Foundry Networks FGS624XGP, FGS648P-POE Power Source Interruptions, Mean Time Between Failure

FastIron GS Compact Layer 2 Switch Hardware Installation Guide

Table 6.3: Chassis Regulatory Compliance (Continued)

Description	Certifications
Safety	EN 60950-1
	CAN/CS-C22.2 No. 60950-1
	EN 60825-1, Safety of Laser Products - Part 1
	EN 60825-2, Safety of Laser Products - Part 2
	IEC 60950-1
	UL 60950-1

Power Source Interruptions

Table 6.4 shows how the FastIron GS protects against power surges and power drops.

Table 6.4: Chassis Power Surge and Drop Protection

Property	Protection Mechanism
Power surge	MOV and Spark Gap protection
Power drop (<=1 second)	An AC loss of >15ms will cause the power supply
	to shut down due to input under-voltage
Maximum power draw	96 watts with 2-port 10-Gigabit uplinks
	82 watts without 2-port 10-Gigabit uplinks

Mean Time Between Failure

Table 6.5 lists the Mean Time Between Failure (MTBF) for the FastIron GS and the 10-GbE uplink modules. The MTBF is the average estimated time, in units of hours, before a hardware failure may occur.

Table 6.5: MTBF for the FastIron GS and 10-GbE modules

Configuration / Module		Temperature	MTBF (hours)
			Without POE	With POE
24-port POE ready + 4 SFPs + 2-port 10-GbE		40o Celsius	150,879	142,217
module + 2	XFPs + 1 power supply
24-port POE ready + 4 SFPs + 2-port 10-GbE		40o Celsius	267,411	241,356
module + 2	XFPs + 2 powers supplies
48-port POE ready + 4 SFPs + 2-port 10-GbE		40o Celsius	133,825	120,775
module + 2	XFPs + 1 power supply
48-port POE ready + 4 SFPs + 2-port 10-GbE		40o Celsius	218,140	196,401
module + 2	XFPs + 2 power supplies
2-port 10-GbE XFP module		40o Celsius	1,597,580	N/A
2-port 10-GbE CX4 modulea		40o Celsius		29,673,590

6 - 4 © 2007 Foundry Networks, Inc. September 2007