Unable to connect to the ILOM using NET0 side-band when switch is set to 1000 Mbit/s (1 Gbit/s)

Asset ID:	1-72-2131855.1
Update Date:	2017-12-12
Keywords:

Solution Type Problem Resolution Sure

Solution 2131855.1 : Unable to connect to the ILOM using NET0 side-band when switch is set to 1000 Mbit/s (1 Gbit/s)

Applies to:

Sun Server X3-2 - Version All Versions to All Versions [Release All Releases]
Sun Server X3-2L - Version All Versions to All Versions [Release All Releases]
Sun Server X4-2 - Version All Versions to All Versions [Release All Releases]
Sun Server X4-2L - Version All Versions to All Versions [Release All Releases]
x86

Symptoms

Unable to connect to the ILOM using NET0 side-band when switch is set to 1000 Mbit/s (1 Gbit/s).

Changes

Some customers chose to use the NET0 port to access the ILOM rather than using the NET-MGT port. We refer to this as using sideband on NET0. The customer will experience slower than expected negotiated transmit rates or in some cases, no connectivity at all if the connected switch is set to 1000 Mbit/s.

Cause

The AST2300 Service Processor chip provides two 10/100/1000 interfaces configured as either one 1000 Mbit/s OR two slower 10/100 Mbit/s interfaces. In these affected servers, we implement both Ethernet controllers (the latter option), with 1 driving NET-MGT and the other driving the sideband interface. Therefore, both NET-MGT and Sidband are always restricted to 10/100 Mbit/s.

This may seem confusing to customers as the NET0 port can normally negotiate transmit rates up to 1000 Mbit/s when not configured for sideband.

Solution

The transmit rate for both NET-MGT and Sideband can not be configured for 1000 Mbit/s. If using sidband or NET-MGT, the connected switch must be able to negotiate 100 Mbit/s or less.

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