Table of Contents

n3k_rel_notes_503_u3_2a.fm

Cisco Nexus 3000 Series NX-OS Release Notes, Release 5.0(3)U3(2a)

Release Date: June 15, 2012

Current Release: Cisco NX-OS Release 5.0(3)U3(2a)

This document describes the features, caveats, and limitations for Cisco Nexus 3000 Series switches. Use this document in combination with documents listed in the “Obtaining Documentation and Submitting a Service Request” section.

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

Table 1-1 Online History Change

Part Number

Revision

Date

Description

OL-26631-03

A0

June 15, 2012

Created NX-OS Release 5.0(3)U3(2a) release notes.

B0

June 19, 2012

Updated part number for Cisco Nexus 3048 switch.

C0

June 21, 2021

.

D0

November 28, 2013

Updated resolved caveat CSCuh79034.

Contents

This document includes the following sections:

- Introduction

- System Requirements

- New and Changed Features

- Upgrade Guidelines

- Limitations

- Caveats

- Obtaining Documentation and Submitting a Service Request

Introduction

The Cisco NX-OS software is a data center-class operating system built with modularity, resiliency, and serviceability at its foundation. 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. Cisco NX-OS software offers the following benefits:

- Cisco NX-OS runs on all Cisco data center switch platforms: Cisco Nexus 7000, Nexus 5000, Nexus 4000, Nexus 3000, Nexus 2000, and Nexus 1000V Series switches.

- Cisco NX-OS software interoperates with Cisco products running any variant of Cisco IOS software and also with any networking operating system that conforms to common networking standards.

- Cisco NX-OS modular processes are triggered on demand, each in a separate protected memory space. Processes are started and system resources are allocated only when a feature is enabled. The modular processes are governed by a real-time preemptive scheduler that helps ensure timely processing of critical functions.

- Cisco NX-OS provides a programmatic XML interface based on the NETCONF industry standard. The Cisco NX-OS XML interface provides a consistent API for devices. Cisco NX-OS also provides support for Simple Network Management Protocol (SNMP) Versions 1, 2, and 3 MIBs.

- Cisco NX-OS enables administrators to limit access to switch operations by assigning roles to users. Administrators can customize access and restrict it to the users who require it.

Cisco Nexus 3000 Series Switches

The Cisco Nexus 3000 Series switches are high-performance, high-density, ultra-low-latency Ethernet switches that provide line-rate Layer 2 and Layer 3 switching. The Cisco Nexus 3000 Series includes the following switches:

- The Cisco Nexus 3064 switch is a 1 RU switch that supports 48 1- or 10-Gigabit downlink ports, four QSFP+ ports that can be used as a 40 Gigabit Ethernet port or 4 x10-Gigabit Ethernet ports, one 10/100/1000 management port, and one console port.

- The Cisco Nexus 3048 switch is a 1 rack unit (RU) switch that supports 48 10/100/1000 Ethernet server-facing (downlink) ports, four 10-Gigabit network-facing (uplink) ports, one100/1000 management port, and one console port.

- The Cisco Nexus 3016 is a 1 RU, 16-port QSFP+ switch. Each QSFP+ port can be used as a 40-Gigabit Ethernet port or 4 x10-Gigabit Ethernet ports.

Each switch includes one or two power supply units and one fan tray module, and each switch can be ordered with either forward (port-side exhaust) airflow or reverse (port-side intake) airflow for cooling. All platforms support both AC and DC power-supplies. All combinations of power (AC/DC) and airflow (forward/reverse) are available. The Cisco Nexus 3000 Series switches run the industry-leading Cisco NX-OS Software operating system.

System Requirements

This section includes the following topics:

- Memory Requirements

- Hardware Supported

- Twinax Cable Support on Cisco Nexus 3000 Switches

Memory Requirements

The Cisco NX-OS Release 5.0(3)U3(2a) software requires 135MB of flash memory.

Hardware Supported

.

shows the hardware supported by Cisco NX-OS Release 5.0(3) software.

shows the transceivers supported by Cisco NX-OS Release 5.0(3) software.

