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User Guide NetXtreme II
January 2010
Broadcom Corporation
Document ENGSRVT52-CDUM100-R Frequently Asked Questions Page 57
Question: During backup operations, does the adapter teaming algorithm load balance data at a byte-level or a session-
level?
Answer: When using adapter teaming, data is only load balanced at a session level and not a byte level to prevent out-of-
order frames. Adapter teaming load balancing does not work the same way as other storage load balancing mechanisms
such as EMC PowerPath.
Question: Is there any special configuration required in the tape backup software or hardware to work with adapter teaming?
Answer: No special configuration is required in the tape software to work with teaming. Teaming is transparent to tape
backup applications.
Question: How do I know what driver I am currently using?
Answer: In all operating systems, the most accurate method for checking the driver revision is to physically locate the driver
file and check the properties.
Question: Can SLB detect a switch failure in a Switch Fault Tolerance configuration?
Answer: No. SLB can only detect the loss of link between the teamed port and its immediate link partner. SLB cannot detect
link failures on other ports.
Question: Why does my team lose connectivity for the first 30 to 50 seconds after the primary adapter is restored (fall-back
after a failover)?
Answer: During a fall-back event, link is restored causing Spanning Tree Protocol to configure the port for blocking until it
determines that it can move to the forwarding state. You must enable Port Fast or Edge Port on the switch ports connected
to the team to prevent the loss of communications caused by STP.
Question: Where do I monitor real time statistics for an adapter team in a Windows server?
Answer: Use the Broadcom Advanced Control Suite 3 (BACS) to monitor general, IEEE 802.3 and custom counters.
Question: What features are not supported on a multivendor team?
Answer: TOE, VLAN tagging, and RSS are not supported on a multivendor team.