IBM N6000 Series Installation And Setup Instructions page 20

Controller B/Loop 1
Module A
Module B
Controller A/Loop 1
Controller
A
Controller
B
Figure 11. Cabling Channel B paths in high-availability (active/active) configuration
3. Cable Controller B port 0a to the Controller A/Loop 1 expansion unit module B ESH4 or AT-FCX In
port. See 3 in Figure 11.
4. Cable Controller A port 0c to the Controller B/Loop 1 expansion unit module B ESH4 or AT-FCX In
port. See 4 in Figure 11.
5. For any additional expansion units in a loop, connect the expansion unit module A Out port to the
next expansion unit's module A In port. Repeat for module B.
Dual-path Fibre Channel cabling
Use these instructions to implement dual-path Fibre Channel cabling in a high-availability (active/active)
configuration.
This step is optional. You must have ordered the "Dual-Path Fibre Channel Cabling" feature and/or
additional fiber cables and SFP Gigabit Interface Converters (GBICs) to implement this feature. Dual-path
Fibre Channel cabling only applies to high availability (active/active) A20/A21/A22 models. The purpose
of dual-path Fibre Channel cabling is to provide each controller node in a high availability (active/active)
configuration with redundant Fibre Channel paths (Loop A and Loop B) to each loop of disk storage
expansion units. It improves reliability and availability by providing redundant Fibre Channel paths from
each node of a high availability (active/active) configuration model to each loop of storage expansion
units.
Two additional SFP GBICs and two Fibre Channel cables are used to connect the last storage expansion
unit in a loop of storage expansion units to the other node of the high availability (active/active)
configuration.
14
OUT
PSU
IN OUT
OUT
PSU
IN OUT
OUT
PSU
IN OUT
OUT
PSU
IN OUT
PSU
PSU
6.5.1
3
IN
PSU
IN
PSU
IN
PSU
6.5.2
IN
PSU
0a 0b 0c 0d
0a 0b 0c 0d
4