Ref: 17350009
Title: Identifying and Changing the System Protocol on an NCS/AT
date: 4/3/91

Copyright 3Com Corporation, 1991.  All rights reserved.

The following information should be used only as a corrective action.
Changing protocol type normally requires rebooting your NCS/AT to take
effect.  In the case of switching from XNS to TCP, you should run
"setipaddr" to set an IP address for the NCS (ipadr.ncs), or if the IP
address entered differs from the existing IP address; the NCS will be
rebooted automatically to register the new IP address.


Determining protocol type:

If you do not know what protocol type (XNS/TCP) your NCS/AT is running,
enter the NCS Utility mode and type "idprotocol".

idprotocol looks at the /usr/NCS/BIN/sysconf.ncs file and extracts the
protocol.  The protocol type will appear as the first three letters of the
line following the idprotocol command.  (The "catalog" command will not
reveal this information.)


Changing protocol type:

While performing maintenance requiring protocol selection (such as
upgrading from System Software 2.1 to 2.1.1), if you mistakenly
select the wrong protocol type, you can ask the NCS to allow you to make
the selection again.  Log in as user "ncs", enter the NCS Utility mode,
and type "set_sysconf".

The NCS will prompt you for the protocol type.  Type the protocol and
press Enter.  The protocol will be saved in sysconf.ncs.  You can
check that the file was updated by checking the file date and time
against the current date and time reported by the NCS.

set_sysconf can also be executed with the -r (reset) option.  If you use
the -r option, the protocol is cleared from "sysconf.ncs".  The next
time the NCS boots, it will request an IP address and subnet mask,
allowing you to alter the NCS address.

Note:  The "idprotocol" command is available to all users.  The
"set_sysconf" command can be run by a user, but changes can be
written to sysconf.ncs only by user ncs.  You may want to change the
access permissions of these commands for greater security.

