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Chapter 3

•

As with an FC-SAN, because of the large data flows (traffic volumes) the iSCSI LAN is

assumed to be a dedicated LAN separate from the business and management LANs, and

constructed with its own LAN switch.

•

iSCSI LAN redundancy is achieved by the use of multipaths.

•

For IP network security reasons too, it is useful to separate the iSCSI LAN (for data transfers)

and management LAN (for administration) to prevent cross-access between them (use of

VLAN to separate the LAN segments is recommended).

Example LAN switch connection configuration

A separate LAN segment is used for each

Server/Storage grouping. (*2)

Here, LAN ports 1, 2 and 10 comprise VLAN1,

while LAN ports 3 and 11 comprise VLAN2.

*1:

*2:

P3AM-4152-02ENZ0

ETERNUS Disk storage systems Server Connection Guide (iSCSI) for Linux

(SUSE Linux Enterprise Server)

LAN Switch Connection

[Business LAN]

LAN

card

Business server A

Business server B

LAN

card

LAN switch #1

LAN switches should not

[iSCSI LAN]

be inter-connected (*1)

LUN1

LUN2

LUN3

ETERNUS Disk storage system

In this system configuration, multipaths provide redundant connections between the servers and

storage system. LAN switches #1 and #2 provide physical separation of the network paths.

A separate LAN segment is provided in the LAN switch (using the switch VLAN function) for each

grouping of business servers and disk storage systems (equivalent to the FC zones).

LAN switch

LAN

card

Business server C

LAN

card

LAN switch #2

[iSCSI LAN]

Management

LAN switch

LAN port

[Management LAN]

The iSCSI LAN and management

LAN segments are kept separate

in the iSCSI LAN switches, helping

maintain the security of each.

Business LAN

Similarly to FC-SAN, a

dedicated LAN is used for

iSCSI, not the business LAN.

iSCSI LAN

Management LAN