LIP destroyed xxx active commands

[Tom Samplonius]

>>>>   It seems that isp0 is connected to a loop topology network (as opposed 
>>>> to a point to point, or fabric), and something keeps initializing the 
>>>> loop by sending a LIP command.
>>>> 
>>>>   Are you plugging or unplugging things into the loop all of the time? 
>>>> Or are you loop part on a switch, and someone else is plugging or 
>>>> unplugging things from the fabric?  If you are going straight into a 
>>>> switch, it might be better to change the port to a fabric port instead.
>>> 
>>> 
>>> This host has it's isp device directly connected to a fiber channel array.
>> 
>>   Probably should use point-to-point mode instead.  See if you can change 
>> the port type on the array controller.
>
> Ok - I can do that.  If I do that, will that disrupt filesystem activity?

   You will probably have to reboot, actually.  The isp driver will probably get 
confused if the port changed type.  So do a shutdown, change the port, and then 
boot up.

>>> The array is not disappearing, or being rebooted, nor is there any other 
>>> machine rebooting or resetting.   I see these same errors on another box 
>>> that has 3 arrays connected to a qlogic switch.  I seem to only see these 
>>> when the machine is heavily accessing the disks.
>> 
>>   Same here.  You shouldn't see LIPs on a fabric.  So the QLogic switch 
>> must be trying to maintain a loop per port.
>> 
>>   I suspect that loop mode is also less stable than point-to-point or 
>> fabric. There is an indication in the isp manpage that it is possible for 
>> the driver to hang on boot waiting for a LIP.  The solution to that problem 
>> has been to force a LIP (unplug something), or don't use a loop mode.
>
> What do I need to change on the qlogic switch/initiator/target ends to force 
> things?

   I don't know how do this on QLogic switch.  If it is actually a switch, it 
should have a cli or http management interface to configure ports.  If it does 
not have an interface, it may be a hub, in which it is actually a loop (fibre 
channel hubs are effectively a daisy chained loop of ports).

> Thanks for your help!
>
>
> Eric

Tom