Dell PowerVault MD3260i Series Manuale di risoluzione dei problemi - Pagina 13

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Dell PowerVault MD3260i Series Manuale di risoluzione dei problemi

Troubleshooting Physical Connectivity Problems

When experiencing problems with iSCSI host ports, always first check for simple connectivity issues (see

Basic Cabling, Power and Switch Issues). If problems persist, refer to the following table:

Table 4. Diagnosing iSCSI Host Port Connectivity

Issue/Problem

Experiencing physical link errors or

unable to successfully establish iSCSI

sessions

Suspected bad cable

No link LEDs visible on RAID

controller (rear)

Does the network switch and iSCSI

host port speed match?

Recommendation

Verify that a supported cable is connected from the

iSCSI host port(s) of the RAID controller module to

either:

(1) an industry-standard network switch

(2) directly to the iSCSI initiator on the host server

Recommended

Cable

CAT 6A or better

CAT 5E or better

Replace the suspected bad cable with a known good

cable. If problems persist, cable is probably OK.

If you are using a network switch, verify that it is

powered on and Ethernet ports on both the network

switch and RAID controller module are active. Also,

make sure the storage array enclosure is powered

on.

NOTE: For any iSCSI host port shown in MDSM, verify its

connection state as either Connected or

Disconnected in the Configure iSCSI Host Ports

window.

Network switch and iSCSI host port speeds must

match (or at least not exceed the capability of the

switch).

NOTE: iSCSI host ports can only auto-negotiate to port

speeds set in MD Storage Manager. Additionally,

the storage array will not downward auto-

negotiate (for example, will not automatically

auto-negotiate a 10Gb port setting down to a 1Gb

speed if a 1Gb switch is connected).

Any down-speed link setting/component in a

network configuration will impact throughout,

regardless of the speed of other components.

Maximum Speed

10Gbps (MD3600i-series)

1Gbps (MD3200i-series)