Znyx Networks bh5700 manual Stack Creation, Stack Port Association

semicolon-delimited statements. Each statement specifies an action to take on a stack. A stack is a group of ports on a single switch fabric chip. Actions include stack creation, stack port association, stack configuration and stack control.

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Stack Creation

The first step in creating a stack is to define its location. Each stack is assigned a unique small integer by the user. On the Ethernet Switch Blade this integer must be a value from 0 to 31. The location is defined with two values; a Physical Point of Attachment (ppa) and a network location. The ppa is defined by the keyword "ppa" followed by an integer value. The integer value is a 0 based contiguous value representing the physical switch fabric chip as it was discovered by the Linux operating system. In the case of the Ethernet Switch Blade there are two chips directly controlled. The network location specifies an IP address of the CPU that controls the physical switch fabric chips. If the CPU that is running zstack controls the physical switch fabric chip, the key word "local" is used in place of the IP address. Currently only "local" CPU control is supported.

Stack creation example for a Ethernet Switch Blade:

stack0: ppa0 local;

stack1: ppa1 local;

The above statements indicate that there are two switch fabric chips that are controlled by the local CPU.

Stack Port Association

After stack creation, the physical ports must be associated with a virtual port name. One might think of this as mapping the ports from their physical association to a virtual name. The physical port numbers are usually 0 based, but are dependent on how the ports are physically configured in the switch fabric silicon and how those ports are labeled at the physical connector. At a minimum the port association is used to move the ports of a second, third, or more switch silicon chip to a different virtual port name then the others. In this way, the ports can be built into a unique linear port list.

Stack port association syntax:

stack<N>: <zre_list> = <zre_list>;

The port association statement begins with the stack and number representing the group of ports being mapped. The stack must be previously created with a stack creation command. After the semicolon are two zre_lists separated by an equal sign. The first is the list of virtual port names, the second is the physical port names. The assignment is done in order, and there must be

Ethernet Switch Blade User's Guide release 3.2.2j page 254