QNAP TS-859 Pro+, User Manual, Page: 24 / 242

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acquire an IP address from the DHCP server again.
For example, to establish a DLNA network and share the multimedia files on the
NAS to the DLNA digital media players via UPnP while there is no NAT gateway
that supports DHCP server, you can enable the DHCP server feature of the NAS.
The NAS will allocate dynamic IP address to the media players or other clients
automatically.
Note: If there is an existing DHCP server on your LAN, do not enable this
function. Otherwise, there will be IP address allocation and network access
errors.
ii. Port Trunking
Applicable to the models with two LAN ports only.
Port Trunking provides network load balancing and fault tolerance by combining two
Ethernet interfaces into one to increase the bandwidth beyond the limits of any one
single interface at the same time offers the redundancy for higher availability when
both interfaces are connected to the same switch that supports 'Port Trunking'.
Field Description
Balance-rr
(Round-Robin) The packets are transmitted in sequential order from
the first available slave to the last. This mode provides
load balancing and fault tolerance.
Active Backup Only one active slave is used to transmit packets. A
different slave becomes active if, and only if, the active
slave fails. The bond’s MAC address is externally
visible on only one port (network adapter) to avoid
confusing the switch. This mode provides fault
tolerance.
Balance XOR The packets are transmitted based on the hash policy.
The default policy is a simple [(source MAC address
XOR’d with destination MAC address) modulo slave
count]. Alternate transmit policies may be selected via
the xmit_hash_policy option. This mode provides load
balancing and fault tolerance.
Broadcast The packets are transmitted on all slave interfaces.
This mode provides fault tolerance.