Cisco Systems UCS 5100, UCS 5108, N20C6508UPG manual Fabric Interconnect B Rear Port

Installation

Proper FEX and Fabric Interconnect Port Connectivity

The following figure shows an invalid connection from a FEX to two separate fabric interconnects.

Figure 15: Invalid Connection for the Server Chassis and two Cisco UCS 6120XP Fabric Interconnects

Fabric Interconnect A Rear

1	3	5		7	9	11	13	15	17	19	21	23	25	27	29	31		1	3	5	7	9	11	13	15
2	4	6		8	10	12	14	16	18	20	22	24	26	28	30	32		2	4	6	8	10	12	14	16
																				Fabric Interconnect B Rear
		1	3	5	7	9	11	13	15	17	19	21	23	25	27	29	31		1	3	5	7	9	11	13	15
		2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32		2	4	6	8	10	12	14	16
							Port 1								Port 1
							Port 2								Port 2

	Port 3			Port 3
	Port 4			Port 4
I/O Module	Slot 1	I/O	Module	Slot 2

Chassis 1 rear

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◦Both fabric interconnects should be wired identically: if port 1 on FEX 1 for a chassis goes to FI-A port 5, then port 1 on FEX 2 goes to FI-B port 5.

The following figure shows valid connections from FEXes in two chassis to two separate fabric interconnects. When you connect the server chassis to the fabric interconnect do not connect the FEXes to the fabric interconnect's expansion modules. While similar in appearance to the other

Cisco UCS 5108 Server Chassis Installation Guide

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