How to configure Multi-NIC vMotion with Cisco Nexus 1000v?

By | January 18, 2015

A few days ago I wrote an article about How to speed up vMotion? In this article, I mentioned that one of the way to improve performance of vMotion is configuring Multi-NIC vMotion. Just for a quick reminder on Multi-NIC vMotion:

  • Multi-NIC vMotion was introduced in vSphere 5.0
  • This feature provides load balancing the vMotion network traffic over multiple network adapters. It means that one vMotion session is balanced between all available vmknic.
  • Multi-NIC vMotion is based on Active and Standby NIC configuration

The configuration of Multi-NIC vMotion with VMware  vSphere Standard Switch (vSS) or Distributed Switch (vDS) is simple. But what about Cisco Nexus 1000v?

Cisco Nexus 1000v does not provide standby NIC in meaning as vSS or vDS does and it is necessary to configure Multi-NIC vMotion following the steps:

  1. Create a vmkernel port for each physical NIC being used for multi-NIC vMotion per host
  2. Create a vethernet port profile on the 1000v for each vmkernel interface you created in step 1. For every vethernet port profile increase pinning id (0, 1, 2..)
  3.  

    port-profile type vethernet Multi-NIC_vMotion1
    vmware port-group vMotion1
    switchport mode access
    switchport access vlan 990
    pinning id 0
    no shutdown
    state enabled

  4. Connect each vmkernel port to its matching port profile
  5. Set channel group mode mac-pinning to relative for ethernet port profile
  6.  

    port-profile type ethernet Multi-NIC_vMotion_UPLINK
    vmware port-group vMotion_UPLINK
    switchport mode access
    switchport access vlan 990
    channel-group auto mode on mac-pinning relative
    no shutdown
    state enabled

As I mentioned in my another article about vPC Host Mode, Nexus 1000v supports creating a special Port Channel even if the upstream physicals switches cannot support PortChannel. This feature is based on Mac Pinning and also used to configure Multi-NIC vMotion with Cisco Nexus 1000v.

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