Maintaining the EX9253 Routing Engine

Removing a Routing Engine from an EX9253 Switch

The Routing Engine (RE) in an EX9253 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). You can remove and replace it while the switch is running without turning off power to the switch or disrupting switching functions if RE graceful switchover is configured in the CLI. The REs are installed on the front panel. At least one RE must be installed in the switch. To ensure proper operation of the switch, you must install a replacement RE shortly after removing an RE from the chassis. The REs are installed in the slots labeled RE0 and RE1 on the front panel of the chassis.

• Ensure you understand how to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

• An ESD wrist strap

• A replacement RE or a cover panel for the RE slot

1. Take the RE offline by issuing one of the following commands:

   • To remove the primary RE:

     user@switch>request vmhost halt

   • To remove the backup RE:

     user@switch>request vmhost halt slot-number

     You must specify the number of the slot in which the RE is installed—RE0 or RE1.

   • To remove both the REs:

     user@switch>request vmhost halt routing-engine both
2. Place an electrostatic bag or antistatic mat on a flat, stable surface.
3. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
4. Open the ejector handle on the RE outward to unseat the RE.
5. Grasp the ejector handle, and slide the RE about halfway out of the chassis.

   Figure 1: Removing an RE

   

6. Place one hand underneath the RE to support it, and slide it completely out of the chassis.
7. Place the RE on the antistatic mat or into an antistatic bag.
8. Either replace the RE promptly or install a cover panel over the empty slot.

Installing a Routing Engine in an EX9253 Switch

The Routing Engine (RE) in an EX9253 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). You can remove and replace it while the switch is running without turning off power to the switch or disrupting switching functions. The REs are installed on the front panel. The REs are installed in the slots labeled RE0 and RE1 on the front panel of the chassis.

• Ensure you understand how to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

• An ESD wrist strap

• A Phillips (+) screwdriver, number 2

1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
2. Taking care not to touch RE components, remove the RE from its bag.
3. Lift the RE, and position it in the chassis with the faceplate facing you and the sides of the RE aligned with the guides in the RE slot on the switch chassis (see Figure 2).
4. Slide the RE into the chassis until you feel resistance, carefully ensuring that it is correctly aligned.
5. Grasp the ejector handle and gently slide the RE fully into the slot using both hands until the RE is fully seated.
6. Verify that the OK/FAIL LED on the RE faceplate is lit steadily. If the OK/FAIL LED is lit red, remove and install the RE again.
7. Check the status of the RE by issuing the CLI command show chassis routing-engine command:
   user@host> show chassis routing-engine

   Figure 2: Installing an RE