L 17
- CFP-40G-LR4 19
- • Single-flow limit is ~10G 20
- N7K-F248XP-25 21
- • Fibre and copper version 22
- 10G MAC 10G MAC 24
- To Fabric Modules 25
- F2-Only VDC 26
- ECMP hashing 29
- • Policy-based routing (PBR) 30
- F2/F2E Forwarding Engine 31
- Multistage Crossbar 34
- 230Gbps 35
- 110Gbps 36
- 220Gbps 330Gbps 440Gbps 36
- 550Gbps 36
- What About Nexus 7004? 37
- Central Arbitration 39
- Virtual Output Queues (VOQs) 40
- VOQ Destinations (VQIs) 41
- I/O Module Buffering Models 44
- M-Series I/O Modules 45
- Ingress Buffered Model 46
- Distributed Buffer Pool 47
- Layer 2 Forwarding 49
- M2 L2 Packet Flow – 10G 51
- 10G M2 Module Ingress Path 52
- – 10G M2 Module 53
- 10G M2 Module Egress Path 54
- M2 L2 Packet Flow – 40G/100G 56
- VOQ→Fabric 57
- – 40G / 100G M2 Module 58
- 40G example 60
- F2 / F2E L2 Packet Flow 61
- IP Forwarding 63
- IPv4 FIB TCAM Lookup (M1/M2) 65
- Forwarding Block 66
- Compare 66
- ECMP Load Sharing 67
- M2 L3 Packet Flow 68
- F2 / F2E L3 Packet Flow 69
- What is Classification? 71
- CL TCAM Lookup – ACL 72
- CL TCAM Lookup – QoS 73
- Atomic Policy Programming 74
- NetFlow on Nexus 7000 78
- Full vs. Sampled NetFlow 79
- Sampled NetFlow Details 80
- NetFlow on M1/M2 Modules 81
- NetFlow 82
- I/O Modules 84
- Supervisor Engines 84
- Fabrics 84
- Chassis 84
- Conclusion 85
- Q & A 86
- Complete Your Online Session 87
- BRKARC-3470 88
- Cisco Public 88
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