Znyx Networks bh5700 manual Hardware Subsystem

6.	Isolation Transformer	13.	Isolation Transformers
7.	Power Supply	14.	4 Port PHY

Hardware Subsystem

In the following tables, refer to the identified component-area numbers on indicated in the pictures in the proceeding section. The indications of malfunction may be identified either during normal operation, or in response to a specific test. The various tests that may be initiated are shown in subsequent sections.

The information is equally applicable to both the Base Interface and the Fabric Interface switch subsystems unless otherwise noted.

Base	ZMC 0	ZMC 1	Hardware		Indications of Malfunction
	#	#	Subsystem
4	3		CPU	A CPU failure may be indicated by any of the
				following:
				• A failure to run the Power-On-Self-
					Test (POST)
				• A failure to boot the OpenArchitect
					kernel
				•	Kernel panics
				Loss of CPU response sometime after
				operation is initiated
5		3	RAM	The Ethernet Switch Blade uses SDRAM for
				the primary CPU memory system. A failure of
				RAM will generally cause any of the
				following:
				•	Kernel panics
				• Loss of CPU response
				•	Unexplained software failures
1	8		ROM	The Flash ROM subsystem on the Ethernet
				Switch Blade is used only on boot-up. The
				contents are decompressed and copied to RAM
				memory for further use. A ROM failure will
				generally cause a failure in the boot process.
9, 10		6, 7	Switch Fabric	The Ethernet Switch Blade has four switch
				fabric chips: 2 for the Base Interface with 24
				ports, and 2 for the Fabric Interface with 48
				ports. A Switch Fabric failure may result in

Ethernet Switch Blade User's Guide release 3.2.2j page 176