Several new hardware and software features are introduced for the Cisco Nexus 3000 Series and Cisco Nexus 3100 Series devices to improve the performance, scalability, and management of the product line. Cisco NX-OS Release 6.x 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 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 Quad Small Form-Factor Pluggable (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, one 100/1000 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 Cisco NX-OS software.
The Cisco Nexus 3100 Series switches are high-performance, high-density, ultra-low-latency Ethernet switches that provide line-rate Layer 2 and Layer 3 switching. In Cisco NX-OS Release 6.0(2)U2(2), the Cisco Nexus 3100 Series includes the Cisco Nexus 3132 and Nexus 3172 switches.
The Cisco Nexus 3172PQ switch is a 10-Gbps Enhanced Small Form-Factor Pluggable (SFP+)–based ToR switch with 48 SFP+ ports and 6 Enhanced Quad SFP+ (QSFP+) ports.
The Cisco Nexus 3172TQ switch is a 10GBASE-T switch with 48 10GBASE-T ports and 6 Quad SFP+ (QSFP+) ports.
Each SFP+ port can operate in 100-Mbps, 1-Gbps, or 10-Gbps mode, and each QSFP+ port can operate in native 40-Gbps or 4 x 10-Gbps mode. This switch is a true physical-layer-free (phy-less) switch that is optimized for low latency and low power consumption.
The Cisco Nexus 3132Q switch is a 1RU, 40-Gbps QSFP-based switch that supports 32 fixed 40-Gbps QSFP+ ports. It also has 4 SFP+ ports that can be internally multiplexed with the first QSFP port. Each QSFP+ port can operate in the default 40-Gbps mode or 4 x 10-Gbps mode, up to a maximum of 104 10-Gbps ports.
Each switch includes dual redundant power supply units, four redundant fans, one 10/100/1000 management port, and one console port. Each switch can be ordered with either forward (port-side exhaust) airflow or reverse (port-side intake) airflow for cooling. It supports both AC and DC power supplies. All combinations of power (AC/DC) and airflow (forward/reverse) are available. The Cisco Nexus 3100 Series switches run the Cisco NX-OS software.
2.OIR is supported for all optical modules and transceivers in Cisco NX-OS Release 6.02 and later releases.
3.Supported on the Cisco Nexus 3016, Cisco Nexus 3064-X, Cisco Nexus 3064-TQ, Cisco Nexus 3064, Cisco Nexus 3064-E, and all Cisco Nexus 3100 Series switches.
4.Supported on the Cisco Nexus 3064-E and Cisco Nexus 3064-X switches.
5.Supported on the Cisco Nexus 3048, Cisco Nexus 3064-X, Cisco Nexus 3064, and Cisco Nexus 3064-E switches.
6.Supported on the Cisco Nexus 3048, Cisco Nexus 3064-E, and Cisco Nexus 3064-X switches. Not supported on Cisco Nexus 3132Q-X
7.Supported on the Cisco Nexus 3064, Cisco Nexus 3064-E, and Cisco Nexus 3064-X switches. For the GLC-GE-100FX, only part number 10-2019-02 is supported.
Note The Cisco Nexus 3000 supports 1,000 and 10,000 speeds while using SFP+ with Cisco QSA [CVR-QSFP-SFP10G] (and a maximum of 6 QSAs). The 100 speed is not supported on the SFP+ along with QSA, but using any speed 100 is supported on the SFP+.
Table 5 Transceivers Supported by Cisco NX-OS Release 5.x Software
8.Supported on the Cisco Nexus 3016, Cisco Nexus 3064-X, Cisco Nexus 3064-TQ, Cisco Nexus 3064, and Cisco Nexus 3064-E switches.
9.Supported on the Cisco Nexus 3064-E and Cisco Nexus 3064-X switches.
10.Supported on the Cisco Nexus 3048, Cisco Nexus 3064-X, Cisco Nexus 3064, and Cisco Nexus 3064-E switches.
11.Supported on the Cisco Nexus 3048, Cisco Nexus 3064-E, and Cisco Nexus 3064-X switches.
12.GLC-SX-MMD is supported on all Cisco Nexus 3000 Series Switches except for the Cisco Nexus 3064-T. Please refer to the comparability matrix for all the supported platforms.
13.Supported on the Cisco Nexus 3064, Cisco Nexus 3064-E, and Cisco Nexus 3064-X switches. For the GLC-GE-100FX, only part number 10-2019-02 is supported.
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 copper SFP+ twinax, QSFP+ twinax, and QSFP+ splitter cables on Cisco Nexus 3000 Series switches.
If the attached interconnect (transceiver) is a copper SFP+ twinax or QSFP+ twinax cable:
Verify the transceiver SPROM to match the Cisco magic code.
If the check succeeds, bring up the interface. Otherwise, print the following warning message appears stating that a non-Cisco transceiver is attached and that you should 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.
If the attached transceiver is a QSFP+ splitter cable, then no special check is performed. The Cisco NX-OS software tries to bring up the port.
