Exchange an Ethernet cable

Before you begin

Use approved ESD procedures to prevent damage.

Attention:

This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.

Notes:

All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
The replacement of the Ethernet switch is a manual process. There is no GUI code-driven process to manage the resource and help guide you through the repair.
There are two private networks: "Gray" and "Black." One of the two networks must always be functional to all connected nodes.
The private networks are automatically checked every few minutes by a microcode driven "heartbeat" communication process that checks HMC-to-CEC LPAR as well as HMC-to-HMC communications. A serviceable event is opened if a problem is found.
There is an HMC GUI network topology tool that displays the CEC nodes and their "health" status. Running it does not cause a serviceable event to be created.
There is not an HMC GUI tool to test the "health" of the intelligent power distribution units (iPDUs). Instead, MAP7202 Determining the network status of the iPDUs is used for testing.

If you do not know the location of both ends of the cable to be replace, refer to Display cable diagrams.
Disconnect the Ethernet cable at both ends.
Remove the cable retention hardware as needed and remove the cable from the rack.

If the new cable FRU came with a location code label sheet, find and apply labels that match the locations code labels on the cable that was removed.
Route the cable and connect both ends.
Reinstall the cable retention hardware.
To verify the new cable is connected properly, observe the Ethernet port green LED indicator at each end of the cable.

Are the LED indicators at both ends on or flashing?
- Yes. Go to the next step.
- No. MAP7200 Entry point for storage facility private network problems.
Exit this service information center parts exchange procedure and return to the procedure that sent you here.

To understand the Ethernet private network point-to-point cable connections, see the following cable diagrams:

Figure 1. Private network, black and gray (Models A0x)

Figure 2. Private network, black (Models A0x)

Figure 3. Private network, gray (Models A0x)