Cisco Nexus 3500 Series NX-OS Release Notes, Release 6.0(2)A8(7)

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.

Table 1 shows the online change history for this document.

Table 1. Online History Change

Date

Description

September 09, 2017

Created NX-OS Release 6.0(2)A8(7) release notes.

September 20, 2017

Added the updated list of NX-API commands.

November 10, 2017

Added CSCvg46574 to the list of resolved caveats.

Contents

Introduction

System Requirements

New and Changed Information

Caveats

Upgrade Path to Cisco NX-OS Release 6.x

Limitations

Best Practices

MIB Support

Documentation Feedback

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.

This section includes the following topics:

■        Cisco Nexus 3500 Series Switches

■        Cisco Nexus 3548 Switch

■        Cisco Nexus 3524 Switch

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.

For information about the Cisco Nexus 3500 Series, see the Cisco Nexus 3500 Series Hardware Installation Guide.

System Requirements

This section includes the following topics:

■        Hardware Supported

Hardware Supported

Cisco NX-OS Release 6.0(2)A8(7) supports the Cisco Nexus 3500 Series switches. You can find detailed information about the supported hardware in the Cisco Nexus 3500 Series Hardware Installation Guide.

Table 2 shows the hardware supported by Cisco NX-OS Release 6.0(2)A8(7) software.

Table 2. Hardware Supported by Cisco NX-OS Release 6.0(2)A8(7) 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-SR SFP+ module (multimode fiber [MMF])

SFP-10G-SR-S

6.0(2)A8(2) and later releases

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

SFP-10G-LR-S

6.0(2)A8(2) and later releases

Cisco 10GBASE-ER SFP+ Module for SMF

SFP-10G-ER-S

6.0(2)A8(2) and later releases

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

SFP-10G-ZR-S

6.0(2)A8(2) 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 Information

This section lists the new and changed features in Release 6.0(2)A8(7).

■        New Supported Hardware

■        New Software Features

■        NX-API Commands

New Supported Hardware

Cisco NX-OS Release 6.0(2)A8(7) does not include any new hardware.

New Software Features

Cisco NX-OS Release 6.0(2)A8(7) includes the following new software feature:

·         Support for unicast and multicast PTP management messages.

NX-API Commands

Cisco NX-OS Release 6.0(2)A8(7) supports the following commands for NX-API:

·         show bgp ip unicast

·         show bgp ip unicast <route>

·         show bgp ip unicast vrf all

·         show bgp ip unicast vrf <non-defalt vrf>

·         show bgp ip unicast nexthop <>

·         show bgp ip unicast nexthop <> vrf <>

·         show bgp ip unicast neighbors

·         show bgp ip unicast neighbors vrf <>

·         show bgp ip unicast summary

·         show bgp ip unicast summary vrf <>

·         show hardware profile buffer monitor detail last x

·         show  ip route "prefix"

·         show ip route summary

·         show ip route vrf "vrfid"

·         show ip route vrf all

·         show ip route summary vrf "vrfid"

·         show ip route "prefix" vrf "vrfid"

·         show ip ospf neighbors

·         show ip ospf neighbors vrf <>

·         show ip ospf database

·         show ip ospf database vrf <>

·         show ip ospf vrf all

·         show ip ospf vrf <>

·         show ip ospf interface

·         show ip ospf interface vrf <>

·         show ip ospf interface brief <>

·         show ip ospf interface brief vrf <>

·         show ip ospf interface ethernet <>

·         show ip ospf interface loopback <>

·         show ip ospf interface po <>

·         show ip ospf interface vlan <>

·         show ip ospf interface ethernet vrf <>

·         show ip ospf interface loopback vrf <>

·         show ip ospf interface po vrf <>

·         show ip ospf interface vlan vrf <

·         show route-map "rmap"

