Server rear panel - model 4040
The rear panel of the server features numerous ports, connectors, switches, and LEDs.
| Item | Connectivity | Quantity | Description |
| 1 | Clustering ports 10 GbE | 2 |
For cluster management and heartbeat, connect to:
|
| 2 | 10 GbE network ports | 2 | Connection to external 10 Gbps Ethernet data network. |
| 3 | Gigabit Ethernet network ports | 6 | Connection to external Ethernet data network. |
| 4 | 10/100 Ethernet port | 5 | Connection to private management network. |
| 5 | Storage or FC switch | 4 | Connection to disk arrays or (where present) to the FC switches. |
| 6 | n/a | 3 | Status LEDs (NVRAM, power, and server), and Power and Reset buttons. |
| 7 | Power supply units:
PSU 1 PSU 2 | 2 | Connect to the rack's Fault group:
|
| 8 | I/O ports | 2 | Keyboard (purple) and mouse (green) ports. (Reserved for Customer Service Engineer access only.) |
| 9 | I/O ports | 2 | USB port. (Reserved for Customer Service Engineer access only.) |
| 10 | RS-232 | 1 | Management interface. (Reserved for Customer Service Engineer access only.) |
| 11 | Video port | 1 | Video management interface port. (Reserved for Customer Service Engineer access only.) |
| 12 | ETH0 1000baseT Ethernet (gray logo) | 1 | External system management. Connect to the customer's management switch. |
| 13 | ETH1 1000baseT Ethernet (yellow logo) | 1 | Management port. Connect to the rack's internal Ethernet switch. |
Rear panel server LED and button locations
The rear panel of the server contains three (3) status LEDs that indicate server status and two (buttons) that are used to power up and reset the server.
| Item | Description |
| 1 | NVRAM battery backup status LED |
| 2 | Power status symbol and LED |
| 3 | Server status LED |
| 4 | Reset button |
| 5 | Power button |
GE Ethernet network ports
The GE Ethernet Network ports are used to connect the server or cluster node to the customer's data network (also called the public network), and these ports may be aggregated into a single logical port (refer to the Network Administration Guide for more information on creating aggregations). GE ports operate at speeds of up to one (1) gigabit per second, and require the use of a standard RJ45 cable connector.
The GE Customer Ethernet Network ports are labeled as shown next:
Once connected, each GE port has two indicator LEDs; one green and one amber. These LEDs provide link status and network activity status information as follows:
| Status/Activity (Per Port) | Meaning | ||
| Status | Green (On, not flashing) | 1 Gbps link present | |
| Green Flashing | 1 Gbps link standby in a redundant configuration | ||
| Green Off | No link | ||
| Activity | Amber Flashing | Network activity | |
| Amber Off | No network activity | ||
Rear panel LED state descriptions
The NVRAM, power, and server status LEDs indicate whether the server is powered, its operational state, and whether the NVRAM is currently being protected by the super capacitor’s backup power. The way an LED flashes provides further information about what is currently occurring.
NVRAM Status LED (Green/Amber)| State | Meaning |
| Green (solid) | Normal operation |
| Amber (solid) | The NVDIMM or Supercapacitor backup energy source is faulty. |
| Off | Disabled or system powered down. The NVDIMM may contain data in internal flash memory that will be restored on boot. |
| LEDs | Meaning |
| Green | Normal operational mode of an active cluster node. |
| Slow flash (once every three seconds) | The system has been shut down. |
| Medium flash (once every .8 seconds) | The server is available to host file services but is not currently doing so. This also occurs if no EVS is configured, or if all EVSs are running on the other node in a cluster. |
| Fast flash (five flashes per second) | The server is rebooting. |
| Off | The server is not powered up. |
| LEDs | Meaning |
| Amber | Critical failure and the server is not operational. |
| Slow flash (once every three seconds) | System shutdown has failed. Flashes once every three seconds. |
| Medium flash (once every .8 seconds) | The server needs attention, and a non-critical failure has been detected, for example, a fan or power supply has failed. Flashes once every .8 seconds. |
| Off | Normal operation. |
10/100 private Ethernet ports
The 10/100 Private Ethernet Network ports function as an unmanaged switch for the private management network (refer to the Network Administration Guide for more information on the private management network). These ports are used by the server and other devices (such as an external SMU and other cluster nodes) to form the private management network. There are no internal connections to the server from these ports; instead, when joining a server to the private management network, you must connect from one of these ports to the management interface port on the server.
The 10/100 ports operate at speeds of up to 100 megabits per second, and require the use of a standard RJ45 cable connector.
The 10/100 Private Management Ethernet Network ports are labeled as shown next: 
Once connected, each 10/100 port has two indicator LEDs; one green and one amber. These LEDs provide link status and network activity status information as follows:
| Status/Activity (Per Port) | Meaning | ||
| Status | Green (On, not flashing) | 10 or 100 Mbps link present | |
| Green Off | No link | ||
| Activity | Amber Flashing | Network activity | |
| Amber Off | No network activity | ||