Problem Report: ucrc2-m1-e1 is down
Posted by postprob on January 21, 2010 at 06:08 AM
Problem: ucrc2-m1-e1 is down Cause: unknown Affects: unknown Started: 01/20/2010 06:38 PM Resolved: 01/21/2010 07:18 AM
Notes:
Technician is on-site working on the problem.
Problem started at 06:38 P.M..
Problem solved at 07:18 A.M..
1. In the Bingham Hub,
the first one of two Cisco Catalyst C6509
Distribution-Level Routers, Bingham-H0-E1,
its first one of two 2500-Watts Power-Supplies Failed.
2. In the Bingham Hub,
the first one of two Emerson/Liebert UPSs,
Bingham-H0-U1, its Power Distribution Unit, PDU Failed.
3. In the Bingham Hub, a power-strip, which runs off of
this particular PDU, it lost its electrical power,
at around six-thirty, this Wednesday Evening, or
very early last night.
4. In the Bingham Hub, an Allied-Telesyn network switch,
which runs off of this particular power-strip,
it lost its electrical power, at about the same time.
5. This particular network switch, it also does
the FO/UTP media conversion for the two up-links,
for the Cisco Catalyst Switch, UCRC2-M1-E1, which
provides the Local Area Network, for the UCRC2 Building.
6. So therefore, the UCRC2 Building, it lost its two
network connections to the Local Area Network, for
the CWRU, at around the same time.
7. However, we did not discover the root cause or
the source of the problem, until early this morning.
8. So therefore, first
we moved this particular power-strip,
to the Bingham-H0-U2's PDU,
from the Bingham-H0-U1's PDU.
9. And then the network connectivity was fully-restored,
for the UCRC2 Building, for the CWRU's local area network.
10. None of this work affected their network connectivity,
for the UH's local area network, in the UCRC2 Building.
11. An electrical circuit breaker, 208-Volts AC, was
tripped, early last night.
12. An electrical technician, he reset this electrical
circuit breaker this morning.
13. We replaced the failed power-supply with a spare.
14. We replaced the failed PDU also with a spare.
15. And thus, by these ways, we brought the UPS back to
life, this morning, and everything is back to where they
should be now.
Created: 01/21/2010 06:08:07 by lab17
Updates: 01/21/2010 07:28:58 by euw, 01/21/2010 14:14:18 by euw