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)

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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)

Release Date: June 5, 2012

Part Number: OL-26652-02 D0

Current Release: NX-OS Release 5.1(3)N2(1a)

This document describes the features, caveats, and limitations for the Cisco Nexus 5000 Series switches

and the Cisco Nexus 2000 Series Fabric Extenders. Use this document in combination with documents

listed in the “Related Documentation” section on page 20.

Note Release notes are sometimes updated with new information about restrictions and caveats. See the

following website for the most recent version of the Cisco Cisco Nexus 5000 Series and Cisco Nexus

2000 Series release notes:

http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/release/notes/Nexus_5000_Relea

se_Notes.html

Note Table 1 shows the online change history for this document.

Table 1 Online History Change

Part Number Revision Date Description

OL-26652-01 A0 March 20, 2012 Created NX-OS Release 5.1(3)N2(1) release notes.

B0 March 21, 2012 Updated the “Open Caveats” section.

C0 March 27, 2012 Updated the “Resolved Caveats—Cisco NX-OS

Release 5.1(3)N2(1a)” section.

D0 April 3, 2012 Added CSCty92945 to a downgrade limitation in the

“Limitations” section.

E0 April 13, 2012 Added 4-Gbps CWDM SFPs to Table 2.

Summary of content (22 pages)

PAGE 1
Send documentation comments to nexus5kdocs@cisco.com 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) Release Date: June 5, 2012 Part Number: OL-26652-02 D0 Current Release: NX-OS Release 5.1(3)N2(1a) This document describes the features, caveats, and limitations for the Cisco Nexus 5000 Series switches and the Cisco Nexus 2000 Series Fabric Extenders.
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Contents Send documentation c omment s to nexus5kdocs@cisco.com Table 1 Online History Change Part Number Revision Date OL-26652-02 A0 Description 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.
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System Requirements Send documentation c omment s to nexus5kdocs@cisco.com Cisco Nexus 2000 Series Fabric Extenders The Cisco Nexus 2000 Series Fabric Extender (FEX) is a highly scalable and flexible server networking solution that works with the Cisco Nexus 5000 Series switches to provide high-density and low-cost connectivity for server aggregation.
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System Requirements Send documentation c omment s to nexus5kdocs@cisco.com Table 2 Hardware Supported by Cisco NX-OS Release 5.1(x) Software (continued) Cisco NX-OS Release Support 5.0(3)N2(2a ) 5.1(3)N2(1a) 5.1(3)N1(1a) 5.0(3)N2(2) 5.1(3)N2(1) 5.1(3)N1(1) 5.0(3)N2(1) 5.0(3)N1(1) 5.0(2)N2(1) 5.
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System Requirements Send documentation c omment s to nexus5kdocs@cisco.com Table 2 Hardware Supported by Cisco NX-OS Release 5.1(x) Software (continued) Cisco NX-OS Release Support 5.0(3)N2(2a ) 5.1(3)N2(1a) 5.1(3)N1(1a) 5.0(3)N2(2) 5.1(3)N2(1) 5.1(3)N1(1) 5.0(3)N2(1) 5.0(3)N1(1) 5.0(2)N2(1) 5.
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System Requirements Send documentation c omment s to nexus5kdocs@cisco.com Table 2 Hardware Supported by Cisco NX-OS Release 5.1(x) Software (continued) Cisco NX-OS Release Support 5.0(3)N2(2a ) 5.1(3)N2(1a) 5.1(3)N1(1a) 5.0(3)N2(2) 5.1(3)N2(1) 5.1(3)N1(1) 5.0(3)N2(1) 5.0(3)N1(1) 5.0(2)N2(1) 5.
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System Requirements Send documentation c omment s to nexus5kdocs@cisco.com Table 2 Hardware Supported by Cisco NX-OS Release 5.1(x) Software (continued) Cisco NX-OS Release Support Hardware Part Number 5.0(3)N2(2a ) 5.1(3)N2(1a) 5.1(3)N1(1a) 5.0(3)N2(2) 5.1(3)N2(1) 5.1(3)N1(1) 5.0(3)N2(1) 5.0(3)N1(1) 5.0(2)N2(1) 5.
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New and Changed Features Send documentation c omment s to nexus5kdocs@cisco.com Table 3 Online Insertion and Removable Support by Cisco NX-OS Release 5.1(x) and Release 5.0(x) Software Cisco NX-OS Release Support 5.1(3)N2(1a) 5.1(3)N1(1a) 5.1(3)N2(1) 5.1(3)N1(1) 5.0(3)N2(2a) 5.0(3)N2(2) 5.0(3)N2(1) 5.0(3)N1(1) 5.0(2)N2(1) 5.
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New and Changed Features Send documentation c omment s to nexus5kdocs@cisco.com • Cisco Management Interface over SSH, page 9 Power On Auto-Provisioning Power On Auto Provisioning (POAP) automates the process of upgrading software images and installing configuration files on Nexus switches that are being deployed in the network for the first time. For more information, see the Cisco Nexus 5000 Series NX-OS Fundamentals Configuration Guide.
