Differences In Stack Unit Replacement - Arris Ruckus ICX 7850 Series Configuration Manual

Fastiron stacking configuration

Table of Contents

Changes to Stacking in FastIron Release 08.0.90

Stack interactive-setup

NOTE

If a discovered standalone unit is password protected, stack interactive-setup prompts you to enter the

password. Stack interactive-setup checks for enable super-user password and ignores all other passwords.

Ruckus recommends that you make all physical connections and run stack interactive-setup on the active controller of a stack

or on a standalone unit that will become the active controller.

In a two-unit stack, you can choose a ring or a chain that forms a linear-topology trunk in either of the following cases:

•

The configuration of the active controller is a linear-topology trunk. For example, an ICX 7250 has stack-trunk 1/2/1 to

1/2/4 or stack-trunk 1/2/5 to 1/2/8 configuration.

•

All linear-topology trunk ports have physical connections.

Refer to

Support for two-unit stack linear-topology trunks

For example, if you connect all four ports 1/2/5 through 1/2/8 to ports 1/2/5 through 1/2/8 on another unit, stack interactive-

setup displays an option to choose a ring of two trunks (stack-trunk 1/2/5 to 1/2/6 and stack-trunk 1/2/7 to 1/2/8), or a linear-

topology trunk (stack-trunk 1/2/5 to 1/2/8). The default is to form a ring.

The following restrictions apply to connections for both stack interactive-setup and stack zero-touch provisioning:

•

The connection cannot be out of sequential order in a stacking trunk. Suppose, for example an ICX 7750 has the

connection stack-trunk 1/2/1 to 1/2/3 that links to stack-trunk 2/2/4 to 2/2/6 on stack unit 2. Port 1/2/1 must link to

2/2/4, port 1/2/2 must link to 2/2/5, and so on.

•

The primary port must be connected. For example, link 1/2/2 to 2/2/5 without link 1/2/1 to 2/2/4 is not valid. The system

displays an error message and aborts.

The system performs numerous checks to confirm that the discovered topology is supported. If the system detects any error, it

displays a message and aborts the operation.

The stack interactive-setup utility includes the following behaviors to improve the configuration process:

•

The utility sends out probes to discover new units and connections as soon as it is enabled.

•

The system changes configuration to suit the discovered topology. For example, if ICX 7750 stacking ports are configured

on module 2 and another unit is discovered through ports on module 3, the system changes the ICX 7750 stacking port

or stacking trunk configuration to module 3.

•

The system tries to consider the current configuration when assigning stacking ports. For example, if the system

discovers that ports 1/2/1 and 1/2/2 link to a new unit and the current configuration is stack-port 1/2/1, it enlarges the

configuration to include port 1/2/2 and changes it to stack-trunk 1/2/1 to 1/2/2. If the current configuration is stack-trunk

1/2/1 to 1/2/3, the system keeps the super set.

•

The stack-trunk is contiguous. If ports 1/2/1 and 1/2/3 link to another unit, the system generates stack-trunk 1/2/1 to

1/2/3, even if 1/2/2 has no link.

•

After successfully converting standalone units to stack members, the priority of the unit running the stack interactive-

setup utility is raised to 128.

If stack interactive-setup detects new links between existing units and discovers new units, the utility handles only the new links.

Then stack interactive-setup requests that you run the utility again to discover new units.

For more information, refer to