Configuring Evb In Stacking Mode - Lenovo Flex System Fabric CN4093 Application Manual

Configuring EVB in Stacking Mode

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CN4093 Application Guide for N/OS 8.2
This section is applicable only to CN4093 10Gb Converged Scalable Switch.
A stack is a group of up to [eight] CN4093 10Gb Converged Scalable Switch
switches with Lenovo N/OS that work together as a unified system. The switches
in a stack are interconnected by a stack trunk in a local ring topology.
An operational stack must contain one Master and one or more Members, as
follows:
 Master
One switch controls the operation of the stack and is called the Master. The
Master provides a single point to manage the stack. A stack must have one and
only one Master. The firmware image, configuration information, and run‐time
data are maintained by the Master and pushed to each switch in the stack as
necessary.
 Member
Member switches provide additional port capacity to the stack. Members
receive configuration changes, run‐time information, and software updates
from the Master.
 Backup
One member switch can be designated as a Backup to the Master. The Backup
takes over control of the stack if the Master fails. Configuration information and
run‐time data are synchronized with the Master.
For details on implementing the stacking feature, see "Stacking" on page
EVB can be configured on any port in the stack. Use the Master to configure EVB
on a port in the stack. The port numbers in a stack use the following format:
<switch number>:<port number>
Configure VSIDB on a data or management port that resides on the Master.
The Master process the EVB‐related information for all the switch ports in a stack.
The Master performs the VSIDB synchronization (See "VSIDB Synchronization"
on page 312). The Master synchronizes all EVB changes with the Backup.
If the Master fails, the Backup takes over control of the stack. The VSI associations
on the Master ports are lost. All other VSI associations remain unchanged.
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