Resolving The Problem

Source

RETAIN tip: H201738

Symptom

On the Integrated Management Module (IMM), the Domain Name System (DNS) setting cannot be set to "Enabled" for an Internet Protocol version 6 (IPv6) DNS server address only. This issue occurs when there is not at least one Internet Protocol version 4 (IPv4) DNS server address also specified.

Affected configurations

The system may be any of the following IBM servers:

• System x3200 M3, type 7327, any model
• System x3200 M3, type 7328, any model
• System x3250 M3, type 4251, any model
• System x3250 M3, type 4252, any model

This tip is not software specific.

This tip is not option specific.

The following system firmware level(s) are affected:

• IMM firmware yuoo84c.

Solution

This behavior has been corrected in IMM firmware v1.28 (YUOOB7C).

The file is or will be available by selecting the appropriate Product name, Product machine type, and Operating system on IBM Support's Fix Central web page, at the following URL:

• http://www.ibm.com/support/fixcentral/systemx/groupView?query.productGroup=ibm%2FSystemx

Workaround

When the user wishes to enable DNS using an IPv6 addressed DNS server, an IPv4 address must also be specified. The IPv4 address does not have to be for the desired IPv6 DNS server. Any valid IPv4 address will allow for the DNS setting to be set to "Enabled".

Additional information

The Symptom occurs due to an error in handling the DNS enabled setting.

The Workaround of specifying both the DNS IPv6 address and an IPv4 address allows the "Enabled" setting to take effect.

The Fix will correct the DNS setting handling error.