Qlogic FastLinQ 3400 Series, User Manual

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18–Troubleshooting
Possible Problems and Solutions
253 83840-546-00 E
Problem : A system containing an 802.3ad team causes a Netlogon service failure
in the system event log and prevents it from communicating with the domain
controller during boot up.
Solution : Microsoft Knowledge Base Article 326152
( http://support.microsoft.com/kb/326152/en-us ) indicates that Gigabit Ethernet
adapters may experience problems with connectivity to a domain controller due to
link fluctuation while the driver initializes and negotiates link with the network
infrastructure. The link negotiation is further affected when the Gigabit adapters
are participating in an 802.3ad team due to the additional negotiation with a switch
required for this team type. As suggested in the Knowledge Base Article above,
disabling media sense as described in a separate Knowledge Base Article 938449
(
http://support.microsoft.com/kb/938449 ) has shown to be a valid workaround
when this problem occurs.
Problem : A Generic Trunking (GEC/FEC) 802.3ad-Draft Static type of team may
lose some network connectivity if the driver to a team member is disabled.
Solution : If a team member supports underlying management software
(ASF/UMP), the link may be maintained on the switch for the adapter despite its
driver being disabled. This may result in the switch continuing to pass traffic to the
attached port rather than route the traffic to an active team member port.
Disconnecting the disabled adapter from the switch will allow traffic to resume to
the other active team members.
Problem : Large Send Offload (LSO) and Checksum Offload are not working on
my team.
Solution : If one of the adapters on a team does not support LSO, LSO does not
function for the team. Remove the adapter that does not support LSO from the
team, or replace it with one that does. The same applies to Checksum Offload.
Problem : The advanced properties of a team do not change after changing the
advanced properties of an adapter that is a member of the team.
Solution : If an adapter is included as a member of a team and you change any
advanced property, then you must rebuild the team to ensure that the team’s
advanced properties are properly set.
Linux
Problem : 8400/3400 Series devices with SFP+ Flow Control default to Off rather
than Rx/Tx Enable.
Solution : The Flow Control default setting for revision 1.6.x and newer has been
changed to Rx Off and Tx Off because SFP+ devices do not support
Autonegotiation for Flow Control.