Ethernet  connectors 
Use  these  connectors  to  connect  the  server  to  a  network. 
Ethernet  transmit/receive  activity  LED 
This  LED  is  on  the  Ethernet  connector  on  the  rear  of  the  server.  When  this 
LED  is  lit,  it  indicates  that  there  is  activity  between  the  server  and  the 
network. 
Ethernet  link  status  LED 
This  LED  is  on  the  Ethernet  connector  on  the  rear  of  the  server.  When  this 
LED  is  lit,  it  indicates  that  there  is  an  active  connection  on  the  Ethernet 
port.
Server  power  features 
When  the  server  is  connected  to  an  ac  power  source  but  is  not  turned  on,  the 
operating  system  does  not  run,  and  all  core  logic  is  shut  down;  however,  the  server 
can  respond  to  remote  requests  to  turn  on  the  server. 
Turning  on  the  server 
Approximately  20  seconds  after  the  server  is  connected  to  ac  power,  the 
power-control  button  becomes  active,  and  you  can  turn  on  the  server  and  start  the 
operating  system  by  pressing  the  power-control  button. 
The  server  can  also  be  turned  on  in  any  of  the  following  ways: 
v  If  a  power  failure  occurs  while  the  server  is  turned  on,  the  server  will  restart 
automatically  when  power  is  restored. 
v  If  your  operating  system  supports  the  systems-management  software  for  an 
optional  Remote  Supervisor  Adapter  II  SlimLine,  the  systems-management 
software  can  turn  on  the  server. 
v  If  your  operating  system  supports  the  Wake  on  LAN
® 
feature,  the  Wake  on  LAN 
feature  can  turn  on  the  server. 
v  If  an  optional  Remote  Supervisor  Adapter  II  SlimLine  is  installed  in  the  server,  the 
server  can  be  turned  on  from  the  Remote  Supervisor  Adapter  II  SlimLine  user 
interface.
Note:
  When  4  GB  or  more  of  memory  (physical  or  logical)  is  installed,  some 
memory  is  reserved  for  various  system  resources  and  is  unavailable  to  the 
operating  system.  The  amount  of  memory  that  is  reserved  for  system 
resources  depends  on  the  operating  system,  the  configuration  of  the  server, 
and  the  configured  PCI,  PCI-X,  or  PCI  Express  options. 
Turning  off  the  server 
When  you  turn  off  the  server  and  leave  it  connected  to  ac  power,  the  server  can 
respond  to  requests  from  the  service  processor,  such  as  a  remote  request  to  turn 
on  the  server.  While  the  server  remains  connected  to  ac  power,  one  or  more  fans 
might  continue  to  run.  To  remove  all  power  from  the  server,  you  must  disconnect  it 
from  the  power  source. 
Some  operating  systems  require  an  orderly  shutdown  before  you  turn  off  the  server. 
See  your  operating-system  documentation  for  information  about  shutting  down  the 
operating  system. 
 
42  System  x3400  Types  7973,  7974,  7975,  and  7976:  Installation  Guide