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.
The Cisco QSFP 40-Gbps Bidirectional (BiDi) transceiver is a short-reach pluggable optical transceiver with a duplex LC connector for 40-GbE short-reach data communications and interconnect applications by using multimode fiber (MMF). The Cisco QSFP 40-Gbps BiDi transceiver offers a solution that uses existing duplex MMF infrastructure for 40-GbE connectivity. With the Cisco QSFP 40-Gbps BiDi transceiver, customers can upgrade their network from 10-GbE to 40-GbE without incurring any fiber infrastructure upgrade cost. The Cisco QSFP 40-Gbps BiDi transceiver can enable 40-GbE connectivity in a range of up to 100 meters over OM3 fiber, which meets most data center reach requirements. It complies with the Multiple Source Agreement (MSA) QSFP specification and enables customers to use it on all Cisco QSFP 40-Gbps platforms and achieve high density in a 40-GbE network. It can be used in data centers, high-performance computing (HPC) networks, enterprise and distribution layers, and service provider transport applications.
New and Changed Features
This section describes the new features introduced in Cisco NX-OS Release 6.0(2)U5(1). This section includes the following topics:
Cisco NX-OS Release 6.0(2)U5(1) does not include new hardware.
New Software Features
All Cisco Nexus 3000 Series switches are supported by Cisco NX-OS Release 6.0(2)U5(1). 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.
ERSPAN support for matching packets (up to 128 bytes) using User Defined Fields
ERSPAN support to SPAN dropped packets
Statistics support for ERSPAN/SPAN ACL
Support for displaying ERSPAN egress interface information for ERSPAN packets
Enhanced show tech-support command - The command was enhanced to include output of the show hardware internal buffer info pkt-stats, show policy-map int control-plane, show interface ethernet slot/port transceiver details, and show hardware internal buffer info pkt-stats port-log commands.
IP-in-IP decapsulation enabled.
VXLAN Ingress Replication - The show nve peers command is enhanced to display all the VXLAN network identifiers (VNIs) configured for a particular peer.
Egress RACLs on L3 Port Channels - A new guideline limitation stating that you cannot configure egress RACLs on L3 Port Channels.
IP-in-IP Decapsulation Enabled - Cisco Nexus 3000 Series switch drops all the packets when the feature tunnel is not configured, when the tunnel is configured but the tunnel interface is not configured, or the tunnel interface is in the shut down state.
LOU Thresholds - You can configure the LOU threshold to conserve the LOU registers and use TCAMs for expansions based on the threshold values.
Redirect HTTP methods - You can now intercept and redirect the specific HTTP methods to a server connected to a specific port.
Global knob for auto-negotiation disable - You can disable auto-negotiation on all 40G interfaces.
QSFP+ (40-Gb) transceiver - A new QSFP+ (40-Gb) transceiver is now supported on the Cisco Nexus 3000 Series switches. It has to be used in 4 x 10G mode with splitter cable and LR optics.
Burst traffic handling improvement - With the use of buffer pools and buffer modes, buffer handling is enhanced to have better burst absorption capability.
Enhancement to support zero queue-size to drop all packets on the queue - The queue-limit CLI under the queuing policy is enhanced to support zero egress queue size to drop all packets on the queue.
Configuring MPLS static - A feature that allows you to configure MPLS static labels.
SPAN/ERSPAN enhancements - The SPAN/ERSPAN enhancements include Egress interface support for ERSPAN source session, SPAN/ERSPAN ACL statistics, CPU port SPAN, SPAN source forward drop traffic, and SPAN ACL User Defined Field (UDF) match.
HTTP Put/Upload - You can now upload file into the HTTP server via default or management VRF interface.
Configuring VRRPv3 - Added support for configuring VRRPv3.
Hash offset and hash polynomial configuration - Added support for hash offset and hash polynomial configuration.
Support for new CLI default-information originate - A new CLI default-information originate is added to distribute the default static route from non-default VRF to all BGP (VRF) Virtual Router Context and to install that route in the local BGP route table for all the BGP VRFs.
Remove private autonomous system (AS) numbers - Added support for removing numbers.
Support for ALPM Mode 4 - Added support for ALPM Mode 4.
Default port mode - Starting with Release 6.0(2)U5(1), the default port mode on Cisco Nexus 3132Q and Cisco Nexus 3132CR Series switches after write erase is 32x40G mode.
Upgrade and Downgrade Guidelines
Ensure that you use the install all command to upgrade the switch software from one Cisco NX-OS release to another.
Upgrade Path to Release 6.0(2)U5(1)
Cisco Nexus 3000 Series switches that use software versions older than Cisco NX-OS Release 5.0(3)U5(1) need to be updated to Cisco NX-OS Release 5.0(3)U5(1) before they are upgraded to Cisco NX-OS Release 6.0(2).