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Upgrading or Downgrading to a New Release Send documentation c omment s to nexus5kdocs@cisco.com The interface uses the XML-based Network Configuration Protocol (NETCONF) that allows you to manage devices and communicate over the interface with an XML management tool or a program. The Cisco NX-OS implementation of NETCONF requires you to use a Secure Shell (SSH) session for communication with the device.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com Supported Upgrade and Downgrade Paths Table 4 shows the upgrade and downgrade possibilities for Cisco NX-OS Release 5.1(3)N2(1a) and NX-OS Release 5.1(3)N2(1). Table 4 Cisco NX-OS Release 5.1(3)N2(1) Supported Upgrade and Downgrade Paths Current Cisco NX-OS Release Upgrade to NX-OS Release 5.1(3)N2(1a) or NX-OS Release 5.1(3)N2(1) Downgrade from NX-OS Release 5.1(3)N2(1a) or NX-OS Release 5.1(3)N2(1) 5.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com • Starting with Cisco NX-OS Release 4.2(1)N2(1), LACP fast timers are supported. If you downgrade to an earlier release that does not support this feature, entering the install all command displays the following warning: "Configuration not supported - Lacp fast rate is enabled", "Use \"lacp rate normal\" on those interfaces" Before downgrading to an earlier release, change the LACP rate to normal.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com or downgrading between Cisco NX-OS Release 4.2(1)N1(1) and earlier releases, Cisco NX-OS automatically converts the configuration to address this semantic change by adding or subtracting 38 to the MTU to address the Ethernet header size. In a vPC configuration, the MTU per class needs to be consistent on both switches in the vPC domain for the vPC peer link to come up. When upgrading/downgrading a working vPC setup between pre-4.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com These messages are informational only, and result in no loss of functionality. • If you configure Multiple Spanning Tree (MST) on a Cisco Nexus 5000 Series switch, we do not recommend that you partition the network into a large number of regions. • A downgrade from Cisco NX-OS Release 5.1(3)N1(1) to any 5.0(3)N1(x) image can cause the Cisco Nexus 5000 Series switch to fail. For details, see CSCty92945.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com – Use a dedicated front panel port as a vPC+ keepalive. The port should be in CE mode. – Use a dedicated VLAN to carry the keepalive interface. The VLAN should be CE VLAN. – Add the management keyword to the corresponding SVI so that the failure of a Layer 3 module will not bring down the SVI interface.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.com • Spanned FCoE frames do not preserve original SMAC and DMAC fields. The Ethernet header gets modified as the frame is spanned to the destination. The modified header fields are displayed when monitored on the SPAN destination. • The CoS value in spanned FCoE frames on the Ethernet SPAN destination port does not match with the CoS value in the SPAN FCoE source frame. The CoS value on the captured SPAN FCoE frame should be ignored.
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Limitations Send documentation c omment s to nexus5kdocs@cisco.
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Caveats Send documentation c omment s to nexus5kdocs@cisco.com Upgrading and Downgrading When a Layer 3 license is installed, the Cisco Nexus 5500 platform does not support an ISSU. Layer 3 module hot swaps are not supported. Cisco Nexus 5548P Daughter Card (N55-D160L3) Before installing a Layer 3 daughter card (N55-D160L3) into a Cisco Nexus 5548P switch, you must upgrade to Cisco NX-OS Release NX-OS Release 5.0(3)N1(1c) or a later release, and then install the card into the chassis.
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Caveats Send documentation c omment s to nexus5kdocs@cisco.com Resolved Caveats—Cisco NX-OS Release 5.1(3)N2(1a) Table 6 lists the caveats that are resolved in Cisco NX-OS Release 5.1(3)N2(1a) . The caveats may be open in previous Cisco NX-OS releases. Table 6 Cisco NX-OS Release 5.1(3)N2(1a) Resolved Caveats Record Number Resolved Caveat Headline CSCty07729 Custom Perl scripts can cause the Cisco Nexus 5000 Series switch to fail with kernel panic.
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Related Documentation Send documentation c omment s to nexus5kdocs@cisco.com Table 7 Cisco NX-OS Release 5.1(3)N2(1) Resolved Caveats Record Number Resolved Caveat Headline CSCtu81489 Configuring a Layer 3 port with no license followed by a hot removal of a GEM causes the switch to fail. CSCtw65587 Fabric ports go to hardware failure when a Layer 2 vPC is configured as a SPAN source. CSCty61539 FWM core @fu_cb_restore_pss_data - ISSU from Release 5.0(3)N2(1) to Release 5.1(3)N2(1).
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Related Documentation Send documentation c omment s to nexus5kdocs@cisco.
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Related Documentation Send documentation c omment s to nexus5kdocs@cisco.com Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R) ©2012 Cisco Systems, Inc.