Installing an SRE Module in an EX8208 Switch

You can install either one or two Switch Fabric and Routing Engine (SRE) modules in an EX8208 switch. The SRE modules install horizontally in the front of the chassis in the slots labeled SRE0 and SRE1.

Note: We recommend that you install two SRE modules for redundancy. If you install only one SRE module, we recommend that you install it in the slot SRE0.

Caution: Do not lift the SRE module by holding the ejector levers. The levers cannot support the weight of the module. Lifting the modules by the levers might bend the levers, and the bent levers will prevent the SRE module from being properly seated in the chassis.

Before you begin installing an SRE module in an EX8208 switch:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to install an SRE module:

• Electrostatic discharge (ESD) grounding strap
• Phillips (+) screwdriver, number 2

To install an SRE module in an EX8208 switch (see Figure 1):

1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
2. Taking care not to touch the leads, pins, or solder connections, pull the SRE module out from the bag.
3. Pull both the ejector levers outward, away from the faceplate of the SRE module, until they go no further.
4. If the slot has a cover panel on it, unscrew the two screws on either side of the cover panel counterclockwise using the Phillips (+) screwdriver, number 2. Remove the cover panel. Save the cover panel for later use.
5. Carefully align the sides of the SRE module with the guides inside the chassis.
6. Ensuring that the SRE module is correctly aligned, carefully slide it into the chassis until you feel resistance.
7. Push both the ejector levers towards the faceplate of the SRE module until the levers are flush against the faceplate and are fully engaged.
8. Tighten the screws, one on each side of the SRE module, by turning them clockwise using the Phillips (+) screwdriver, number 2. Ensure that the SRE module is fully seated in the chassis. It must be fully seated in order for it to be powered up.
9. Verify that the SRE module is installed correctly and functioning normally by checking the LEDs on the faceplate of the SRE module. The ON LED and ST LED should be lit steady green a few minutes after the SRE module is installed.

   If the ON LED is unlit, verify that there are enough power supplies installed. See Calculating Power Requirements for an EX8208 Switch. If more power supplies are needed, install additional power supplies. See Installing an AC Power Supply in an EX8200 Switch. If there are enough power supplies in the switch, remove and install the SRE module again. See Removing an SRE Module from an EX8208 Switch.

   If the ST LED is lit steady yellow, the SRE module has failed. Remove the module and install a new SRE module. See Removing an SRE Module from an EX8208 Switch.

Figure 1: Installing an SRE Module in an EX8208 Switch