Port Trunking; Configuring Port Trunking - Buffalo TeraStation 5000 User Manual

Port Trunking

Two Ethernet cables can be used to establish two separate communication routes providing LAN port redundancy
and improving communication reliability. The use of two Ethernet cables enables access to the TeraStation even if
one of the cables is disconnected.
The port trunking modes that can be set in the TeraStation are shown below.
Trunking Mode
Round-robin
*
Active-backup
XOR
*
Broadcast
Dynamic link aggregation
TLB
*A separate intelligent switch that supports EtherChannel or other port trunking is required. Configure two LAN
ports on the switch for port trunking first.
**A separate intelligent switch that supports IEEE 802.3ad is required. Configure LACP in the switch first.

Configuring Port Trunking

1
Use an Ethernet cable to connect the hub LAN port and TeraStation LAN port 1.
Notes:
• If the TeraStation is being used as an iSCSI hard drive, disable iSCSI before changing network settings such as
port trunking. Navigate to Drives - iSCSI in Settings and move the iSCSI switch to the
rarily.
• Do not connect the second Ethernet cable to the TeraStation yet.
• If using an intelligent switch, configure the LAN ports on the switch first, before connecting to the TeraSta-
tion.
2
In Settings, click Network.
3
Click to the right of "Port Trunking".
4
Choose a port group.
5
Select the LAN port that will be used, select the port trunking mode, and click Accept.
Characteristics
Network packets are transmitted in sequential order from the first
available NIC slave through the last.
Only one NIC slave in the bond is active. A different slave becomes
active if and only if the active slave fails.
Transmits network packets based on [(source MAC address XOR'd
with destination MAC address) modulo NIC slave count]. This
selects the same NIC slave for each destination MAC address.
Transmits network packets on all slave network interfaces.
Creates aggregation groups that share the network speed and
duplex settings. Utilizes all slave network interfaces in the active
**
aggregator group according to the 802.3ad specification.
The outgoing network packet traffic is distributed according to
the current load (relative to the speed) on each network interface
slave.
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