Table 82 Features Of The Bonding Operation Mode - Fujitsu ETERNUS DX S5 Series Design Manual

5. Connection Configuration
NAS Connection
■
Bonding Operation Mode
Six operation modes are available for Bonding. Select the appropriate mode according to the usage. Using Mode
4 is recommended when there are no special requirements.
The following table shows the features of each mode.
Table 82 Features of the Bonding Operation Mode
Mode Name
0 balance-rr
1 active-backup
2 balance-xor
4 802.3ad
5 balance-tlb
6 balance-alb
¡: Possible ´: Impossible △: Partially supported —: N/A
*1: With the Exclusive-OR (XOR) operation, packets are transferred using the NAS port that matches the MAC address of the incoming
request. Because load balancing methods depend on the XOR operation, communications traffic may be unbalanced.
*2: Load balancing during reception is not performed for ports specified with IPv6 addresses.
Mode 0 (balance-rr)
•
Enables performance improvements (load balancing). All NAS ports are used in a rotation (round-robin) for
transmitting. Reception depends on the switch setting.
The switch must have the Ether Channel function. For some switches, Ether Channel is also called "port
trunking" or "link aggregation".
Connect the ETERNUS DX and the switch directly. Note that settings may be required for some switch models.
For details, refer to relevant manuals of the switch.
• Mode 1 (active-backup)
Dedicated to the duplication function. One NAS port is used to transfer packets during normal operation. If an
error occurs in the active port, a different port is used.
Connecting a different switch to each port can improve fault tolerance. The switch to be connected must
support Internet Group Management Protocol (IGMP).
• Mode 2 (balance-xor)
Enables performance improvements (load balancing). In transmission, data is distributed according to the
settings in the connection destination. Reception depends on the switch setting.
The switch must have the Ether Channel function. For some switches, "Ether Channel" is also called "port
trunking" or "link aggregation".
Connect the ETERNUS DX and the switch directly. Note that settings may be required for some switch models.
For details, refer to relevant manuals of the switch.
• Mode 4 (802.3ad)
Enables performance improvements (load balancing). Data is distributed according to the methods
compatible with the IEEE 802.3ad Dynamic link aggregation standards. Ports used for receiving and
transmitting are determined by multiple information.
Use a switch compatible with IEEE 802.3ad Link Aggregation.
Connect the ETERNUS DX and the switch directly. Note that settings may be required for some switch models.
For details, refer to relevant manuals of the switch.
Performance improvements (load
balancing)
Transmission Reception
Depending on switch
¡
´ ´
¡ (*1) Depending on switch
¡ (*1) Depending on switch
´
¡
△ (*2)
¡
226
Functions required for the
Fault tolerance
switch
Ether Channel
¡
IGMP
¡
Ether Channel
¡
LACP (IEEE 802.3ad)
¡
¡ IGMP
¡ IGMP
Design Guide