Checking LSO on an particular interface:
Login to your IBM i 5250 terminal via QSECOFR
user and follow the below steps to check the LSO status:
- Run
STRSST
, then login to the System Service Tools - Select option
1
- Start a Service Tool - Select option
4
- Display/Alter/Dump - Select option
1
- Display/Alter storage - Select option
2
- Licensed Internal Code (LIC) data - Select option
14
- Advanced Analysis - Enter
1
under Options andNETSTAT
under Command field and then press <Enter> - On the next screen type
-pif
on the Options command field and then press <Enter> - On the next screen, select option
F10
, if an interface is enabled with LSO, it will be shown.- To change the state of LSO, you will need to note the Line description name and gather the "Resource name" by issuing
WRKLIND
command on the OS terminal and select option5
in front of the line description you want LSO to be changed.
- To change the state of LSO, you will need to note the Line description name and gather the "Resource name" by issuing
I Act I Act S Confg Actl Intf P Line Type Status P Ifcs MTU P Ifcs MTU A Status MTU MTU Index VLAN P --------------- -------- -------- 4 ---- ----- 6 ---- ----- C ------ ----- ----- ----- ---- PoE ETHLINE Eth V2 Active | 1 1500 | 0 0 | N/A 0 0 2 T4,T6,LSO4,LSO6, *LOOPBACK *NONE Active | 1 576 | 1 16384 | N/A 0 0 1 IP,T4,U4,T6,U6,
LSO4
for IPV4 and LSO6
is for IPV6
Disable/Enable LSO:
To disable or enable LSO please follow the steps below:
- Once you are logged into IBM i 5250 terminal (remotely or via SRA), end the TCP/IP interface that was noted on the previous topic on Step 9, by entering the command with appropriate internet address and Line description
ENDTCPIFC INTNETADR ('IP.ADD.RE.SS') LIND (YOUR LIND)
- VaryOff the Line description by using the following command with the appropriate line description name used in Step 1
VRYCFG CFGOBJ(YOUR LIND) CFGTYPE(*LIN) STATUS(*OFF) ASCVRYOFF(*YES)
. - Now run
STRSST
then login to the System Service Tools - Select option
1
- Start a Service Tool - Select option
4
- Display/Alter/Dump - Select option
1
- Display/Alter storage - Select option
2
- Licensed Internal Code (LIC) data - Select option
14
- Advanced Analysis - Enter option
1
in the options column for the first (blank) line and type inSETLARGESENDOFFLOAD
in the command field, then press <Enter> - Enter
SETLARGESENDOFFLOAD -rsc CMNXX -flag OFF
in options and press <Enter>- Or use ON to re-enable, CMNXX is the CMNXX resource backing the Line description that was noted on the previous section step 9
- Press F3 until you reach a prompt to confirm exiting SST, and press enter to exit SST and return to the main menu.
- VaryOn the line description by using the following command with the appropriate line description name used in Step 1
VRYCFG CFGOBJ(YOUR LIND) CFGTYPE(*LIN) STATUS(*ON) ASCVRYOFF(*YES)
. - Start TCP/IP interface that was noted on the previous topic on Step 9 by entering the command with appropriate internet address and Line description
ENDTCPIFC INTNETADR ('XXX.XXX.XXX.XXX') LIND (YOUR LIND)
.
Note: Disabling LSO is a temporary solution, there is no options from IBM to permanently disable LSO for now. Once we Disable the LSO from SST it will enable it self once we IPL the System or network adapter.
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