Vixel 335 manual Mode Description, Cascade Information

Vixel Model 335 Installation & Configuration Guide CHAPTER 3 Management

To modify the port cascade settings:

1. Click Change Port Cascade Settings. The Cascade Information page appears.

Figure 3-18.Cascade Information Page

2.On this page, you can view the port settings, highlight a specific zone, or change the port cascade mode.

3.Select the port to modify by clicking the Cascade Mode drop-down box for the specific port.

4.Select the port cascade mode, which configures the port’s operation in the switch. The different port cascade modes are:

Mode	Description
auto	This setting automatically configures the connection type based on
	information sent by other InSpeed switches. The default setting is
	Auto for InSpeed-based managed switches.
none	The port is disabled.
tree	A port that allows arbitration fairness to other cascaded InSpeed-
	based switches or ports connected to end devices. If the port is a tree
	port then the ARB (Arbitrate) is sent down the port and, when the
	ARB is received back at the ASIC, a connection is made between the
	source and destination ports. All ports are viewed as 100% FC_AL
	compliant.
string	A specially pre-allocated port designed to maintain fairness when
	two or more InSpeed-based storage switches are serially cascaded.
	When the destination port is a string and an OPN is received on the
	ASIC, an ARB is transmitted throughout the total string cascade
	loop to alert all devices to enforce the Loop fairness rules. Therefore,
	if two devices try to ARB for the loop at the same time, the higher
	Priority AL_PA will win the cascade first, the lower priority one will
	follow.
	Note: There must be two string ports on a zone. The port is
	configured for a pair of string ports to other switches.

Each Port can operate independently of the other ports except in String mode.

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