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Measurement Specialties Inc. NetScanner System (9016, 9021, & 9022) User’s Manual

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CHANGE MODULE’S IP ADDRESS RESOLUTION METHOD & RE-BOOT

(UDP/IP Command ‘psirarp’)

Purpose: To change (toggle) the current IP address resolution state (ipaarpst) of a specified

module, and then unconditionally “re-boot” it.

Command

“psirarp ethadr”

where ethadr is the Ethernet

address of the specified module in

the following special hex-digit

format

‘xx-xx-xx-xx-xx-xx’

Response

none (module re-boots)

Description: When a module receives this broadcast command, (by continuously monitoring

port 7000) it responds by toggling its current ARP method to one of two states:

dynamic resolution or static resolution. Then it restarts its firmware. The result is

essentially the same as a power-up restart, in that any TCP/IP connection is lost,

and the module returns to its normal startup state. However, if it used the static

resolution method before it received this command, after the re-boot, it will not

have a valid IP address until an external network server (RARP or BOOTP)

provides it with one. However, executing the command a second time will restore

it to using its original statically-assigned IP address (after another re-boot

finishes).

Just as for the “psireboot” command, the host must wait long enough for the

re-boot process to be completed before it can again request a connection to the

module.

Example:

• Reconfigure a specified module on the network so that it uses its “other” IP

address resolution method, and also re-boot it. Presumably, the host knew the

module’s current state (iparpst) as a result of a recent Network Query response

from the module.

“psirarp 00-E0-8D-00-00-01”

Response:

(None)

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Pressure Systems 9022 Manuel d'utilisateur Page 110