Cisco Nexus 1000V Layer 2 Switching Configuration Guide, Release 4.2(1)SV1(5.1)
Network Load Balancing for vEthernet
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Table Of Contents

Configuring Network Load Balancing for vEthernet

Information About Microsoft Network Load Balancing

Configuring vEths for Running Microsoft Load Balancing in (Default) Unicast Mode

Guidelines and Limitations

Configuring Microsoft Network Load Balancing Support in Interface Configuration Mode

Configuring Microsoft Network Load Balancing in Port Profile Configuration Mode

Feature History for Microsoft Network Load Balancing for Ethernet


Configuring Network Load Balancing for vEthernet

This chapter includes the following sections:

•Information About Microsoft Network Load Balancing

•Configuring vEths for Running Microsoft Load Balancing in (Default) Unicast Mode

•Feature History for Microsoft Network Load Balancing for Ethernet

Information About Microsoft Network Load Balancing

Microsoft NLB is a clustering technology offered by Microsoft as part of the Windows server operating systems. Clustering enables a group of independent servers to be managed as a single system for higher availability, easier manageability, and greater scalability.

For more information about Microsoft Network Load Balancing. See this URL:

http://technet.microsoft.com/en-us/library/bb742455.aspx

Note Access to third-party websites identified in this document is provided solely as a courtesy to customers and others. Cisco Systems, Inc. and its affiliates are not in any way responsible or liable for the functioning of any third-party website, or the download, performance, quality, functioning or support of any software program or other item accessed through the website, or any damages, repairs, corrections or costs arising out of any use of the website or any software program or other item accessed through the website. Cisco's End User License Agreement does not apply to the terms and conditions of use of a third-party website or any software program or other item accessed through the website.

Configuring vEths for Running Microsoft Load Balancing in (Default) Unicast Mode

This section includes the following topics:

•Guidelines and Limitations

•Configuring Microsoft Network Load Balancing Support in Interface Configuration Mode

•Configuring Microsoft Network Load Balancing in Port Profile Configuration Mode

Guidelines and Limitations

•no mac auto-static-learn config is not supported on PVLAN ports.

•no mac auto-static-learn config is not supported on the ports configured with switchport port-security mac-address sticky.

•On Microsoft Network Load Balancing (MS-NLB) enabled vEthernet interfaces , Unknown Unicast Flood Blocking (UUFB) does not block MS-NLB related packets. In these scanarios, UUFB can be used to limit flooding of MS-NLB packets to non-MS-NLB ports within a VLAN.

Configuring Microsoft Network Load Balancing Support in Interface Configuration Mode

You can configure Microsoft Network Load Balancing in interface configuration mode.

BEFORE YOU BEGIN

Before beginning this procedure, you must know or do the following:

Note Make sure that the Cisco Nexus 1000V is configured before you configure Microsoft NLB on Windows virtual machines (VMs).

•You are logged in to the CLI in EXEC mode.

•Unicast is the default Microsoft Network Load Balancing mode of operation.

•Microsoft NLB replaces the MAC address of each server in the cluster to a common Microsoft NLB MAC address.

SUMMARY STEPS

1. configure terminal

2. show running-config interface veth number

3. int veth 1

4. [no] mac auto-static-learn

5. (Optional) copy running-config startup-config

DETAILED STEPS

 
Command
Purpose

Step 1 

configure terminal

Example:

n1000v# configure terminal

n1000v(config)#

Enters global configuration mode.

Step 2 

show running-config interface <veth number>

Example:

show running-config interface Vethernet1

Displays the vEth configuration to determine if no mac auto-static-learn is configured or not.

Step 3 

int veth 1

Example:

n1000v(config)# int veth 1

Sets interface configuration mode on vEthernet modules.

Step 4 

[no] mac auto-static-learn

Example:

n1000v(config-if)# no mac auto-static-learn

Toggles the auto-mac-learning on vEthernet modules.

Step 5 

copy running-config startup-config

Example:

n1000v(config)# copy running-config startup-config

(Optional) Saves the running configuration persistently through reboots and restarts by copying it to the startup configuration.

