IBM TotalStorage SAN140M, Installation And Service Manual

Page: 149 / 428

117 Chapter 3: Maintenance analysis procedures (MAPS)
c. Ensure Ethernet cables are not damaged. If damaged, replace the
cables.
Was the maintenance action successful?
NO YES
↓
The management server connection is restored. Exit MAP.
9
Does the configuration use multiple daisy-chained Ethernet hubs?
YES NO
↓
Go to step 11 .
10
Verify hubs are correctly daisy-chained.
a. Top hub - Ensure an RJ-45 Ethernet cable connects to port 24 and
the medium-dependent interface (MDI) switch is set to MDI (in)
(
Figure 48 (1)).
b. Middle hub - Ensure the cable from the top hub connects to port
12, the cable from the bottom hub connects to port 24, and the
MDI switch is set to MDI (in) ( Figure 48 (2)).
c. Bottom hub - Ensure the cable from the middle hub connects to
port 12 and the MDI switch is set to MDIX (out) ( Figure 48 (3)).
Figure 48
Daisy-chained Ethernet hubs
i140M015
1
2
3