Table 1-2 Hardware Supported by Cisco NX-OS Release 5.0(3)Software

Supported Cisco NX-OS Release

Hardware

Part Number

5.0(3)U3(2a),

5.0(3)U3(2),

5.0(3)U3(1)

5.0(3)U2(2d),5.0(3)U2(2c),5.0(3)U2(2b)

5.0(3)U2(2a)

5.0(3)U2(2), 5.0(3)U2(1),

5.0(3)U1(2a), 5.0(3)U1(2)

5.0(3)U1(1d)

Cisco Nexus 3000 Series

Cisco Nexus 3016 switch

N3K-C3016Q-40GE

X

X

X

—

—

Cisco Nexus 3048 switch

N3K-C3048TP-1GE

X

X

—

—

—

Cisco Nexus 3064-X switch

N3K-C3064PQ-10GX

X

—

—

—

—

Cisco Nexus 3064-E switch

N3K-C3064PQ-10GE

X

X

X

X

—

Cisco Nexus 3064 switch

N3K-C3064PQ

X

X

X

X

X

Cisco Nexus 3048 fan module, Forward airflow (port-side exhaust)

N3K-C3048-FAN

X

X

—

—

—

Cisco Nexus 3048 fan module, Reverse airflow (port-side intake)

N3K-C3048-FAN-B

X

X

—

—

—

Cisco Nexus 3064-X forward airflow (port-side exhaust), AC power supply

N3K-C3064-X-FA-L3

X

—

—

—

—

Cisco Nexus 3064-X reversed airflow (port-side intake), AC power supply

N3K-C3064-X-BA-L3

X

—

—

—

—

Cisco Nexus 3064-X forward airflow (port-side exhaust), DC power supply

N3K-C3064-X-FD-L3

X

—

—

—

—

Cisco Nexus 3064-X forward airflow (port-side intake), DC power supply

N3K-C3064-X-BD-L3

X

—

—

—

—

Cisco Nexus 3064 fan module, Forward airflow (port-side exhaust); also used in the Cisco Nexus 3016

N3K-C3064-FAN

X

X

X

X

X

Cisco Nexus 3064 fan module, Reverse airflow (port-side intake); also used in the Cisco Nexus 3016

N3K-C3064-FAN-B

X

X

X

X

X

Cisco Nexus 3000 power supply, Forward airflow (port-side exhaust)

N2200-PAC-400W

X

X

X

X

X

Cisco Nexus 3000 power supply, Reverse airflow (port-side intake)

N2200-PAC-400W-B

X

X

X

X

X

Cisco Nexus 2000 power supply, Forward airflow (port-side exhaust)

N2200-PDC-400W

X

X

X

X

X

Cisco Nexus 2000 DC power supply, Reverse airflow (port-side intake)

N3K-PDC-350W-B

X

X

X

X

X

Table 1-3 Transceivers Supported by Cisco NX-OS Release 5.0(3)Software

Supported Cisco NX-OS Release

Transceivers

Part Number

5.0(3)U3(2a),

5.0(3)U3(2),

5.0(3)U3(1)

5.0(3)U2(2c),

5.0(3)U2(2b), 5.0(3)U2(2a), 5.0(3)U2(2)

5.0(3)U2(1)

5.0(3)U1(2a)

5.0(3)U1(2)

5.0(3)U1(1a), 5.0(3)U1(1b), 5.0(3)U1(1d)

QSFP

40GBASE-SR4 QSFP transceiver module with mpo connector 100 m

QSFP-40G-SR4

X

X

X

X

X

X

40GBASE-CR4 passive copper cable, 1 m

QSFP-H40G-CU1M

X

X

X

X

X

X

40GBASE-CR4 passive copper cable, 3 m

QSFP-H40G-CU3M

X

X

X

X

X

X

40GBASE-CR4 passive copper cable, 5 m

QSFP-H40G-CU5M

X

X

X

X

X

X

QSFP to 4xSFP10G passive copper splitter cable, 1 m

QSFP-4SFP10G-CU1M

X

X

X

X

X

X

QSFP to 4xSFP10G passive copper splitter cable, 3 m

QSFP-4SFP10G-CU3M

X

X

X

X

X

X

QSFP to 4xSFP10G passive copper splitter cable, 5 m

QSFP-4SFP10G-CU5M

X

X

X

X

X

X

10-Gigabit

10GBASE-SR SFP+ module (multimode fiber [MMF])