·         show route-map

·         show ip mroute

·         show ip mroute vrf all

·         show ip mroute vrf x

·         show ip mroute summary

·         show ip mroute source-tree summary

·         show ip mroute shared-tree summary

·         show ip pim neighbor

·         show ip pim rp

·         show ip pim route

·         show ip pim group-range

·         show ip pim df

·         show ip pim interface

·         show port-channel summary

·         show port-channel traffic

·         show vpc brief

·         show vpc consistency-parameters global

·         show ip interface brief

·         show ip interface <ip>

·         show ip interaface operational

·         show interface brief

·         show interface vlan

·         show interface status

·         show int mac-address

·         show int mgmt. brief

·         show int counters

·         show int description

·         show int switchport

·         show environment

·         show environment fan

·         show environment fan detail

·         show environment power

·         show environment power input

·         show environment temperature

·         show ip arp

·         show ip arp detail

·         show ip arp vrf <>

·         show inventory

·         show running-config

·         show vlan id <>

·         show vlan

·         show show mac address-table  aging-time

·         show mac address-table count

·         show spanning-tree

·         show spanning-tree vlan <>

·         show spanning-tree interface <>

·         mac address-table vlan

·         show mac address-table static

·         show mac address-table dynamic

·         show lldp neighbors

·         show lldp neighbors detail

·         show lldp neighbors interface ethernet 1/x detail

Caveats

The open and resolved bugs for this release are accessible through the Cisco Bug Search Tool. 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.

For more information about the Cisco Bug Search Tool, see the Bug Search Tool Help & FAQ.

This section includes the following topics:

■        Resolved Bugs for this Release

■        Open Bugs for this Release

Resolved Bugs for this Release

Table 3 lists descriptions of resolved bugs in Cisco NX-OS Release 6.0(2)A8(7). You can use the record ID to search Cisco Bug Search Tool for details about the bug.

Table 3 Cisco NX-OS Release 6.0(2)A8(7) – Resolved Bugs

Record Number

Description

CSCvc60223

Configuring IP NAT inside/outside, causes the routing protocols to go down.

CSCvd96992

Multicast NAT translation fails for the same source translation.

CSCve39704

The MAC address of the router of the peer is learnt dynamic from one of the legs of the vPC.

CSCve61412

Auto-recovery of the vPC does not kick in after replacing the startup-config, reloading peers and one device fails to come up.

CSCve88007

The route-map breaks if the BGP neighbor is removed and re-added with a different ASN.

CSCve89395

Duplication of multicast packets on the receiver is seen when there is a change in the routing and RPF interface on LHR for (*,G).

CSCve91406

The NX-API output for the BGP table is parsed incorrectly on the Cisco Nexus 3548 switch.

CSCve96924

Cisco Nexus 3500 Series switches do not forward PTP management packets.

CSCve97676

Although the address-family ipv4 multicast path is available in URIB, it is invalid in BGP.

CSCvf00752

The Cisco Nexus 3500 Series switches may stop processing the multicast traffic and lose the (S,G) entry when the IGMP host-proxy feature is used.

CSCvf02296

Cisco Nexus 3500 Series switches could duplicate the multicast traffic to the receiver in specific topologies due to the forwarding traffic

CSCvf18971

The output of the show ip interface brief include-secondary  NX-OS REST API does not correctly display all configured IP addresses.

CSCvf18974

The output of the show ip interface vrf all NX-OS REST API does not correctly display all configured IP addresses.

CSCvf24594

The name resolution (DNS) does not resolve in the management VRF for POAP.

CSCvf28477

The show ip mroute summary displays a spurious jump in the bite rate.

CSCvf29916

The OIFL on the secondary RP is not getting removed or updated upon bringing the primary RP.

CSCvf34272

The (S,G) expiry timer is not updated when the SPT-Threshold infinity is configured on the converging intermediate device.

CSCvf37359

Mac relearning does not occur during the mac move from orphan on one vPC to other.

CSCvf54121

While sending Json-rpc requests, it randomly fails with multiple different error codes.

CSCvf59238

The S,G entries are stuck in the MRIB when the multicast scale limit is crossed and reduced.

CSCvf59327

The show ip pim route internal detail output does not show the NAT S1,G1/S2,G2 entries as data created.

CSCvf61995

When prunes are received for some S2,G2 flows, the S1,G1 multicast traffic is forwarded out of OIL unnated.

CSCvf64623

Although the PTP feature is disabled on the Cisco Nexus 3548 series switch, an S, G entry for the multicast PTP sources is not created.

