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Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Release Notes, Release 4.1(2)E1(1)

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Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Release Notes, Release 4.1(2)E1(1)

Table Of Contents

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Release Notes, Release 4.1(2)E1(1)

Contents

Introduction

System Requirements

Hardware Supported

Memory Requirements

Software Supported

Serviceability

Switched Port Analyzer

Ethanalyzer

Call Home

Online Diagnostics

Manageability

Simple Network Management Protocol

Role-Based Access Control

Cisco NX-OS Device Configuration Methods

Traffic Routing, Forwarding, and Management

Ethernet Switching

IP Multicast

FCoE Initialization Protocol

Quality of Service

Network Security Features

Limitations

Open Caveats

Related Documentation

Obtaining Documentation and Submitting a Service Request


Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Release Notes, Release 4.1(2)E1(1)


Date: October 15, 2009
Part Number: OL-20701-01 A0

This document describes the features, caveats, and limitations for Cisco NX-OS software for use on the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter. Use this document in combination with the documents listed in the "Related Documentation" 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 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Release Notes, Release 4.1(2)E1(1) release notes:
http://www.cisco.com/go/techdocs


Table 1 shows the online change history for this document.

Table 1 Online History Change 

Part Number
Revision
Date
Description

OL-20701-01

A0

October 15, 2009

Created release notes for
Cisco NX-OS Release 4.1(2)E1(1).


Contents

This document includes the following sections:

Introduction

System Requirements

Software Supported

Limitations

Open Caveats

Related Documentation

Obtaining Documentation and Submitting a Service Request

Introduction

The Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter (also referred to in this document as the switch) is a Layer 2 device, which runs Cisco NX-OS. The Cisco NX-OS Release 4.1(2)E1(1) software supports the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter including certain features that are specific to the product. The Cisco NX-OS software also interoperates with any networking operating system that conforms to the IEEE and RFC compliance standards.

The switch is a 10/1-Gb Ethernet switch for the IBM BladeCenter chassis. The switch offers a solution in high-end data centers where server virtualization and I/O consolidation are required.

System Requirements

This section includes the following topics:

Hardware Supported

Memory Requirements

Hardware Supported

The Cisco NX-OS software supports the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter. You can find detailed information about supported hardware in the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter Hardware Installation Guide.

Memory Requirements

The Cisco NX-OS software requires 2 GB of memory.

Software Supported

This section briefly describes the salient features supported in Cisco NX-OS Release 4.1(2)E1(1) for the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter. For detailed information about the features listed, see the documents listed in the "Related Documentation" section.

The Cisco NX-OS software provides a unified operating system that is designed to run all areas of the data center network including the LAN and Layer 4 through Layer 7 network services.

The Cisco NX-OS software also supports distributed multithreaded processing on symmetric multiprocessors (SMPs), multi-core CPUs, and distributed data module processors. The Cisco NX-OS software offloads computationally intensive tasks, such as hardware table programming, to dedicated processors distributed across the data modules. The modular processes are created on demand, each in a separate protected memory space. Processes are started and system resources are allocated only when you enable a feature. A real-time preemptive scheduler helps to ensure the timely processing of critical functions.

This section describes the key Cisco NX-OS software and includes the following topics:

Serviceability

Manageability

Traffic Routing, Forwarding, and Management

FCoE Initialization Protocol

Quality of Service

Network Security Features

Serviceability

The Cisco NX-OS software has serviceability functions that allow the device to respond to network trends and events. These features help you with network planning and improving response times.

This section includes the following topics:

Switched Port Analyzer

Ethanalyzer

Call Home

Online Diagnostics

Switched Port Analyzer

The Switched Port Analyzer (SPAN) feature allows you to analyze all traffic between ports (called the SPAN source ports) by nonintrusively directing the SPAN session traffic to a SPAN destination port that has an external analyzer attached to it.

