Qnap TS-420 Port Trunking Hk.?

Balance-rr (Round-Robin)

Round-Robin
mode is good for general purpose load balancing between two Ethernet
interfaces. This mode transmits packets in sequential order from the
first available slave through the last. Balance-rr provides load
balancing and fault tolerance.

Supports static trunking. Make sure static trunking is enabled on the switch.

Active Backup

Active
Backup uses only one Ethernet interface. It switches to the second
Ethernet interface if the first Ethernet interface does not work
properly. Only one interface in the bond is active. The bond's MAC
address is only visible externally on one port (network adapter) to
avoid confusing the switch. Active Backup mode provides fault tolerance.

General switches

Balance XOR

Balance
XOR balances traffic by splitting up outgoing packets between the
Ethernet interfaces, using the same one for each specific destination
when possible. It transmits based on the selected transmit hash policy.
The default policy is a simple slave count operating on Layer 2 where
the source MAC address is coupled with destination MAC address.
Alternate transmit policies may be selected via the xmit_hash_policy
option. Balance XOR mode provides load balancing and fault tolerance.

Supports static trunking. Make sure static trunking is enabled on the switch.

Broadcast

Broadcast sends traffic on both network interfaces. This mode provides fault tolerance.

Supports static trunking. Make sure static trunking is enabled on the switch.

IEEE 802.3ad (Dynamic Link Aggregation)

Dynamic
Link Aggregation uses a complex algorithm to aggregate adapters by
speed and duplex settings. It utilizes all slaves in the active
aggregator according to the 802.3ad specification. Dynamic Link
Aggregation mode provides load balancing and fault tolerance but
requires a switch that supports IEEE 802.3ad with LACP mode properly
configured.

Supports 802.3ad LACP

Balance-tlb (Adaptive Transmit Load Balancing)

Balance-tlb
uses channel bonding that does not require any special switch. The
outgoing traffic is distributed according to the current load on each
Ethernet interface (computed relative to the speed). Incoming traffic is
received by the current Ethernet interface. If the receiving Ethernet
interface fails, the other slave takes over the MAC address of the
failed receiving slave. Balance-tlb mode provides load balancing and
fault tolerance.

General switches

Balance-alb (Adaptive Load Balancing)

Balance-alb
is similar to balance-tlb but also attempts to redistribute incoming
(receive load balancing) for IPV4 traffic. This setup does not require
any special switch support or configuration. The receive load balancing
is achieved by ARP negotiation sent by the local system on their way out
and overwrites the source hardware address with the unique hardware
address of one of the Ethernet interfaces in the bond such that
different peers use different hardware address for the server. This mode
provides load balancing and fault tolerance.

General switches