Cisco Nexus 5500 Series - cdp enable

CHAPTER 2
Overview
This chapter contains the following sections:
•
Fibre Channel over Ethernet, page 3
•
Data Center I/O Consolidation, page 4
•
Virtual Interfaces, page 5
•
Ethernet Switching, page 5
•
FCoE and Fibre Channel Switching, page 5
•
QoS , page 6
•
Virtual Port Channels, page 6
•
Serviceability, page 6
•
Switch Management, page 7
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Network Security Features, page 8
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Virtual Device Contexts , page 8
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Licensing, page 8
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Typical Deployment Topologies, page 8
•
Supported Standards, page 11
Fibre Channel over Ethernet
Fibre Channel over Ethernet (FCoE) allows Fibre Channel traffic to be encapsulated over a physical Ethernet
link. FCoE frames use a unique EtherType so that FCoE traffic and standard Ethernet traffic can be carried
on the same link.
Classic Ethernet is a best-effort protocol; in the event of congestion, Ethernet will discard packets, relying on
higher level protocols to provide retransmission and other reliability mechanisms. Fibre Channel traffic requires
a lossless transport layer; as a data storage protocol, it is unacceptable to lose a single data packet. Native
Fibre Channel implements a lossless service at the transport layer using a buffer-to-buffer credit system.
Cisco Nexus 5500 Series NX-OS Fundamentals Configuration Guide, Release 7.x
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