Ethanalyzer

Ethanalyzer is a Cisco NX-OS protocol analyzer tool based on the Wireshark (formerly Ethereal) open source code. Ethanalyzer is a command-line version of Wireshark for capturing and decoding packets. You can use Ethanalyzer to troubleshoot your network and analyze the control-plane traffic.

Call Home

The Call Home feature continuously monitors hardware and software components to provide e-mail-based notification of critical system events. A versatile range of message formats is available for optimal compatibility with pager services, standard e-mail, and XML-based automated parsing applications. It offers alert grouping capabilities and customizable destination profiles.You can use this feature, for example, to directly page a network support engineer, send an e-mail message to a network operations center (NOC), and employ Cisco AutoNotify services to directly generate a case with the Cisco Technical Assistance Center (TAC).

Online Diagnostics

The Online Health Management System (OHMS) is a hardware fault detection and recovery feature. It ensures the general health of the switch.

Manageability

This section includes the following topics:

Simple Network Management Protocol

Role-Based Access Control

Cisco NX-OS Device Configuration Methods

Simple Network Management Protocol

The Cisco NX-OS software is compliant with Simple Network Management Protocol (SNMP) version 1, version 2, and version 3. A large number of MIBs is supported.

Role-Based Access Control

With role-based access control (RBAC), you can limit access to device operations by assigning roles to users. You can customize access and restrict it to the users who require it.

Cisco NX-OS Device Configuration Methods

You can configure devices using the CLI from a Secure Shell (SSH) session or a Telnet session. SSH provides a secure connection to the switch. You can also configure devices using the XML management interface, which is a programmatic method based on the NETCONF protocol that complements the CLI.

Traffic Routing, Forwarding, and Management

This section includes the following topics:

Ethernet Switching

IP Multicast

Ethernet Switching

The Cisco NX-OS software supports high-density, high-performance Ethernet systems and provides the following Ethernet switching features:

IEEE 802.1D-2004 Rapid and Multiple Spanning Tree Protocols (802.1w and 802.1s)

IEEE 802.1Q VLANs and trunks

512-subscriber VLANs

IEEE 802.3ad link aggregation

Private VLANs

Unidirectional Link Detection (UDLD) in aggressive and standard modes

IP Multicast

The Cisco NX-OS includes the following multicast protocols and functions:

Internet Group Management Protocol (IGMP) Versions 1, 2, and 3 router role

IGMPv2 host mode

IGMP snooping

FCoE Initialization Protocol

The Cisco NX-OS supports the FIP snooping bridge feature. The switch operates as a loss-less Ethernet bridge transparently forwarding FCoE packets.

Quality of Service

The Cisco NX-OS quality of service (QoS) support allows you to classify the network traffic, police and prioritize the traffic flow, and provide congestion avoidance.

Network Security Features

Cisco NX-OS includes the following security features:

Authentication, authorization, and accounting (AAA)

RADIUS and TACACS+

SSH Protocol Version 2

SNMPv3

Policies based on MAC and IPv4 addresses supported by named ACLs (port-based ACLs [PACLs], VLAN-based ACLs [VACLs])

Traffic storm control (unicast, multicast, and broadcast)

Limitations

This section describes the limitations in Cisco NX-OS Release 4.1(2)E1(1) for the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter.

This section includes the following caveats:

CSCsy59059

Symptom: If you configure a switch with the switchport block unicast command or the switchport block multicast command, the commands have no effect.

Conditions: You may see this symptom because the switch does not support the switchport block unicast command or the switchport block multicast command.

Workaround: Use the storm-control unicast level 100.00 command or the storm-control multicast level 100.00 command instead.

CSCsz85289

Symptom: It is not possible to resequence rules in a VACL.

Conditions: You may see this symptom when you attempt to resequence VACLs. Once the rules are added to a VACL in a sequence, you cannot change the sequence.

Workaround: Delete the entire set of rules in the VACL, and add them again.

