| 12 |
|
run "ifdown eth3" as root. |
| 13 |
|
|
| 14 |
|
2. Log in the spare (dcs2) as root and run the command |
| 15 |
< |
"/etc/sysconfig/network/XXX-up" where XXX is either |
| 16 |
< |
AIA or HMI depending on which dcs system it is about |
| 17 |
< |
to replace. |
| 15 |
> |
"ifdown eth3". |
| 16 |
|
|
| 17 |
< |
3. Open the front door of the NASA rack, unplug the red |
| 18 |
< |
ethernet cable labelled "dcsx XXX ..." where x is 0 |
| 19 |
< |
for XXX==AIA or 1 for XXX==HMI, and plug the loose |
| 20 |
< |
ethernet cable labelled "dcs spare" into the same port |
| 21 |
< |
vacated by the cable you've just unplugged. |
| 17 |
> |
3. Open the front door of the NASA rack and examine the |
| 18 |
> |
three red ethernet cables. Normally the dcs0 cable |
| 19 |
> |
should be on port 12 of switch x20b, the dcs1 cable |
| 20 |
> |
should be on port 3 of switch x20a, and the dcs2 |
| 21 |
> |
cable should be on port 4 of switch x20a. To fail- |
| 22 |
> |
over HMI, unplug the dcs1 cable and move the dcs2 |
| 23 |
> |
cable into port 3, switch x20a. To fail-over AIA, |
| 24 |
> |
unplug the dcs0 cable and move the dcs2 cable to |
| 25 |
> |
port 12, switch x20b. |
| 26 |
> |
|
| 27 |
> |
4. Run "/etc/sysconfig/network/XXX-up", where XXX is |
| 28 |
> |
either HMI or AIA, on dcs2. |
| 29 |
|
|
| 25 |
– |
4. To restore the original dcs2 to itself do: |
| 30 |
|
|
| 31 |
< |
/etc/sysconfig/network/XXX-up/MYSELF-up |
| 31 |
> |
To restore the original dcs2 to itself, run "ifdown eth3", |
| 32 |
> |
move its red ethernet cable back to port 4, switch x20a, |
| 33 |
> |
and run /etc/sysconfig/network/MYSELF-up. |
| 34 |
|
|
| 35 |
< |
And don't forget to move the cable back to the dcs0 or dcs1. |
| 35 |
> |
To put the origina HMI or AIA machine back online, and plug |
| 36 |
> |
its red ethernet cable back in its original port (port 3, |
| 37 |
> |
switch x20a for HMI; port 12, switch x20b for AIA). If |
| 38 |
> |
the machine has not been rebooted since it went offline, |
| 39 |
> |
run "ifup eth3". |
