On 01/15/2014 05:23 AM, Natti Shwarts wrote:
Hello,
I'm trying to work with SCSI target over FCoE. (using fileio sample of SCST)
I'm using Linux 3.8.13 , Intel 10G card and HP5900 switch with VSAN 10 for
FCoE.
I am not familiar with the SCST commands to be able to tell you if
you're using it right. I might be able to give you some pointers to help
debug though.
The problem is that the target doesn't send FLOGI to the switch.
(I have windows client that works with the same switch and configuration
and succeed to login)
The following is the operation sequence I perform:
- vconfig add eth2 10
- load scst, scst_user
- fileio_tgt disk0 file0 disk1 file1
- modprobe fcoe
- echo eth2.10 > /sys/module/libfcoe/parameters/create_vn2vn (fcoeadm -c
eth2.10 returned an error)
This is definitely a problem.
* Does eth2.10 exist? Was the VLAN configured on the switch? How did you
configure it on the host/target? Did you manually create the vlan or did
you use the 'fipvlan' application to discover/create it?
* What was the output of the 'echo' command? Why did it fail?
* What did the log files say (dmesg/messages)? You can also turn on
debug_logging for the fcoe kernel modules to get more details. I
wouldn't bother with fcoe.ko at this point as its debug_logging is very
verbose. You could try the following commands after the modprobe.
# echo 0xFFFF > /sys/module/libfcoe/parameters/debug_logging
# echo 0xFFFF > /sys/module/libfc/parameters/debug_logging
- modprobe fcst
- echo "add disk0 0" >
/sys/kernel/scst_tgt/targets/fcst/20\:01\:b8\:ca\:3a\:62\:82\:f9/luns/mgmt
- echo "add disk1 1" >
/sys/kernel/scst_tgt/targets/fcst/20\:01\:b8\:ca\:3a\:62\:82\:f9/luns/mgmt
- echo 1 >
/sys/kernel/scst_tgt/targets/fcst/20\:01\:b8\:ca\:3a\:62\:82\:f9/enabled
My questions are:
1. What is wrong with the above sequence ?
You should have stopped at the fcoeadm fail, no need to proceed with the
failure.
2. Do you have any idea why fcoeadm fails ?
No, I don't have any information about the failure to draw a conclusion.
3. Is "fcoeadm -c eth2.10" is exactly the same as "echo eth2.10 >
/sys/module/libfcoe/parameters/create_vn2vn " ?
No. 'fcoeadm -c eth2.10' with do 'Fabric Mode' and not VN2VN.
I'm not sure what kernel version you're using. For a while we did not
have VN2VN support in fcoeadm. Only in more recent kernels did we change
the sysfs interfaces to use files in /sys/bus/fcoe/. This change allowed
us to add VN2VN support to fcoeadm with the '-m|--mode' option. The
'echo' method is how you enable VN2VN on older kernels. On newer kernels
that method will still work, but it is deprecated because of the new
interfaces.
Hope this helps,
//Rob
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