IBM Storwize V7000 Unified Problem Determination Manual page 213

The active management node on the file module is not able to ssh CLI commands
to the control enclosure until you change the management gateway setting to
match the setting on the control enclosure. Use the lsnwmgt CLI command to
show you the current management IP address setting on the file modules.
[kd52v6h.ibm]$ lsnwmgt
Interface Service IP Node1 Service IP Node2 Management IP Network
ethX0 9.71.16.204
EFSSG1000I The command completed successfully
Use the chnwmgt CLI command to change the managed gateway IP address
setting on the file modules.
[kd52v6h.ibm]$ chnwmgt --gateway 9.71.16.1
EFSSG0015I Refreshing data.
EFSSG1000I The command completed successfully
The active management node on the file module should now be able to ssh CLI
commands to the control enclosure again. You should be able to access the
management GUI or CLI from a computer, which is on a different subnet or
different Ethernet switch to the Storwize V7000 Unified system. The link to the
management GUI from the InitTool.exe panel should now work.
satask.txt commands
This topic identifies the commands that can be run from a USB flash drive.
If you are creating the satask.txt command file by using a text editor, the file
must contain a single command on a single line in the file. The commands that
you use are the same as the service CLI commands except where noted. Not all
service CLI commands can be run from the USB flash drive. The satask.txt
commands always run on the node that the USB flash drive is plugged into.
Reset service IP address and superuser password command:
Use this command to obtain service assistant access to a node canister even if the
current state of the node canister is unknown. The physical access to the node
canister is required and is used to authenticate the action.
Syntax
satask chserviceip -serviceip ipv4
satask chserviceip -serviceip_6 ipv6
satask chserviceip
Parameters
-serviceip
(Optional) The IPv4 address for the service assistant.
-gw
(Optional) The IPv4 gateway for the service assistant.
9.71.16.205 9.71.16.216
-gw ipv4 -mask ipv4
-gw_6 ipv6 -prefix_6 int
-default
-resetpassword
Gateway
255.255.255.0 9.71.16.2
-resetpassword
-resetpassword
Chapter 5. Control enclosure
VLAN ID
189