OAM Interface and Static Routes

If Gateways are to be deployed with an OAM interface, complete the following steps.

1. Add an additional interface to the VM (ETH2).

   VMware: If a dedicated VNIC for Management/OAM is desired, add another vNIC of type vmxnet3. You must repeat the previous step, which is to click OK and then Edit Settings again so you can make a note of the vNIC MAC address.

   

   KVM: If a dedicated VNIC for Management/OAM is desired, make sure you have a libvirt network named oam-network. Then add the following lines to your XML VM structure:

   …..
   </controller>
   <interface type='network'>
     <source network='public_interface'/>
     <vlan><tag id='#public_vlan#'/></vlan>
     <alias name='hostdev1'/>
     <address type='pci' domain='0x0000' bus='0x00' slot='0x11' function='0x0'/>
   </interface>
   <interface type='network'>
     <source network='inside_interface'/>
     <alias name='hostdev2'/>
     <address type='pci' domain='0x0000' bus='0x00' slot='0x12' function='0x0'/>
   </interface>
   <interface type='network'> 
     <source network='oam_interface'/>
     <vlan><tag id='#oam_vlan#'/></vlan>
     <alias name='hostdev2'/>
     <address type='pci' domain='0x0000' bus='0x00' slot='0x13' function='0x0'/>
   </interface>
   <serial type='pty'>
     <source path='/dev/pts/3'/>
     <target port='0'/>
     <alias name='serial0'/>
   </serial>

2. Configure the network-config file with the additional interface.

   version: 2
   ethernets:
     eth0:
       addresses:
         - #_IPv4_Address_/mask#
     mac_address: #_mac_Address_#
       gateway4: #_IPv4_Gateway_#
       nameservers:
         addresses:
           - #_DNS_server_primary_#
           - #_DNS_server_secondary_#
         search: []
       routes:
         - to: 0.0.0.0/0
           via: #_IPv4_Gateway_#
           metric: 1
    
     eth1:
       addresses:
         - #_MGMT_IPv4_Address_/Mask#
       mac_address: #_MGMT_mac_Address_#
       nameservers:
         addresses:
           - #_DNS_server_primary_#
           - #_DNS_server_secondary_#
         search: []
       routes:
         - to: 0.0.0.0/0
           via: #_MGMT_IPv4_Gateway_#
          metric: 13
     
      eth2:
       addresses:
         - #_OAM_IPv4_Address_/Mask#
       nameservers:
         addresses:
           - #_DNS_server_primary_#
           - #_DNS_server_secondary_#
         search: []
       routes:
         - to: 10.0.0.0/8
           via: #_OAM_IPv4_Gateway_#
         - to: 192.168.0.0/16
           via: #_OAM_IPv4_Gateway_#