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Trunking and LACP

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5.9 Trunking and LACP Link aggregation is the technique of taking several distinct Ethernet links to let them appear as a single link. It has a larger bandwidth and provides the fault tolerance ability. Beside the advantage of wide bandwidth, the I/O traffic remains operating until all physical links fail. If any link is restored, it will be added to the link group automatically. D-LINK implements link aggregation as LACP and Trunking. 1. LACP (IEEE 802.3ad): The Link Aggregation Control Protocol (LACP) is a part of IEEE specification 802.3ad. It allows bundling several physical ports together to form a single logical channel. A network switch negotiates an automatic bundle by sending LACP packets to the peer. Theoretically, LACP port can be defined as active or passive. D-LINK IP SAN Storage implements it as active mode which means that LACP port sends LACP protocol packets automatically. Please notice that using the same configurations between D-LINK controller and gigabit switch. The usage occasion of LACP: A. It's necessary to use LACP in a network environment of multiple switches. When adding new devices, LACP will separate the traffic to each path dynamically. Figure 5.9.1 2. Trunking (Non-protocol): Defines the usage of multiple iSCSI data ports in parallel to increase the link speed beyond the limits of any single port. The usage occasion of Trunking: A. This is a simple SAN environment. There is only one switch to connect the server and storage. And there is no extra server to be added in the future. B. There is no idea of using LACP or Trunking, uses Trunking first. C. There is a request of monitoring the traffic on a trunk in switch. 108

Section	Page
Chapter 1 Overview	6
1.1 Features	6
1.1.1 Highlights	7
1.2 RAID concepts	8
1.2.1 Terminology	8
1.2.2 RAID levels	10
1.2.3 Volume relationship	11
1.3 iSCSI concepts	12
1.4 IP SAN storage specifications	13
1.4.1 Technical specifications	13
1.4.2 FCC and CE statements	16
Chapter 2 Installation	19
2.1 Package contents	19
2.2 Before installation	19
2.3 Enclosure	19
2.3.1 Front view	19
2.3.2 Front LED lights	20
2.3.3 Install drives	21
2.3.4 Rear view	22
2.4 Install battery backup module	25
2.5 Deployment	26
Chapter 3 Quick setup	29
3.1 Management interfaces	29
3.1.1 Serial console	29
3.1.2 Remote control	29
3.1.3 Web UI	30
3.2 How to use the system quickly	32
3.2.1 Quick installation	32
3.2.2 Volume creation wizard	35
Chapter 4 Configuration	38
4.1 Web UI management interface hierarchy	38
4.2 System configuration	39
4.2.1 System setting	39
4.2.2 Network setting	40
4.2.3 Login setting	41
4.2.4 Mail setting	42
4.2.5 Notification setting	43
4.3 iSCSI configuration	45
4.3.1 NIC	45
4.3.2 Entity property	48
4.3.3 Node	48
4.3.4 Session	51
4.3.5 CHAP account	52
4.4 Volume configuration	53
4.4.1 Physical disk	54
4.4.2 RAID group	57
4.4.3 Virtual disk	60
4.4.4 Snapshot	65
4.4.5 Logical unit	68
4.4.6 Example	69
4.5 Enclosure management	74
4.5.1 Hardware monitor	75
4.5.2 UPS	76
4.5.3 SES	78
4.5.4 Hard drive S.M.A.R.T.	78
4.6 System maintenance	79
4.6.1 System information	79
4.6.2 Event log	80
4.6.3 Upgrade	82
4.6.4 Firmware synchronization	82
4.6.5 Reset to factory default	83
4.6.6 Import and export	83
4.6.7 Reboot and shutdown	84
4.7 Home/Logout/Mute	84
4.7.1 Home	84
4.7.2 Logout	84
4.7.3 Mute	85
Chapter 5 Advanced operations	86
5.1 Volume rebuild	86
5.2 RG migration	88
5.3 VD extension	89
5.4 Snapshot	89
5.4.1 Create snapshot volume	90
5.4.2 Auto snapshot	91
5.4.3 Rollback	92
5.4.4 Snapshot constraint	93
5.5 Disk roaming	95
5.6 VD clone	95
5.7 SAS JBOD expansion	103
5.7.1 Connecting JBOD	103
5.7.2 Upgrade firmware of JBOD	105
5.8 MPIO and MC/S	106
5.9 Trunking and LACP	108
5.10 Dual controllers (only for DSN-6410 with DSN-640)	109
5.10.1 Perform I/O	109
5.10.2 Ownership	110
5.10.3 Controller status	111
5.11 Replication	112
5.12 VLAN	122
Chapter 6 Troubleshooting	125
6.1 System buzzer	125
6.2 Event notifications	125
Appendix	133
A. Certification list	133
B. Microsoft iSCSI initiator	136

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108

5.9

Trunking and LACP

Link aggregation is the technique of taking several distinct Ethernet links to let them

appear as a single link. It has a larger bandwidth and provides the fault tolerance ability.

Beside the advantage of wide bandwidth, the I/O traffic remains operating until all

physical links fail. If any link is restored, it will be added to the link group automatically.

D-LINK

implements link aggregation as LACP and Trunking.

LACP (IEEE 802.3ad):

The Link Aggregation Control Protocol (LACP) is a part of

IEEE specification 802.3ad. It allows bundling several physical ports together to form

a single logical channel. A network switch negotiates an automatic bundle by sending

LACP packets to the peer. Theoretically, LACP port can be defined as active or passive.

D-LINK

IP SAN Storage implements it as active mode which means that LACP port

sends LACP protocol packets automatically. Please notice that using the same

configurations between

D-LINK

controller and gigabit switch.

The usage occasion of LACP:

It’s necessary to use LACP in a network environment of multiple switches. When

adding new devices, LACP will separate the traffic to each path dynamically.

Figure 5.9.1

Trunking (Non-protocol)

: Defines the usage of multiple iSCSI data ports in parallel

to increase the link speed beyond the limits of any single port.

The usage occasion of Trunking:

This is a simple SAN environment. There is only one switch to connect the server

and storage. And there is no extra server to be added in the future.

There is no idea of using LACP or Trunking, uses Trunking first.

There is a request of monitoring the traffic on a trunk in switch.