Cisco Nexus 3548 Switch NX-OS Release Notes, Release 6.0(2)A1(1a)
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Table of Contents
Cisco Nexus 3548 Series NX-OS Release Notes, Release 6.0(2)A1(1a)
Cisco Nexus 3500 Series Switches
Upgrade and Downgrade Guidelines
Upgrade Path to Cisco NX-OS Release 6.x
Resolved Caveats in Cisco NX-OS Release 6.0(2)A1(1a)
Open Caveats in Cisco NX-OS Release 6.0(2)A1(1a)
Obtaining Documentation and Submitting a Service Request
Cisco Nexus 3548 Series NX-OS Release Notes, Release 6.0(2)A1(1a)
Part Number: OL-29566-02
Current Release: Cisco NX-OS Release 6.0(2)A1(1a)This document describes the features, caveats, and limitations for Cisco Nexus 3548 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 caveats. See the following website for the most recent version of the Cisco Nexus 3548 release notes: http://www.cisco.com/en/US/products/ps11541/prod_release_notes_list.html
Note Table 1 shows the online change history for this document.
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 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.
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
Cisco NX-OS Release 6.0(2)A1(1a) supports the Cisco Nexus 3500 Series switches. You can find detailed information about 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)A1(1) software.
New and Changed Features
This section describes the new features introduced in Cisco NX-OS Release 6.0(2)A1(1a). This section includes the following topics:
New Software Features
Cisco Nexus 3548 switches are supported by Cisco NX-OS Release 6.0(2)A1(1a). Cisco NX-OS interoperates with any networking operating system, including Cisco IOS software, that conforms to the networking standards listed in the product data sheet.
Cisco NX-OS Release 6.0(2)A1(1a) does not include new software features.
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
Cisco NX-OS Release 6.0(2)A1(1a) has the following limitation:
In Cisco NX-OS releases older than Cisco NX-OS Release 6.0(2)A1(1), you can use the ip igmp join-group command to bind a Nexus 3548 switch to a multicast group. The switch generates an Internet Group Management Protocol (IGMP)-join for the specified group, and any multicast packets destined to the group are sent to the CPU. If there are receivers connected to the Nexus 3548 switch, which request for the group, then a copy of the packet is also sent to the receiver.
In Cisco NX-OS Release 6.0(2)A1(1) and higher releases, you cannot use the ip igmp join-group command to program any Outgoing Interface Lists (OILs) in the hardware. Even if there are receivers that request for the stream, no packets are sent to them. To bind a Nexus 3548 switch to a multicast group, use the ip igmp static-oif command instead of the ip igmp join-group command.
You can use the ip igmp join-group command only if the ip routing multicast enforce-rpf command, which is hidden, is enabled. This command can only be enabled if LISP is not in use, and LISP is not available on Nexus 3548 switches.
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 in Cisco NX-OS Release 6.0(2)A1(1a)
- Open Caveats in Cisco NX-OS Release 6.0(2)A1(1a)
Resolved Caveats in Cisco NX-OS Release 6.0(2)A1(1a)
Table 3 lists descriptions of resolved caveats in Cisco NX-OS Release 6.0(2)A1(1a). The record ID links to the Cisco Bug Toolkit where you can find details about the caveat.
Open Caveats in Cisco NX-OS Release 6.0(2)A1(1a)
Table 1-4 lists open caveats in Cisco NX-OS Release 6.0(2)A1(1a). The record ID links to the Cisco Bug Toolkit, where you can find details about the caveat.
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:
ftp://ftp.cisco.com/%2Fpub/mibs/supportlists/nexus3548/Nexus3548MIBSupportList.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
The documentation set is divided into the following categories:
The release notes are available at the follwing URL:
http://www.cisco.com/en/US/products/ps11541/prod_release_notes_list.html
Installation and Upgrade Guides
The installation and upgrade guides are available at the following URL:
http://www.cisco.com/en/US/products/ps11541/prod_installation_guides_list.html
The command references are available at the following URL:
http://www.cisco.com/en/US/products/ps11541/prod_command_reference_list.html
The technical references are available at the following URL:
http://www.cisco.com/en/US/products/ps11541/prod_technical_reference_list.html
The configuration guides are available at the following URL:
http://www.cisco.com/en/US/products/ps11541/products_installation_and_configuration_guides_list.html
The system message reference guide is available at the following URL:
http://www.cisco.com/en/US/products/ps11541/products_system_message_guides_list.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
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