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Appendix A, Acceptance Test Procedure
Verify System Redundancy
6.
VERIFY SYSTEM REDUNDANCY
This section will address the redundancy features of the MX2800. The MX2800 supports redundancy of
both the power supply and controller cards. The information gathered in
inventory) will be utilized to determine the type of tests. The following sections describe the tests for
various configurations.
Power Supply Redundancy
When installed in a bay, the MX2800 can be wired to have either one or two –48VDC power feeds (A and
B). In addition, the MX2800 chassis can be equipped with either one or two power supply cards. Test
scenarios for the two most common configurations can be found below:
Dual Power Feed, Single Power Supply Card
When the MX2800 is equipped with only a single power supply card, there is no protection against a
failure of the card itself. However the single power supply card is capable of utilizing the A and B power
feeds to protect against a failure in one of the power sources feeding the shelf. To verify that the MX2800
is properly utilizing the A and B power feeds, the following procedure is suggested:
1. With the MX2800 installed and operating normally, go to the fuse panel at the top of the bay, and
remove the fuse corresponding to the "A" power feed for the MX2800 shelf. This should have no
effect on the operation of the shelf, as the MX2800 is now operating on the "B" power feed.
2. Reinsert the fuse for the "A" power feed.
3. Remove the fuse corresponding to the "B" power feed for the MX2800 shelf. There should be no effect
on the operation of the shelf, as the MX2800 is now operating on the "A" power feed.
4. Reinsert the fuse for the "B" power feed.
Dual Power Feed, Dual Power Supply Cards
When the MX2800 is equipped with two power supply cards, the shelf is protected against a failure of
either of the power supply cards, as well as a failure in one of the power sources feeding the shelf. Use the
following procedure to demonstrate the operation of this fully redundant configuration:
1. With the MX2800 installed and operating normally, open the front panel and remove the "A" power
supply card (the one on the left). This should have no effect on the operation of the shelf, as the
MX2800 is now operating on the "B" power supply.
2. Go to the fuse panel at the top of the bay and remove the fuse corresponding to the "A" power feed.
This should have no effect on the operation of the shelf, as the "B" power supply is now running on the
"B" power feed.
3. Reinsert the fuse for the "A" power feed.
4. Remove the fuse corresponding to the "B" power feed to the shelf. This should have no effect on the
operation of the shelf, as the "B" power supply is now operating on the "A" power feed.
5. Reinsert the fuse for the "B" power feed.
6. Reinsert the "A" power supply into the MX2800 chassis.
A-8
MX2800 STS-1 User Manual
Verify Installed Options
61204659L1-1A
(card
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