Table of Contents

n3k_rel_notes_6_0_2_a6_1.fm

Cisco Nexus 3500 Series NX-OS Release Notes, Release 6.0(2)A6(1)

Release Date: March 5, 2015

Current Release: Cisco NX-OS Release 6.0(2)A6(1)

This document describes the features, bugs, and limitations for Cisco Nexus 3500 Series switches. Use this document in combination with documents listed in the “Obtaining Documentation and Submitting a Service Request” section.

Note Release notes are sometimes updated with new information about restrictions and bugs. See the following website for the most recent version of the Cisco Nexus 3500 Series release notes: http://www.cisco.com/c/en/us/support/switches/nexus-3000-series-switches/products-release-notes-list.html

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

Table 1 Online History Change

Revision

Date

Description

A0

March 5, 2015

Created NX-OS Release 6.0(2)A6(1) release notes.

B0

April 9, 2015

Added CSCuq41497 to “Open Bugs for this Release”.

Contents

This document includes the following sections:

- Introduction

- System Requirements

- New and Changed Features

- Upgrade and Downgrade Guidelines

- Limitations

- Open and Resolved Bugs

- MIB Support

- Obtaining Documentation and Submitting a Service Request

Introduction

Several new hardware and software features are introduced for the Cisco Nexus 3548 switch to improve the performance, scalability, and management of the product line. Cisco NX-OS Release 6.0 also supports all hardware and software supported in Cisco NX-OS Release 5.1 and Cisco NX-OS Release 5.0.

Cisco NX-OS 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 that run 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 that is 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 3500 Series Switches

The Cisco Nexus 3500 platform is an extension of the Cisco Nexus 3000 Series of 100M, 1, 10, and 40 Gigabit Ethernet switches built from a switch-on-a-chip (SoC) architecture. Switches in the Cisco Nexus 3500 series include Algorithm Boost (or Algo Boost) technology that is built into the switch application-specific integrated circuit (ASIC). Algo Boost allows the Cisco Nexus 3548 switch to achieve Layer 2 and Layer 3 switching latencies of less than 200 nanoseconds (ns). In addition, Algo Boost contains several innovations for latency, forwarding features, and performance visibility, including two configurable modes for low latency:

- Normal mode: This mode is suitable for environments needing low latency and high scalability.

- Warp mode: This mode consolidates forwarding operations within the switching ASIC, lowering latency by up to an additional 20 percent compared to normal operation.

Active buffer monitoring accelerates the collection of buffer utilization data in hardware, allowing significantly faster sampling intervals. Even on the lowest-latency switches, data packets can incur a millisecond or more of latency during periods of congestion. Previous buffer utilization monitoring techniques were based entirely on software polling algorithms with polling with higher polling intervals that can miss important congestion events.

Cisco Nexus 3548 Switch

The Cisco Nexus 3548 switch is the first member of the Cisco Nexus 3500 platform. As a compact one-rack-unit (1RU) form-factor 10 Gigabit Ethernet switch, the Cisco Nexus 3548 switch provides line-rate Layer 2 and Layer 3 switching at extremely low latency. The switch runs Cisco NX-OS software that has comprehensive features and functions that are widely deployed globally. The Cisco Nexus 3548 contains no physical layer (PHY) chips, which allows low latency and low power consumption. The switch supports both forward and reversed airflow and both AC and DC power inputs.

Cisco Nexus 3524 Switch

The Cisco Nexus 3524 switch is a Cisco Nexus 3548 switch, but with only 24 ports active and can be upgraded to use all 48 ports. As a compact one-rack-unit (1RU) form-factor 10 Gigabit Ethernet switch, the Cisco Nexus 3548 switch is the lowest entry point for main-stream top-of-rack (TOR) data center deployments which offers line-rate Layer 2 and Layer 3 switching with a comprehensive feature set, including Algo Boost technology, and ultra-low latency.

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System Requirements

This section includes the following topics:

- Memory Requirements

- Hardware Supported

Memory Requirements

The Cisco NX-OS Release 6.0(2)A6(1) software requires 203 MB of flash memory.

Hardware Supported

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shows the hardware supported by Cisco NX-OS Release 6.0(2)A6(1) software.

Table 2 Hardware Supported by Cisco NX-OS Release 6.0(2)A6(1) Software

Hardware

Part Number

Supported Software Release

Cisco Nexus 3500 Series

Cisco Nexus 3548 switch

N3K-C3548P-10G

5.0(3)A1(1) and later releases

Cisco Nexus 3548x switch, 48 SFP+

N3K-C3548P-10GX

6.0(2)A6(1) and later releases

Cisco Nexus 3524 switch

N3K-C3524P-10G

6.0(2)A6(1) and later releases

Cisco Nexus 3524 switch, 24 SFP+

N3K-C3524P-10GX

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 individual fan, forward airflow (port side exhaust

NXA-FAN-30CFM-F

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 individual fan, reversed airflow (port side intake)

NXA-FAN-30CFM-B

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 400W AC power supply, forward airflow (port side exhaust)