SFP-10G-SR

X

X

X

X

X

X

10GBASE-LR SFP+ module (single-mode fiber [SMF])

SFP-10G-LR

X

X

X

X

X

X

10GBASE-ER SFP+ module (single-mode fiber [SMF])

SFP-10G-ER

X

X

X

X

X

X

10GBASE-ZR SFP+ module (single-mode fiber [SMF])

SFP-10G-ZR

X

10GBASE-CU SFP+ cable 1 m (Twinax cable)

SFP-H10GB-CU1M

X

X

X

X

X

X

10GBASE-CU SFP+ cable 3 m (Twinax cable)

SFP-H10GB-CU3M

X

X

X

X

X

X

10GBASE-CU SFP+ cable 5 m (Twinax cable)

SFP-H10GB-CU5M

X

X

X

X

X

X

1-Gigabit Ethernet

1000BASE-T SFP

GLC-T

X

X

X

X

X

X

Gigabit Ethernet SFP, LC connector SX transceiver (MMF)

GLC-SX-MM

X

X

X

X

X

X

Gigabit Ethernet SFP, LC connector LX/LH transceiver (SMF)

GLC-LH-SM

X

X

X

X

X

X

Twinax Cable Support on Cisco Nexus 3000 Switches

Starting with Cisco Release NX-OS 5.0(3)U1(1), the following algorithm is used to detect SFP+ twinax cables on Cisco Nexus 3000 switches:

If the attached interconnect (transceiver) is a twinax cable:

- Verify the transceiver SPROM to match Cisco magic code.

- If the check succeeds, bring up the interface; else check whether the Vendor Part Number (PN) has been certified.

- If the Vendor PN is certified, bring up the interface; else print the following warning message stating that a non-Cisco transceiver is attached and try to bring up the port.

2009 Oct 9 01:46:42 switch %ETHPORT-3-IF_NON-CISCO_TRANSCEIVER: Non-Cisco transceiver on interface Ethernet1/18 is detected.

Starting with Cisco Release NX-OS 5.0(3)U3(1), the following algorithm is used to detect copper splitter (QSFP) cables on Cisco Nexus 3000 switches:

A Cisco Nexus 3000 switch allows any copper splitter (QSFP, connector type 0x21) cable to come up, however the following disclaimer applies to non-Cisco manufactured and non-Cisco certified QSFP copper splitter cables.

If a customer has a valid support contract for Cisco Nexus switches, Cisco TAC will support twinax cables that are a part of the compatibility matrix for the respective switches. However, if the twinax cables are not purchased through Cisco, a customer cannot return these cables through an RMA to Cisco for replacement.

If a twinax cable that is not part of the compatibility matrix is connected into a system, Cisco TAC will still debug the problem, provided the customer has a valid support contract on the switches. However TAC may ask the customer to replace the cables with Cisco qualified cables if there is a situation that points to the cables possibly being faulty or direct the customer to the cable provider for support. Cisco TAC cannot issue an RMA against uncertified cables for replacement.

New and Changed Features

Cisco NX-OS Release 5.0(3)U3(2a) is a maintenance release that includes bug fixes. This release does not include new software features.

Upgrade Guidelines

for details about how to work around this issue.

Note This restriction does not apply to Cisco NX-OS Release 5.0(3)U3(2a) and Cisco NX-OS Release 5.0(3)U3(2).

