Channel Path List Row 1 of 3 More: Command ===> _______________________________________________ Scroll ===> CSR Select one or more channel paths, then press Enter. To add use F11. Processor ID . . . . : MUSCA Musca Configuration mode . : LPAR Channel Subsystem ID : 2 CHID+ Dyn Entry + / CHPID AID/P Type+ Mode+ Sw+ Sw Port Con Mng Description _ E0 12/1 CS5 SPAN __ __ __ Y No FC#0172 ICA SR 2 Links _ E4 16/1 CS5 SPAN __ __ __ Y No FC 0172 ICA SR 2 Links _ E8 124/1 CL5 SPAN __ __ __ N No FC 0433 Coupling Express LR 

9. Define another CL5 CHPID as ED to the same LPARs as CHID=144, Port=1 (see Figure 14-17). 

## 14.2.5 Defining a Coupling Facility link with CL5 CHPIDs 

Channel Path List Row 1 of 4 More: Command ===> _______________________________________________ Scroll ===> CSR Select one or more channel paths, then press Enter. To add use F11. Processor ID . . . . : MUSCA Musca Configuration mode . : LPAR Channel Subsystem ID : 2 CHID+ Dyn Entry + / CHPID AID/P Type+ Mode+ Sw+ Sw Port Con Mng Description _ E0 12/1 CS5 SPAN __ __ __ Y No FC 0172 ICA SR 2 Links _ E4 16/1 CS5 SPAN __ __ __ Y No FC 0172 ICA SR 2 Links _ E8 124/1 CL5 SPAN __ __ __ N No FC 0433 Coupling Express LR _ ED 144/2 CL5 SPAN __ __ __ N No FC 0433 Coupling Express LR 

The only way to define a CL5 CHPID to another CL5 CHPID is direct connected. 

Creating a CF link by using CL5 CHPIDs includes the following considerations: 

GLYPH<SM590000> The Coupling Express LR connection is a physical cable between two FC 0433 cards on the same or different processors. 

GLYPH<SM590000> Up to four logical CHPIDs per port can be defined over that physical connection. 

GLYPH<SM590000> How many CL5 CF links are required to provide enough primary and secondary links and coupling bandwidth. 

GLYPH<SM590000> Which z/OS LPARs on the same or different processors need access to the CF LPARs. 

GLYPH<SM590000> CF links also provide STP connectivity for a CTN between processors and a sysplex. 

GLYPH<SM590000> Our example connects two CL5 CHPIDs (E8 and ED) on the same processor. 