N2200-PAC-400W

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 400W AC power supply, reversed airflow (port side intake)

N2200-PAC-400W-B

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 400W DC power supply, forward airflow (port side exhaust)

N2200-PDC-400W

5.0(3)A1(1) and later releases

Cisco Nexus 2000 or Nexus 3000 350W DC power supply, reversed airflow (port side intake)

N3K-PDC-350W-B

5.0(3)A1(1) and later releases

Transceivers

10-Gigabit

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

SFP-10G-ZR

6.0(2)A3(1) and later releases

10GBASE-CU SFP+ cable 1.5 m (Twinax cable)

SFP-H10GB-CU1-5M

6.0(2)A3(1) and later releases

10GBASE-CU SFP+ cable 2 m (Twinax cable)

SFP-H10GB-CU2M

6.0(2)A3(1) and later releases

10GBASE-CU SFP+ cable 2.5 m (Twinax cable)

SFP-H10GB-CU2-5M

6.0(2)A3(1) and later releases

Active optical cable 1 m

SFP-10G-AOC1M

6.0(2)A3(1) and later releases

Active optical cable 3 m

SFP-10G-AOC3M

6.0(2)A3(1) and later releases

Active optical cable 5 m

SFP-10G-AOC5M

6.0(2)A3(1) and later releases

Active optical cable 7 m

SFP-10G-AOC7M

6.0(2)A3(1) and later releases

10GBASE-DWDM long-range transceiver module 80 km with single mode duplex fiber

DWDM-SFP10G-C

6.0(2)A3(1) and later releases

10GBASE-DWDM long-range transceiver module 80 km with single mode duplex fiber

DWDM-SFP10G

6.0(2)A1(1) and later releases

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

SFP-10G-SR

5.0(3)A1(1) and later releases

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

SFP-10G-LR

5.0(3)A1(1) and later releases

Cisco 10GBASE-ER SFP+ Module for SMF

SFP-10G-ER

5.0(3)A1(1) and later releases

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

SFP-H10GB-CU1M

5.0(3)A1(1) and later releases

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

SFP-H10GB-CU3M

5.0(3)A1(1) and later releases

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

SFP-H10GB-CU5M

5.0(3)A1(1) and later releases

Active Twinax cable assembly, 7 m

SFP-H10GB-ACU7M

5.0(3)A1(1) and later releases

Active Twinax cable assembly, 10 m

SFP-H10GB-ACU10M

5.0(3)A1(1) and later releases

1-Gigabit Ethernet

1000BASE-T SFP

GLC-TE

6.0(2)A3(1) and later releases

Gigabit Ethernet SFP, LC connector EX transceiver (MMF)

GLC-EX-SMD

6.0(2)A3(1) and later releases

Gigabit Ethernet SFP, LC connector ZX transceiver (MMF)

GLC-ZX-SMD

6.0(2)A3(1) and later releases

1000BASE-T SFP

GLC-T

6.0(2)A1(1) and later releases

Gigabit Ethernet SFP, LC connector SX transceiver (MMF)

GLC-SX-MM

5.0(3)A1(1) and later releases

Gigabit Ethernet SFP, LC connector SX transceiver (MMF)

GLC-SX-MMD

5.0(3)A1(1) and later releases

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

GLC-LH-SM

5.0(3)A1(1) and later releases

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

GLC-LH-SMD

5.0(3)A1(1) and later releases

100-Megabit Ethernet

1000BASE-T SFP transceiver module with extended operating temperature range

SFP-GE-T

6.0(2)A3(1) and later releases

100BASE-FX SFP module for Gigabit Ethernet ports GLC-GE-100FX

GLC-GE-100FX

6.0(2)A3(1) and later releases

New and Changed Features

This section describes the new features introduced in Cisco NX-OS Release 6.0(2)A6(1). This section includes the following topics:

- New Supported Hardware

- New Software Features

New Supported Hardware

Cisco NX-OS Release 6.0(2)A6(1) includes the following:

- Nexus 3548X - Support for the Nexus 3548X platform has been added for this release.

- Nexus 3524X - Support for the Nexus 3524X platform has been added for this release.

New Software Features

Cisco NX-OS Release 6.0(2)A6(1) includes the following new software feature.

- Regular mode multicast service reflection- In regular mode, packets incoming as S1,G1 are translated to S2,G2, and the destination MAC address of the outgoing packets will have the Multicast mac address corresponding to the translated group G2.

Note The regular mode multicast service reflection feature is only supported on 3528X and 3524X.

Upgrade and Downgrade Guidelines

Upgrade Path to Cisco NX-OS Release 6.x

If a custom CoPP policy is applied after upgrading to Cisco NX-OS Release 6.0(2)A1(1) or later, and if the Nexus 3548 switch is downgraded to Cisco NX-OS Release 5.0, where changes to the CoPP policy are not permitted, the custom CoPP policy is retained and cannot be modified.

Limitations

The following are the known limitations for Cisco NX-OS Release 6.0(2)A6(1):

- BFD echo mode is not supported if the enabled devices are connected through a Nexus 3548 switch (See CSCup33091 ).