EXAMPLES

The following example shows how to configure Microsoft Network Load Balancing directly on vEthernet: 

n1000v(config)# int vethernet 1

n1000v(config-if)# no mac auto-static-learn

n1000v(config-if)#

n1000v(config-if)# show run int vethernet 1

!Command: show running-config interface Vethernet1

!Time: Tue Nov 15 19:01:36 2011

version 4.2(1)SV1(5.1)

interface Vethernet1

  inherit port-profile vm59

  description stc3, Network Adapter 2

  no mac auto-static-learn

  vmware dvport 34 dvswitch uuid "ea 5c 3b 50 cd 00 9f 55-41 a3 2d 61 84 9e 0e c4"

  vmware vm mac 0050.56B3.0071

The following example shows how to unconfigure Microsoft Network Load Balancing directly from vEthernet: 

n1000v(config)# int vethernet 1

n1000v(config-if)# mac auto-static-learn

n1000v(config)# show run int vethernet 1

!Command: show running-config interface Vethernet1

!Time: Tue Nov 15 19:01:52 2011

version 4.2(1)SV1(5.1)

interface Vethernet1

  inherit port-profile vm59

  description stc3, Network Adapter 2

  mac auto-static-learn

  vmware dvport 34 dvswitch uuid "ea 5c 3b 50 cd 00 9f 55-41 a3 2d 61 84 9e 0e c4"

  vmware vm mac 0050.56B3.0071

n1000v(config)#

Configuring Microsoft Network Load Balancing in Port Profile Configuration Mode

You can configure Microsoft Network Load Balancing in port profile configuration mode.

BEFORE YOU BEGIN

Before beginning this procedure, you must know or do the following:

Note Make sure that the Cisco Nexus 1000V is configured before you configure Microsoft NLB on Windows virtual machines (VMs).

•You are logged in to the CLI in EXEC mode.

•Unicast is the default Microsoft Network Load Balancing mode of operation.

•Microsoft Network Load Balancing replaces the MAC address of each server in the cluster to a common Microsoft NLB MAC address.

SUMMARY STEPS

1. configure terminal

2. show running config port-profile <profile name>

3. port-profile type vethernet ms-nlb

4. [no] mac auto-static-learn

5. (Optional) copy running-config startup-config

DETAILED STEPS

 
Command
Purpose

Step 1 

configure terminal

Example:

n1000v# configure terminal

n1000v(config)#

Enters global configuration mode.

Step 1 

show running config port-profile <profile name>

Example:

n1000v(config)#show running config port-profile <profile name>

Displays the port profile configuration to determine if no mac auto-static-learn is configured or not.

Step 2 

port profile type vethernet ms-nlb

Example:

n1000v(config)# port profile type vethernet ms-nlb

Sets port profile configuration mode on vEthernet modules.

Step 3 

[no] mac auto-static-learn

Example:

n1000v(config-if)# no mac auto-static-learn

Toggles the auto-mac-learning on vEthernet modules.

Step 4 

copy running-config startup-config

Example:

n1000v(config)# copy running-config startup-config

(Optional) Saves the running configuration persistently through reboots and restarts by copying it to the startup configuration.

EXAMPLES

The following example shows how to configure Microsoft Network Load Balancing in port profile mode: 

n1000v(config)# port-profile type vethernet ms-nlb

n1000v(config-port-prof)#   vmware port-group

n1000v(config-port-prof)#   switchport mode access

n1000v(config-port-prof)#   switchport access vlan 59

n1000v(config-port-prof)#   no mac auto-static-learn

n1000v(config-port-prof)#   no shutdown

n1000v(config-port-prof)#   state enabled

n1000v(config-port-prof)#

n1000v(config-port-prof)# show run port-profile ms-nlb

!Command: show running-config port-profile ms-nlb

!Time: Tue Nov 15 19:00:40 2011

version 4.2(1)SV1(5.1)

port-profile type vethernet ms-nlb

  vmware port-group

  switchport mode access

  switchport access vlan 59

  no mac auto-static-learn

  no shutdown

  state enabled

The following example shows how to unconfigure Microsoft Network Load Balancing on vEthernet in 
port profile mode: 

n1000v(config)# port-profile type vethernet ms-nlb

n1000v(config-port-prof)# mac auto-static-learn

n1000v(config-port-prof)# show run port-profile ms-nlb

!Command: show running-config port-profile ms-nlb

!Time: Tue Nov 15 19:01:05 2011

version 4.2(1)SV1(5.1)

port-profile type vethernet ms-nlb

  vmware port-group

  switchport mode access

  switchport access vlan 59

  mac auto-static-learn

  no shutdown

  state enabled

Feature History for Microsoft Network Load Balancing for Ethernet

This section provides the release history for Network Load Balancing for Ethernet.

Table 7-1 Feature History for Network Load Balancing for Ethernet

Feature Name
Releases
Feature Information

Network Load Balancing

4.2(1)SV1(5.1)

This feature was introduced.