15
5.6
Note:
This step is optional. You must have ordered the "Dual-Path FC
Cabling" feature and/or additional fiber cables and SFP GBICs to implement
this feature. Dual-path FC cabling only applies to dual-node clustered A20
models. The purpose of dual-path FC cabling is to provide each node in a dual-
node cluster with redundant FC paths (Loop A and Loop B) to each stack of
expansion units. It improves reliability and availability by providing redundant
FC paths from each node of a dual-node cluster model to each stack of storage
expansion units.
The additional SFP GBICs (two) and FC cables (two) are used to connect the
last storage expansion unit in a stack of storage expansion units to the other
node of the dual-node cluster.
PSU
PSU
IN
OUT
IN
OUT
PSU
PSU
IN
OUT
IN
OUT
PSU
PSU
N3300
0a
e0a
e0b
0b
CM-B
e0a
e0b
10101
10101
B
A
B
A
0a 0b
EXN
EXN
CM-A
Do the following for each stack of storage expansion units:
5.6.1 Insert an SFP GBIC into the FC OUT port of upper controller A of the
last disk storage expansion unit in the stack of expansion units.
5.6.2 Insert an SFP GBIC into the FC OUT port of lower controller B of the
last disk storage expansion unit in the stack of expansion units.
5.6.3 Connect a Fibre Channel cable from the FC OUT port on the upper
controller A of the last disk storage expansion unit of the stack to FC
port 0b of the lower processor controller module (CM-B) of the N3300.
5.6.4 Connect a Fibre Channel cable from the FC OUT port on the lower
controller B of the last disk storage expansion unit of the stack to FC
port 0b of the upper processor controller module (CM-A) of the N3300.
5.6.3
5.6.4