Cisco Nexus 3548 Series NX-OS Release Notes, Release 6.0(2)A3(1)
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)A3(1)
Open Caveats in Cisco NX-OS Release 6.0(2)A3(1)
Obtaining Documentation and Submitting a Service Request
Part Number: OL-29566-07
Current Release: Cisco NX-OS Release 6.0(2)A3(1)
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/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.
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:
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:
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.
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.
This section includes the following topics:
Cisco NX-OS Release 6.0(2)A3(1) 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.
This section describes the new features introduced in Cisco NX-OS Release 6.0(2)A3(1). This section includes the following topics:
A virtual port channel (vPC) allows links that are physically connected to two different Cisco Nexus devices to appear as a single port channel by a third device. The third device can be a switch, server, or any other networking device. A vPC can provide multipathing, which allows you to create redundancy by enabling multiple parallel paths between nodes and load balancing traffic where alternative paths exist.
Flex Links are a pair of a Layer 2 interfaces (switch ports or port channels) where one interface is configured to act as a backup to the other. The feature provides an alternative solution to the Spanning Tree Protocol (STP).
Cisco NX-OS Release 6.0(2)A3(1) introduces pool support for dynamic NAT. Dynamic NAT allows the configuration of a pool of global addresses that can be used to dynamically allocate a global address from the pool for every new translation. The addresses are returned to the pool after the session ages out or is closed. This allows for a more efficient use of addresses based on requirements.
Support for PAT includes the use of the global address pool.
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.
The following are the known limitations for Cisco NX-OS Release 6.0(2)A3(1):
vPC on Cisco Nexus 3548 switches does not support PIM BIDR. To stop IGMP OIFS from timing out periodically, remove the BIDR configuration from vPC peer switches (See CSCun11362).
Ensure that you remove the PTP feature before downgrading from Cisco NX-OS Release 6.0(2)A3(1) to Cisco NX-OS Release 5.0(3)A1(1) (See CSCun15923).
Open and resolved caveat record numbers are provided with links to the Bug Search page where you can find details about each caveat.
This section includes the following topics:
Table 3 lists descriptions of resolved caveats in Cisco NX-OS Release 6.0(2)A3(1). The record ID links to the Cisco Bug Search page where you can find details about the caveat.
Table 1-4 lists open caveats in Cisco NX-OS Release 6.0(2)A3(1). The record ID links to the Cisco Bug Search page, where you can find details about the caveat.
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
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
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.
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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