User guide

NetXtreme II User Guide
September 2013
Broadcom Corporation
Page 330 Miscellaneous Document INGSRVT78-CDUM100-R
Solution: Ensure that the system has at least 2 GB of main memory when using up to four network adapters and 4 GB of
main memory when using four or more network adapters.
Problem: Remote installation of Windows Server 2008 to an iSCSI target via iSCSI offload fails to complete, and the
computer restarts, repeatedly.
Solution: This is a Microsoft issue. For more information on applying the Microsoft hotfix, see Microsoft knowledge base
article KB952942 at http://support.microsoft.com/kb/952942.
Problem: Performance drops when a BCM5709C network adapter is connected back-to-back to a switch, MTU = 9000, and
Tx and Rx Flow Control are enabled.
Solution: When enable_cu_rate_limiter is enabled, the device performs flow control in the catchup path to prevent catchup
frames from dropping. The catchup path is used in processing iSCSI out-of-order PDUs. When enable_cu_rate_limiter is
disabled, there is a potential for some drops of iSCSI out-of-order PDUs, which reduces performance. This feature does not
work well when jumbo frame is enabled on any of the client devices. Enable_cu_rate_limiter should be set to disabled when
jumbo frame is enabled.
Problem: When using a BCM57840 4-port adapter in a blade server, ports 3 and 4 show no link.
Solution: The I/O (switch) module must support 32 internal ports. If it does not, ports 3 and 4 cannot establish a link.