Determining Failure On The Network Side Of An Iscsi System - Acer HDS AMS200 Reference Manual

8.7

Determining Failure on the Network Side of an iSCSI System

One of the following or two or more items are considered to be the causes that the host
computer cannot communicate with the disk array subsystem. Check the validity of each
item, and take necessary actions if there is any problem.
The link status of LAN port in host computer is normal.
All the Network peripherals (Switch, router, and NIC etc.) are powered on.
if not, turn on the power.
All the LAN cables between host computer and disk array subsystem are connected to
the connector.
If the LAN cable is connected loosely, connect it tightly.
The port transfer rate of the HBA, Switch or NIC connected to the disk array subsystem is
1 Gbps.
The port transfer rate of the disk array subsystem is 1 Gbps rate, and the communication
mode is full-duplex.
The VLAN setting is correct.
The firewall setting is correct.
The setting for L3 Switch or router is correct.
The setting for the iSCSI driver of host computer is correct.
The IPsec of the host computer is disabled for the iSCSI port of the disk array subsystem.
The IPsec of the host computer needs to be disabled for the iSCSI port of the disk array
subsystem.
The setting of the IP address, subnet mask, default gateway and MTU value for both the
disk array subsystem and the host computer meets the network.
The MTU value needs to be set as the same value for all the devices (host computer,
Switch, disk array subsystem, etc.) in the LAN network. The MTU value of DF700 is static
and it is 1,500.
The host computer recognizes the iSCSI driver.
Doesn't it login with the correct IP address or the correct iSCSI Name of the Target is
executed by the host computer.
The TCP Port number of the iSCSI port of the subsystem is set correctly in the host
computer.
The "Discovery "and "Login" are executed by the host computer.
The IP address of the iSNS server is set correctly in the host computer and disk array
subsystem when iSCSI System has iSNS server.
The iSNS server can newly register the information of the iSCSI device (IP address and
iSCSI Name, etc.) when iSCSI System has iSNS server.
The CHAP User of the Initiator is registered in the iSCSI port of the disk array subsystem
when the Initiator authentication of the CHAP authentication is applied to the iSCSI
System.
If not, resister the CHAP User of the Initiator newly.
268 Chapter 8 Troubleshooting