
Issue 11
© Solarflare Communications 2014
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Solarflare Server Adapter
User Guide
2.13 Configure QSFP+ Adapter
QSFP+ adapters can operate as 2 x 10Gbps per QSFP+ port or as 1 x 40Gbps per QSFP+ port. A
configuration of 1 x 40G and 2 x 10G ports is not supported.
Figure 1: QSFP+ Port Configuration
The Solarflare 40G breakout cables have only 2 physical cables - for details refer to
to SFP+ Breakout Cables on page 28
. Breakout cables from other suppliers may have 4 physical
cables. When connecting a third party breakout cable into the Solarflare 40G QSFP+ cage (in 10G
mode), only cables 1 and 3 will be active.
The sfboot utility from the Solarflare Linux Utilities package (SF-107601-LS) can be used to configure
the adapter for 10G or 40G operation.
# sfboot port-mode=40G