Step A: Create the Bond

First, create the bond for the network devices. In the next step, you will add the devices to the bond.

To create the bond

1. On the AWS Elemental Server web interface, go to the Settings page and choose Network.

2. On the Network page, choose Network Devices.

3. On the Network Devices page, choose Add Network Device.

4. In the Add a New Network Device dialog, select bond (bondN).

5. Complete the fields as follows:

   • Bond ID: Provide a number that is unique among your bonded interfaces.

   • Management: Select if the devices that you're bonding are management interfaces.

   • Description: Auto-populates when you choose a device name. You can modify the description as needed.

   • Address Mode: Select the type of IP addresses this device uses, either dhcp, static, or none. If you're bonding eth0 and eth1, use static IPs.

   • IP Address, Netmask, Gateway: Available when static IP addresses are used only. Complete with your networking information.

   • Static Routes: Select if you're using static routing.

   • Network, Netmask, Gateway: Available when static routes are used only. Complete with your networking information.

6. In Mode, select the bonding mode that you're using. The following table describes the modes that AWS Elemental Server supports:

   Bonding mode	Description
   Round robin	Transmissions are received and sent sequentially on each bonded interface beginning with the first one available.
   Active backup	Transmissions are received and sent out via the first available bonded interface. The other interface is only used if the active interface fails.
   Balanced XOR	Using the exclusive-or (XOR) method, the interface matches up the incoming request's MAC address with the MAC address for one of the bonded interface NICs. Once this link is established, transmissions are sent out sequentially beginning with the first available interface.
   Broadcast	All transmissions are sent on all interfaces in the bond.
   IEEE 802.3ad dynamic link aggregation	Creates aggregation groups that share the same speed and duplex settings. Transmits and receives on all interfaces in the active aggregator. Requires a switch that is 802.3ad compliant.
   Adaptive transmit load balancing	Outgoing traffic is distributed according to current load on each interface in the bond. Incoming traffic is received by the currently active interface. If the receiving interface fails, another interface takes over the MAC address of the failed interface.
   Adaptive load balancing	Includes transmit and receive load balancing for IPV4 traffic. Receive load balancing is achieved through ARP negotiation.

7. In Link Mode, select the linking mode that you're using for this bond and complete the relevant fields, as described here:

   • For media-independent interface (MII) mode, complete these fields:

     • MII Monitoring Frequency: Determines how often the link state of each bonded interface is inspected for link failure, in milliseconds. We recommend 100ms as a starting point.

     • Use Carrier (optional): When checked, MII uses MII or ETHTOOL ioctls instead of netif_carrier_ok. Relies on the device driver to maintain link state. Note that ETHTOOL ioctls is less efficient and uses deprecated kernel calling sequences.

     • Down Delay (optional): Specifies the time, in milliseconds, to wait before disabling an interface after a link failure is detected. This value should be a multiple of the MII monitoring frequency. Otherwise, it AWS Elemental Server rounds it to the nearest multiple of the monitoring frequency. The default is 0.

     • LACP Rate (optional): Used with IEEE 802.3ad dynamic link aggregation only. Determines the rate that control packets are sent to the interface. Fast is every one second, and Slow is every 30 seconds.

     • Up Delay (optional): Specifies the time, in milliseconds, to wait before enabling an interface after a link failure is detected. This value should be a multiple of the MII monitoring frequency. Otherwise, it AWS Elemental Server rounds it to the nearest multiple of the monitoring frequency. The default is 0.

   • For address resolution protocol (ARP) mode, complete these fields:

     • ARP Interval: Determines how often the link state of each bonded interface is inspected, in milliseconds. Periodically checks devices for traffic and generates regular interval traffic via ARP probes for ARP IP target.

     • ARP IP Target: Specifies the IP address to use for ARP probes.

     • Use Carrier (optional): When checked, MII uses MII or ETHTOOL ioctls instead of netif_carrier_ok. Relies on the device driver to maintain link state. Note that ETHTOOL ioctls is less efficient and uses deprecated kernel calling sequences.

     • LACP Rate (optional): Used with IEEE 802.3ad dynamic link aggregation only. Determines the rate that control packets are sent to the interface. Fast is every one second, and Slow is every 30 seconds.

8. Choose Save. The new bond appears in the Network Devices list. Don't apply changes yet.