If there is a VACL as in the following example, it is not possible to resequence the VACL matching IP ACL to 10 and VACL matching MAC ACL to 20:

switch(config)# vlan access-map vlan1 10
switch(config-access-map)# match mac address mac1
switch(config-access-map)# action forward
switch(config-access-map)# statistics per-entry

switch(config)# vlan access-map vlan1 20
switch(config-access-map)# match ip address ip1
switch(config-access-map)# action drop
switch(config-access-map)# statistics per-entry

Use a simple CLI for the workaround as follows:

switch(config)# vlan access-map vlan1 10
switch(config-access-map)# no match mac address mac1
switch(config-access-map)# no action forward
switch(config-access-map)# match ip address ip1
switch(config-access-map)# action drop
switch(config-access-map)# exit

switch(config)# vlan access-map vlan1 20
switch(config-access-map)# no match  ip address ip1
switch(config-access-map)# no action drop
switch(config-access-map)# match mac address mac1
switch(config-access-map)# action forward
switch(config-access-map)# exit

CSCta26017

Symptom: The bandwidth allocation does not work accurately if the egress traffic for a CoS is only multicast.

Conditions: You may see this symptom when the multicast traffic is to be transmitted on multiple ports. The symptom only occurs if destination ports are in the same port group.

Workaround: Distribute the destination ports among different port groups. Use the command show hardware internal ele-fwd driver-info to locate the front port and ASIC port mapping. There are four port groups in our system: (0-4), (5-9), (10-14), and 15-19). The numbering is indicated in terms of the ASIC ports in the output following the command.

CSCta28309

Symptom: Actions on VACL with no rules affect the traffic matching credible VACL rule.

Conditions: A single VLAN access map can have different actions for different ACLs. The way to configure it is as follows:

switch(config)# vlan access-map vacl1 10 
switch(config-access-map)# action forward
switch(config-access-map)# match mac address mac-acl-one
switch(config-access-map)# vlan access-map vacl1 20
switch(config-access-map)# action drop
switch(config-access-map)# match mac address mac-acl-two
switch(config-access-map)# vlan access-map vacl1 30
switch(config-access-map)# action redirect eth1/10
switch(config-access-map)# match mac address mac-acl-three

The three VACLs in the preceding example are part of one VLAN access map. Any change to any one of the access maps will result in reprogramming the entire access map (of all the sequence numbers). The reprogramming might result in traffic disruption.

Workaround: To prevent traffic disruption, define the VLAN access map in separate VLAN access maps (with different names).

CSCta48031

Symptom: Outgoing CPU generated traffic cannot be spanned.

Conditions: You may see this symptom when an interface is configured as a source port of a SPAN session (the direction being transmit only or transmit and receive). The CPU generated traffic could be for SoL, CDP, STP and such.

Workaround: No workaround is available.

CSCtb40514

Symptom: The switch can be configured with the same IP address on the front panel management port mgmt 0 and using the AMM on the management port mgmt 1. This configuration is not considered an error and both the interfaces remain operational.

Conditions: You may see this symptom when you configure the same IP address on management port mgmt 0 and management port mgmt 1.

Workaround: Do not configure the same IP address on management port mgmt 0 and management port mgmt 1.

CSCtb68736

Symptom: Users see a "port not compatible [speed]" error message while adding the downlink ports to a port-channel.

Conditions: You may see this symptom under the default configuration setting, when a downlink port is added as a member of port-channel interface.

Workaround: Type the speed 10000 command on the member port before adding it to the port-channel interface. As the show interface brief command displays the running speed of the downlink port, there may be some confusion in identifying the mismatch in speed. The default speed for the downlink interface is "auto" which does not match the default speed of the port-channel interface which is "10 G".

CSCtb99418

Symptom: If you configure a switch port speed to auto by entering the speed auto command under the interface sub-command, the port may not link up.

Conditions: You may see this symptom when the blade server has the NetXen NIC installed.

Workaround: Configure the port speed to 10 G by entering the speed 10000 command.

