Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes,Cisco NX-OS Release 5.1(3)N2(1a) and NX-OS Release 5.1(3)N2(1)

Send documentation comments to [e-mail]
2
Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes, Cisco NX-OS Release 5.1(3)N2(1a) and NX-OS Release 5.1(3)N2(1)
OL-26652-02
Contents
Contents
This document includes the following sections:
• Introduction, page 2
• System Requirements, page 3
• New and Changed Features, page 8
• Upgrading or Downgrading to a New Release, page 10
• Limitations, page 11
• Caveats, page 18
• Related Documentation, page 20
• Obtaining Documentation and Submitting a Service Request, page 21
Introduction
The Cisco NX-OS software is a data center-class operating system built with modularity, resiliency, and
serviceability at its foundation. Based on the industry-proven Cisco MDS 9000 SAN-OS software, Cisco
NX-OS helps ensure continuous availability and sets the standard for mission-critical data center
environments. The highly modular design of Cisco NX-OS makes zero-effect operations a reality and
enables exceptional operational flexibility.
Several new hardware and software features are introduced for the Cisco Nexus 5000 Series switch and
the Cisco Nexus 2000 Series Fabric Extender (FEX) to improve the performance, scalability, and
management of the product line. Cisco NX-OS Release 5.1 also supports all hardware and software
supported in Cisco NX-OS Release 5.0 and Cisco NX-OS Software Release 4.2.
Cisco Nexus 5000 Series Switches
The Cisco Nexus 5000 Series switches include a family of line-rate, low-latency, lossless 10-Gigabit
Ethernet, Cisco Data Center Ethernet, Fibre Channel over Ethernet (FCoE), and native Fibre Channel
switches for data center applications. The Cisco Nexus 5000 Series includes the Cisco Nexus 5500
Platform and the Cisco Nexus 5000 Platform.
For information about the Cisco Nexus 5000 Series, see the Cisco Nexus 5000 Series and Cisco Nexus
5500 Platform Hardware Installation Guide.
OL-26652-02 A0 June 5, 2012 Created NX-OS Release 5.1(3)N2(1a) release notes.
B0 June 27, 2012 Added Cisco Management Interface over SSH, page 9.
C0 June 28, 2012 Added CSCtc06276 to the “Limitations” section.
D0 July 11, 2012 Added the Cisco Nexus B22HP FEX.
Table 1 Online History Change
Part Number Revision Date Description