Cisco NX-OS Release 5.0(3)U3(1) does not support a software upgrade from Cisco NX-OS Release 5.0(3)U2(2c). If you want to upgrade through this path, see CSCty75328 for details about how to work around this issue.
Note It is recommended that you upgrade to Cisco NX-OS Release 6.0(2)U5(1) by using Cisco NX-OS install procedures.
In Cisco NX-OS Release 5.0(3)U3(1), support for IPv6 has been added in Control Plane Policing (CoPP). To enable redirection of IPv6 control packets to the CPU, you must configure IPv6 CoPP on the system. Entering the write erase command on a device that runs Release 5.0(3)U3(1) automatically applies CoPP on the device and ensures that all IPv4 and IPv6-related CoPP configuration is set up 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.
In Cisco NX-OS Release 6.0(2)U2(2), the default interface name in LLDP MIB is in short form. To make it long form, you must set lldp portid-subtype to 1. In Cisco NX-OS Release 6.0(2)U2(3), this behavior was reversed. The default interface name in LLDP MIB is now in long form. To make it short form, you must set lldp portid-subtype to 0.
If you have set lldp port-subtype to 1 and you are upgrading to Cisco NX-OS Release 6.0(2)U2(4), ensure that you set lldp port-subtype to 0.
The following are the known limitations for Cisco NX-OS Release 6.0(2)U5(1):
While installing the NXAPI https certificate that is present in the device, the following error message can appear if the user does not have the permission to install this certificate (See CSCup72219):
After configuring the NXAPI feature, the default http port (port 80) is still in the listening state even after we run the no nxapi http command. This results in the sandbox becoming accessible. Although the sandbox becomes accessible, HTTP requests from the sandbox to the device do not go through. Thus, the functionality is not affected. (See CSCup77051).
Chunking is enabled while displaying XML output for any CLI, and html tags (& lt; and & gt;) are displayed instead of < and > both on the sandbox and while running the Python script (See CSCup84801).
This is expected behavior. Each chunk should be in XML format for you to parse it and extract everything inside the <body> tag. This is done so that it can be later concatenated with similar output from all the chunks of the CLI XML output. After all the chunks are concatenated to get the complete XML output for the CLI, this complete XML output can be parsed for any parameter.
The following workaround is recommended to address this issue:
– Concatenate the <body> outputs from each chunk
– Replace all the html tags (& lt; and & gt;) with < and >
– Parse for any XML tag needed
If you use the write erase command, you cannot view the output for the show startup feature command. To view the startup configuration, you must then use the show startup-config command. This limitation will remain until you run the copy running-config startup-config command. After that, the show startup-config feature command will display the feature-only configuration output as expected (See CSCuq15638).
A Python traceback is seen while running the show xml command by using the Python shell. The exception type is httplib.IncompleteRead. This happens when you use Python scripts to leverage the NXAPI for retrieving switch data through XML or JSON. You should handle the exceptions in your Python scripts (See CSCuq19257).
While upgrading to a new release, when you create a checkpoint without running the setup script, the checkpoint file does not contain the copp-s-mpls class. After you run the write erase command and reload the switch, the copp-s-mpls class is created when the default configuration is applied. When a rollback is done to this checkpoint file, it detects a change in the CoPP policy and tries to delete all class-maps. Because you cannot delete static class-maps, this operation fails and, in turn, the rollback also fails.
This can also happen if you create a checkpoint, then create a new user-defined class and insert the new class before any other existing class (See CSCup56505).
The following workarounds are recommended to address this issue:
– Run setup after upgrading to a new release.
– Always insert the new classes at the end before a rollback.
After an interface is shut down and restarted, and after the device is reloaded, the following are observed (See CSCuh69660):
– Any trunk port in the VLAN is treated as an IGMP snooping Active Port.
– Access ports in the VLAN are not treated as IGMP snooping Active ports.
– The FWM multicast flood-list for VLAN contains all trunk ports and mrouter ports.
The following workarounds are recommended to address this issue:
– Use the show ip igmp snooping vlan x command to see the Active Ports.
– Use the show platform fwm info vlan x command to see the flood-list.
When both the ip icmp-errors source and ip source intf icmp error commands are configured, then the command that is configured last takes effect.
Thereafter, if the last configured command is removed, the switch does not get configured with the command that was configured first.
Users who upgrade to 6.0(2)U5(1) need to run the set up script if they want to enable the MPLS static or the VRRpv3 feature.
Link Level Flow Control (LLFC) is not supported on Cisco Nexus 3000 series and Cisco Nexus 3100 series switches.
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.
When removing a BGP authentication password from a BGP prefix peer or a BGP prefix peer template, the following incorrect syslog error is given "BGP-3-MD5PASS: bgp-64200  Cannot set MD5 password for peer X.X.X.X". This is not a functional issue as the password is correctly removed.
Entering the copy ABC running command when the switch has a default/l2 CoPP profile and a file ABC has an L3 CoPP profile config, the PPS credit limit exceeded error is thrown for the copp-s-routingProto1 class-map.
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:
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