- IGMP packets, which are filtered by report policies on the local switch on which IGMP filtering is enabled, will still get forwarded to the peer switch (See CSCup50141 ).

- Counters for the warp SPAN destination port do not work. To check these counters, connect another switch to the destination ports (See CSCup66372 ).

- In a vPC setup, because of a hardware limitation, non-RPF traffic for (S,G) that comes in on the RPF interface for (*,G) hits the (*,G) entry instead of being treated as (S,G) non-RPF traffic and dropped. (S,G) non-RPF traffic is then incorrectly forwarded by (*,G) entry, thus causing traffic duplication. To avoid duplication of Layer 3 multicast traffic by sending the (S,G) RP-bit prune, run the ip pim pre-build-spt command (See CSCun34760 ).

- While performing Online Insertion Removal (OIR) on the cable or optics of a 40G bundle, you must perform the following sequence of steps for the OIR to be successful (See CSCuq93225 ):

1. Disable (shut) the 40G port

2. Change the speed from 40G to 10G

3. Perform an OIR on the cable or optics

4. Change the speed from 10G to 40G

5. Re-enable (no shut) the port

Open and Resolved Bugs

. This web-based tool provides you with access to the Cisco bug tracking system, which maintains information about bugs and vulnerabilities in this product and other Cisco hardware and software products.

Note You must have a Cisco.com account to log in and access the Cisco Bug Search Tool. if you do not have one, you can register for an account.

.

This section includes the following topics:

- Resolved Bugs in this Release

- Open Bugs for this Release

Resolved Bugs in this Release

lists the resolved caveats in the Cisco NX-OS Release 6.0(2)A6(1) release. Click the bug ID to access the Bug Search tool and see additional information about the bug.

Table 3 Resolved Caveats in Cisco NX-OS Release 6.0(2)A6(1)

Bug ID

Description

CSCuo52751

A Nexus 3500 Series Switch configured with WARP SPAN may see continuously incrementing CRCs on the WARP SPAN destination interfaces.

CSCuq79332

This defect is to remove the hardware multicast hw-hash CLI from Nexus 3000/3500 releases as this command is not supported in these platforms.

CSCuq89189

Nexus 3500 running 6.0(2)A1(1) is configured hardware profile forwarding-mode warp; hence, after the upgrade to 6.0(2)A3(1), configuration is reverted back to hardware profile forwarding-mode normal, and it needs to reconfigure Warp, which takes another reload to fix it.

CSCur20115

In Nexus 3500 vPC setup, switch drop ARP (reply) packets are destined to the peer's physical mac-address.

CSCur83153

After some time of normal operation, Nexus Data Broker (NDB) is suddenly no longer reachable through the GUI.

CSCus14933

Following log is displayed:

%USER-2-SYSTEM_MSG: unknown enum 254 - vsh

CSCus21870

The N3500 buffer monitor syslog may stop working.

CSCus32908

Cannot see hardware profile buffer monitor in the running-config.

CSCus75034

No IGMP reports are leaked over the Backup Standby Port in Flexlink configuration when Mcast fast convergence is configured. No IGMP snooping entry is created on the upstream switch for the port connecting to the Backup port on the N3500 side. This would lead to high Mcast convergence when Active Port goes down and Standby port becomes active as the upstream switch would not be forwarding multicast traffic for the hosts connected on the N3500.

CSCus87502

Python is broken in the Nexus 3548.

CSCus89127

When a change performed on one of the interfaces on N3K, which affects PTP on this interface, it may affect PTP on other interfaces on this switch.

Open Bugs for this Release

for details about the bug.

Table 4 Cisco NX-OS Release 6.0(2)A6(1)—Open Bugs

Record Number

Open Bug Headline

CSCuq01107

Traffic flooded when VPC Po is down with a static MAC entry configured for it.

CSCuq41497

BFD/HSRP traffic does not go through the CISCO Nexus 3548 switch because BFD echo packets are dropped due to a hardware limitation.

CSCuq89687

40G Spirent test center connected port sometimes goes to linkFlapErrDisabled.

CSCus91536

The Multicast Service Reflection feature uses a hardware loopback port, defined by the CLI hardware profile multicast service-reflect port x. As of current implementation, CDP displays an entry for this interface, indicating a loopback. This entry should be ignored for operational purposes.

CSCut09309

On the Cisco N3500 platform, the PowerOn Auto Provisioning (POAP) mode does not work in USB2 slot.

CSCut18256

OpenFlow does not work on Nexus 3548X platforms.

MIB Support

The Cisco Management Information Base (MIB) list includes Cisco proprietary MIBs and many other Internet Engineering Task Force (IETF) standard MIBs. These standard MIBs are defined in Requests for Comments (RFCs). To find specific MIB information, you must examine the Cisco proprietary MIB structure and related IETF-standard MIBs supported by the Cisco Nexus 3548 switch. The MIB Support List is available at the following FTP sites:

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 following 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

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Obtaining Documentation and Submitting a Service Request

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