A Using Cisco Nexus Switches with neutron #

Cisco Nexus series 3000, 5000 or 7000

All Compute Nodes must be equipped with at least two network cards.

The switch needs to have the XML management interface enabled. SSH access to the management interface must be enabled (refer to the switch's documentation for details).

Enable VLAN trunking for all neutron managed VLANs on the switch port to which the controller node running neutron is connected to.

Before deploying neutron, check if VLAN configurations for neutron managed VLANs already exist on the switch (for example, from a previous SUSE OpenStack Cloud deployment). If yes, delete them via the switch's management interface prior to deploying neutron.

When using the Cisco plugin, neutron reconfigures the VLAN trunk configuration on all ports used for the nova-fixed traffic (the traffic between the instances). This requires to configure separate network interfaces exclusively used by nova-fixed. This can be achieved by adjusting /etc/crowbar/network.json (refer to Section 7.5, “Custom Network Configuration”). The following example shows an appropriate configuration for dual mode, where nova-fixed has been mapped to conduit intf1 and all other networks to other conduits. Configuration attributes not relevant in this context have been replaced with ....

{
   "attributes" : {
      "network" : {
         "conduit_map" : [
            ...
         ],
         "mode" : "single",
         "networks" : {
            "nova_fixed" : {
              ...,
              "conduit" : "intf1"
            },
            "nova_floating" : {
              ...,
              "conduit" : "intf0"
            },
            "public" : {
              ...,
              "conduit" : "intf0"
            },
            "storage" : {
              ...,
              "conduit" : "intf0"
            },
            "os_sdn" : {
              ...,
              "conduit" : "intf0"
            },
            "admin" : {
              ...,
              "conduit" : "intf0"
            },
            "bmc" : {
              ...,
              "conduit" : "bmc"
            },
            "bmc_vlan" : {
              ...,
              "conduit" : "intf2"
            },
         },
         ...,
      },
   }
}

Make a note of all switch ports to which the interfaces using the nova-fixed network on the Compute Nodes are connected. This information will be needed when deploying neutron.