Sun Storage 7000 Unified Storage System: The network connection keeps getting set to half duplex

Asset ID:	1-72-1372016.1
Update Date:	2012-06-25
Keywords:

Solution Type Problem Resolution Sure

Solution 1372016.1 : Sun Storage 7000 Unified Storage System: The network connection keeps getting set to half duplex

Applies to:

Sun ZFS Storage 7420 - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7720 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7210 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7110 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
Sun Storage 7410 Unified Storage System - Version Not Applicable to Not Applicable [Release N/A]
7000 Appliance OS (Fishworks)
NAS head revision : not dependent
BIOS revision : not dependent
ILOM revision : not dependent
JBODs Model : not dependent
CLUSTER related : not dependent

Symptoms

The network connection keeps getting set to half duplex

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Cause

It is likely that the switch is not set to auto-negotiation.

It is also possible that there could be a broken cable or NIC port.

Solution

Set the devices at both ends of the network link to auto-negotiate.

When a device set to auto-negotiation is connected to a device that is not using auto-negotiation, the auto-negotiation process fails. The auto-negotiating end of the connection is still able to correctly detect the speed of the other end, but cannot correct the duplex mode. The standard requires the use of half duplex in these conditions. Therefore, the auto-negotiating end of the connection uses half duplex while its peer is locked at full duplex, and this is a duplex mismatch.

As there is no configuration setting available on the Sun Storage 7000 Unified Storage System to set the half or full duplex, the best solution is to enable auto-negotiation on the switch.

Back to <Document 1392086.1> Sun Storage 7000 Unified Storage System: How to Troubleshoot Network Problems,

References

<NOTE:1392086.1> - Sun Storage 7000 Unified Storage System: How to Troubleshoot Network Problems

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