JSOC/doc/dcs2_convert_to_0_or_1.txt - diff

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version 1.1, 2008/11/07 16:56:16

version 1.2, 2008/12/19 16:35:45

Line 12 dcs spare (dcs2).

run "ifdown eth3" as root.

2. Log in the spare (dcs2) as root and run the command

"/etc/sysconfig/network/XXX-up" where XXX is either

"ifdown eth3".

AIA or HMI depending on which dcs system it is about

to replace.

3. Open the front door of the NASA rack, unplug the red

3. Open the front door of the NASA rack and examine the

ethernet cable labelled "dcsx XXX ..." where x is 0

three red ethernet cables. Normally the dcs0 cable

for XXX==AIA or 1 for XXX==HMI, and plug the loose

should be on port 12 of switch x20b, the dcs1 cable

ethernet cable labelled "dcs spare" into the same port

should be on port 3 of switch x20a, and the dcs2

vacated by the cable you've just unplugged.

cable should be on port 4 of switch x20a. To fail-

over HMI, unplug the dcs1 cable and move the dcs2

cable into port 3, switch x20a. To fail-over AIA,

unplug the dcs0 cable and move the dcs2 cable to

port 12, switch x20b.

4. To restore the original dcs2 to itself do:

4. Run "/etc/sysconfig/network/XXX-up", where XXX is

either HMI or AIA, on dcs2.

/etc/sysconfig/network/XXX-up/MYSELF-up

And don't forget to move the cable back to the dcs0 or dcs1.

To restore the original dcs2 to itself, run "ifdown eth3",

move its red ethernet cable back to port 4, switch x20a,

and run /etc/sysconfig/network/MYSELF-up.

To put the origina HMI or AIA machine back online, and plug

its red ethernet cable back in its original port (port 3,

switch x20a for HMI; port 12, switch x20b for AIA). If

the machine has not been rebooted since it went offline,

run "ifup eth3".

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