CSCtc01560

Symptom: A monitor port cannot be the destination port for more than one SPAN session.

Conditions: You may see this symptom when the destination port of one session is configured as the destination port for the second session.

Workaround: No workaround is available.

Open Caveats

This section describes the open caveats in Cisco NX-OS Release 4.1(2)E1(1) for the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter.

This section includes the following open caveats:

CSCsz81239

Symptom: Currently, the switch is using NTPd version 4.2.0a. Therefore, it is vulnerable to CVE-2009-0159.

Conditions: This symptom occurs when you operate the switch.

Workaround: No workaround is available.

CSCta41968

Symptom: The SSH becomes disabled while applying the "ssh key rsa 2048" line after a reload.

Conditions: You may see this symptom upon reloading, when the ASCII configuration containing the line "ssh key rsa 2048" is copied to the running configuration.

Workaround: If you lose access to the switch, use the serial console to enable it.

CSCtb04248

Symptom: The Qlogic converged network adapter (CNA) is unable to bring up the FCoE link, using the FIP session with the switch, when FCoE CoS is changed to a non-default value.

Conditions: You may see this symptom when CoS=3 is configured as a "drop" CoS in QoS configuration, instead of "pause no-drop". As the default CoS for FCoE traffic is CoS=3, the change in the configuration causes the DCBXP protocol not to converge between the CNA and the switch. As a result the FIP/FCoE session cannot start.

Workaround: Use the default value for FCoE, that is CoS=3, for FCoE traffic. When FCoE is enabled, ensure that CoS=3 is always configured as "pause no-drop" in QoS configuration.

CSCtb28328

Symptom: FIP sessions do not come up even though it appears as though enabling FIP snooping on a VLAN has succeeded when the ACL table is full.

Conditions: You may see this symptom because the ACL table is full and attempts to install ACLs when FIP is enabled on a VLAN fail.

Workaround: Whenever it is possible to do so, reduce the number of ACLs in use, save the configuration, and reload.

CSCtb99161

Symptom: Whenever a type qos policy is applied on a port channel, the show commands do not show that policy on the member interfaces of that port channel.

Conditions: You may see this symptom when a type qos policy is applied on a port channel and you type a show command to show that policy.

Workaround: In the hardware, the policy is applied correctly to the member interfaces, and whenever a policy is applied on a port channel, any existing policy on the member interface is overridden by the policy on the port channel.

CSCtc37793

Symptom: In certain configurations and with a certain kind of traffic flowing in the system, when you apply a new network-qos policy that changes the MTU of any CoS from what is currently programmed or you change the MTU settings in the currently active network-qos policy, the following failure may occur:

switch (config-sys-qos)# service-policy type network-qos policy-fcoe
Note: Operation in progress, please check the status using
"show system internal ipqos status".

Conditions: You may see this symptom when FIP snooping is enabled on the switch, and a certain type of traffic is flowing in the system when the MTU change is made.

Workaround: If the MTU change fails as described, apply the new configuration by performing the following steps:

1. Wait five minutes after the MTU change has failed.

2. Shut down all the ports.

3. Save the configuration by using the command copy r s.

4. Reload.

5. Upon bootup, make the MTU change, and apply the configuration.

6. No shut all the ports.

CSCtc42989

Symptom: When the traffic stops and the switch enters a near idle condition, stale entries remain in the MAC table.

Conditions: You may see this symptom when the aging timer is set to be greater than 251 seconds.

Workaround: Set the aging timer to a value of 250 seconds or lower using the command mac-address-table aging-time.

Related Documentation

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS documentation is available at the following URL:

http://www.cisco.com/go/techdocs

The following are related documents:

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Command Reference

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter NX-OS Configuration Guide

Cisco NX-OS System Messages Reference

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter Getting Started Guide

Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter Hardware Installation Guide

Regulatory Compliance and Safety Information for the Cisco Nexus 4001I and 4005I Switch Module for IBM BladeCenter

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.