Chapter 3 Notes
3.6 LAN Switch Connection Notes
ETERNUS DX Disk storage systems User’s Guide -Server Connection- (iSCSI) for VMware® ESX
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Copyright 2012 FUJITSU LIMITED P3AM-3412-11ENZ0
3.6 LAN Switch Connection Notes

•Since an iSCSI LAN handles large amounts of data (traffic volumes) like an FC-SAN, the

iSCSI LAN must have its own switch and be a dedicated LAN separate from the business

LANs.

•iSCSI LAN redundancy is achieved by the use of multipaths.

•For IP network security, the iSCSI LAN assumed to be a dedicated LAN separated from the

management LAN (for administration).

•The iSCSI LAN must be configured as a dedicated LAN for each path from a server to the

ETERNUS DX Disk storage system.

Example of a LAN switch connection configuration

*1: 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.
*2: 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).
Business server A
LAN
Card#2
LAN
Card#1
Business server B
LAN
Card#2
LAN
Card#1
Business server C
LAN
Card#2
LAN
Card#1
LAN
Card#3
LAN switch
[Business LAN]
LAN switch
[Management LAN]
ETERNUS DX Disk storage system
12
LAN switch #1
[iSCSI LAN]
1 2 3
10 11 12
LUN1 LUN2
10
2 3
11
LAN switch #2
[iSCSI LAN]
LAN
Card#3
LAN
Card#3
1
LUN3 Management
LAN port
LAN switches should
not be inter-connected*1
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.
The iSCSI LAN and management LAN
segments are kept separate in the iSCSI
LAN switches, helping maintain the security
of each.
Similarly to FC-SAN,
a dedicated LAN is used for iSCSI,
not the business LAN.
Business LAN
iSCSI LAN
Management LAN