Verifying SIB Failure
To verify SIB failure:
Check the SIB Connection
Purpose
To verify SIB failure by checking the SIB connection.
Action
To check the SIB connection, make sure that it is properly seated in the midplane. Ensure that none of the pins are bent. Check the thumbscrews on the ejector locking tabs. Issue the following command:
Check the SIB Fuses
Purpose
To verify SIB failure by checking the SIB fuses.
Action
The M320 router requires fuses for the SIBs. The fuses for the Control Board, SIBs, and FPCs are located in the rear of the midplane behind the power supply in slot PEM0. When the fuse for a SIB blows, the SIB stops functioning even though it is installed correctly and the power supplies are providing power to the router.
Figure 1 shows the location of the fuses in the rear of the midplane for the SIBs. (The labels shown in the figure do not appear on the actual fuses—the clear cover on every fuse reads BUSS GMT-X—and might not match the labels on the midplane. Ignore the labels on the midplane.)
Figure 1: SIB Fuses
Perform a SIB Swap Test
Purpose
To verify SIB failure by performing a SIB swap test.
 | Note: Before performing a swap test, always check for bent pins in the midplane and check the SIB for stuck pins in the connector. Pins stuck in the component connector can damage other good slots during a swap test SIBs are hot-insertable and hot-removable. |
Action
To perform a swap test on a SIB:
- Take the SIB offline by doing one of the following
- Use the following command:
user@host> request chassis sib slot number offline
- Press the online/offline button on the SIB faceplate. Press and hold down the button until the green ONLINE LED goes out (about 5 seconds).
- Use the following command:
- Have ready an antistatic mat placed on a stable, flat surface.
- Attach an electrostatic discharge (ESD) strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Loosen the captive screws on the ejector handles on each side of the SIB faceplate.
- Flip the ejector handles outward to unseat the SIB.
- Grasp both ejector handles, pull firmly on the SIB, and slide the SIB about three-quarters of the way out of the chassis
- Move one of your hands underneath the SIB to support it, and slide it completely out of the chassis.
- Hold the replacement SIB by placing one hand underneath to support it and the other hand on one of the ejector handles on the SIB faceplate.
- Carefully align the sides of the SIB with the guides inside the chassis.
- Slide the unit into the chassis, carefully ensuring that it is correctly aligned.
- Grasp both ejector handles and press them inwards to seat the SIB.
- Tighten the captive screws on the ejector handles.
- Bring the SIB online by doing one
of the following
- Use the following command:
user@host> request chassis sib slot number online
- Press the offline/online button until the green ONLINE LED lights to bring the SIB online.
- Use the following command:
