Allied Telesis X600-48TS/XP, x600-48Ts, x600-24Ts/XP, x600-24Ts-POE manual Common Stack Configuration

x600 Series Layer 3 Gigabit Ethernet Switches Installation Guide

Note

The ability to independently set both a stack member’s priority and its ID means that the stack master does not need to have an ID of 1; although configuration is simplified by arranging for ID 1 to be the device with the lowest priority value - and thereby forcing it to be the stack master. If you create a stack using new switches, the following (simplified) process should ensure that the master member has an ID of 1.

New switches are shipped with a Stack Member-ID of 1 and a priority of 128. If four such switches are created as a stack, the switch with the lowest MAC address will be selected to be the stack master (because all priority settings are 128). The remaining three stack member devices will then reboot and automatically be assigned IDs values of between 2 and 4. The stack master does not reboot and retains its Stack Member-ID of 1.

You can change the Stack Member-ID by using the STACK RENUMBER command.

Common Stack Configuration

Once the switches have configured themselves into a VCS stack, they all share the same configuration information and startup scripts.

Stack Management VLAN

Managing the stack is the same as managing an individual switch. You can connect to the asynchronous console port of any stack member, or you can set an IP address on a network VLAN (for example, VLAN1) and use SSH or Telnet for remote access.

As the switches form themselves into a stack, each switch creates a common stack management VLAN and a management IP address. Both the VLAN ID and the IP address are internal entities that are used between the stacked switches, via the AT-StackXG interfaces, and therefore do not appear on the user network.

Initially the stack assigns the default VLAN tag ID of 4094 to the management VLAN, and assigns an IP address from the subnet 192.168.255.0 / 28 to this VLAN as the management IP address. Once the stack has formed, you can change both these settings. To change the VLAN ID use the STACK MANAGEMENT VLAN command. To change the management IP address use the STACK MANAGEMENT SUBNET command. Note however, that you must keep the 28 bit subnet mask, (/28 or 255.255.255.240). Also note that because the stack’s internal address mapping tables will register the management VLAN ID and the management IP address, these must be unique across the stack’s internal and external network. To view the current settings for the stack

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