CSCvg46574

If the NAT feature is enabled When you upgrade to Cisco NX-OS Release 6.0(2)A8(7), the NAT configuration gets duplicated under interfaces.

CSCuq98645

Support for Soft Parity Error Auto-Recovery.

CSCum52019

When the multicast source is stopped and restarted, the S, G states are not created on the Cisco Nexus 3548 switch.

Open Bugs for this Release

Table 3 lists descriptions of open bugs in Cisco NX-OS Release 6.0(2)A8(7). You can use the record ID to search Cisco Bug Search Tool for details about the bug.

Table 4 Cisco NX-OS Release 6.0(2)A8(7) – Open Bugs

Record Number

Description

CSCvf59081

When the ACL with the log option matching the flow is applied on the RPF incoming interface, multicast S and G entries are not created in MRIB.

CSCvf75485

When there are more than 18 ECMP paths, ECMP NAT fails for dynamic twice NAT.

CSCvf91189

The Address family name is missing under "Neighbor capabilities" and "Graceful Restart Parameters" in JSON for the show bgp ip unicast neighbor NX-API command.

CSCvf92702

Issues seen with show ip interface vrf all | json-pretty output

CSCvf93942

Some issues are visible in the JSON output for the following NX-API commands:

·         show bgp ip unicast nexthop <>

·         show bgp ip unicast

·         show bgp ip unicast vrf all

·         show bgp  ip unicast vrf <>

CSCvf94197

DR State key is missing for the show ip ospf neighbor (in JSON output) NX-API command.

CSCvf94810

The time stamp is not in displayed in the PT format for the JSON output of the show hsrp NX-API command.

CSCvf94192

JSON issues with show ip pim rp | json-pretty NX-API command.

CSCvf94468

The show hardware profile buffer monitor NX-API command displays some issues in the JSON output.

CSCvf94615

The show ip route summary NX-API command does not give the backup path in the JSON output when the path is none.

Upgrade Path to Cisco NX-OS Release 6.x

Install All is the only option that supports upgrade and downgrade between releases. Upgrade from Releases 6.0(2)A1(1) or later to the NX-OS Release 6.0(2)A8(7) is supported.

The following limitations are applicable when you upgrade from Releases 6.0(2)A1(1) or later to the NX-OS Release 6.0(2)A8(7):

■        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.

■        You must disable the NAT feature prior to upgrading to Cisco NX-OS Release 6.0(2)A8(7).

Caution: Disabling the NAT feature will remove the NAT configuration from the Nexus switch and stop the NAT functionality. Hence, you must reapply the NAT configuration after reloading the Nexus switch.

■        copy r s and reload is not a supported method for an upgrade.

Limitations

The following are the known limitations for Cisco NX-OS Release 6.0(2)A8(7):

■        PBR and NAT cannot be supported on the same interface.

■        set ip default next hop cannot be applied in PBR.

■        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 CSCuq66372).

■        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

■        SSH/SCP sessions with Cisco Nexus 3500 series switches running 6.0(2)A8(x) release may fail with a "no matching cipher found" message. This failure is due to the weaker CBC ciphers getting deprecated for security reasons (See CSCun41202).

■        You must disable the NAT feature prior to upgrading to Cisco NX-OS Release 6.0(2)A8(7).

Caution: Disabling the NAT feature will remove the NAT configuration from the Nexus switch and stop the NAT functionality. Hence, you must reapply the NAT configuration after reloading the Nexus switch (See CSCvg46574).

Best Practices

The syntax of the poap_script.py file should be validated using the python validation tool before using the file for POAP. Otherwise, if the poap_script.py file is edited with a syntax error, the POAP process will exit without giving an error.

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 3000 Series switch. The MIB Support List is available at the following FTP sites:

ftp://ftp.cisco.com/pub/mibs/supportlists/nexus3000/Nexus3000MIBSupportList.html

Related Documentation

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

http://www.cisco.com/en/US/products/ps11541/tsd_products_support_series_home.html

Documentation Feedback

To provide technical feedback on this document, or to report an error or omission, please send your comments to nexus3k-docfeedback@cisco.com. We appreciate your feedback.

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

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)

© 2017 Cisco Systems, Inc. All rights reserved.