In Cisco NX-OS Release 5.0(3)U3(1), support for IPv6 has been added in CoPP. To enable redirection of IPv6 control packets to the CPU, IPv6 CoPP must be configured on the system. Performing the write erase command on a device running Release 5.0(3)U3(1) automatically applies CoPP on the device and ensures that all IPv4 and IPv6 related CoPP configuration is setup correctly.

If you upgrade from a Cisco NX-OS release that does not support the CoPP feature to a release that does support the CoPP feature, you must run the setup utility after the upgrade to enable CoPP on the device.

If you upgrade from Cisco NX-OS Release 5.0(3)U2(2) (which supports the CoPP feature) to Cisco NX-OS Release 5.0(3)U3(1) (which adds CoPP classes for IPv6 support), you must run the setup script to enable the IPv6 CoPP feature on the device.

Limitations

There are no known limitations for Cisco NX-OS Release 5.0(3)U3(2a).

Caveats

Open and resolved caveat record numbers are provided with links to the Bug Toolkit where you can find details about each caveat.

This section includes the following topics:

- Resolved Caveats

- Open Caveats

Resolved Caveats

lists descriptions of resolved caveats in Cisco NX-OS Release 5.0(3)U3(2a). The record ID links to the Cisco Bug Toolkit where you can find details about the caveat.

Table 1-4 Cisco NX-OS Release 5.0(3)U3(2a)—Resolved Caveats

Record Number

Resolved Caveat Headline

CSCtz63189

On a Cisco Nexus 3064-X switch, port instability occurs in QSFP to SFP+ in a topology with fiber splitting cables.

CSCtz74788

Optical splitter cable issue with Cisco Nexus 3064-X switch.

CSCtz86011

OSPF and BGP flapping occurs when the port channel is brought up.

High CPU utilization due to bcm_usd and syslogd causing protocol flaps.

Note This caveat was resolved in Cisco NX-OS Release 5.0(3)U5(1g)

Open Caveats

lists descriptions of open caveats in Cisco NX-OS Release 5.0(3)U2(2a). The record ID links to the Cisco Bug Toolkit where you can find details about the caveat.

Table 1-5 Cisco NX-OS Release 5.0(3)U3(2a) —Open Caveats

Record Number

Open Caveat Headline

CSCtz51607

command is enabled.

CSCtz75692

On a Cisco Nexus 3064-X switch, 1G port goes down when swapping cables.

CSCtz75694

Flapping the fourth port of a 40G fiber-optic link flaps all ports between a Cisco Nexus 3064-X and a Cisco Nexus 3016.

CSCtz92050

On a Cisco Nexus 3016 switch, port instability occurs in QSFP to SFP+ in a topology with fiber splitting cables.

CSCua23405

Incorrect transceiver type information is displayed.

CSCua28616

When adding a QSFP transceiver to a Cisco Nexus 3064-E switch, the QSFP ports remain in SFP not inserted mode.

CSCua36472

On a Cisco Nexus 3064-X switch, the link remains up even with a speed mismatch.

CSCua42621

After flapping or reload occurs on a Cisco Nexus 3064-X switch, SFP-10G-LR and SFP-10G-ER SFP+ modules sometimes remain in link down state.

CSCua43397

Ethpc core file generated during install when upgrading from NX-OS Release 5.0(3)U3(2) to NX-OS Release 5.0(3)U3(2a).

CSCua44842

command is enabled.

CSCua48890

Interface input packet counter value is doubled when sending jumbo packets.

Related Documentation

Documentation for the Cisco Nexus 3000 Series Switch is available at the following URL:

The documentation set is divided into the following categories:

Release Notes

The release notes are available at the follwing URL:

Installation and Upgrade Guides

The installation and upgrade guides are available at the following URL:

Command References

The command references are available at the following URL:

Technical References

The technical references are available at the following URL:

Configuration Guides

The configuration guides are available at the following URL:

Error and System Messages

The system message reference guide is available at the following URL:

Documentation Feedback

. We appreciate your feedback.Related Documentation

Documentation for the Cisco Nexus 3000 Series Switch is available at the following URL:

Obtaining Documentation and Submitting a Service Request

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