What Happens When You Delete A Controller; What Happens When A Slave Is Added; What Happens When A Slave Is Deleted - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

VSI Master and Slave Redundancy
The BCC also informs the slaves of the new controller through a VSI configuration CommBus message
(the BPX's internal messaging protocol). The message includes a list of controllers attached to the
switch and their corresponding controller IDs. This internal firmware command includes the interface
where the controller is attached. This information, when advertised by the slaves, can be used by the
controllers to set up an inter-master communication channel.
When the first controller is added, the BCC behaves as it did in releases previous to Release 9.2. The
BCC will send a VSI configuration CommBus message to each of the slaves with this controller
information, and it will set up the corresponding control VCs between the controller port and each of
the slaves.
When a new controller is added to drive the same partition, the BCC will send a VSI configuration
CommBus message with the list of all controllers in the switch, and it will set up the corresponding set
of control VCs from the new controller port to each of the slaves.

What Happens When You Delete a Controller

To delete a controller from the switch, use either delshelf or delctrlr.
Use the command delshelf to delete generic VSI controllers.
Use the command delctrlr to delete controllers that have been added to Annex G-capable interfaces.
When one of the controllers is deleted by using the delshelf command, the master-slave connections
associated with this controller will be deleted. The control VCs associated with other controllers
managing the same partition will not be affected.
The deletion of the controller triggers a new VSI configuration (internal) CommBus message. This
message includes the list of the controllers attached to the node. The deleted controller will be removed
from the list. This message will be sent to all active slaves in the shelf. In cluster configurations, the
deletion of a controller will be communicated to the remote slaves by the slave directly attached through
the inter-slave protocol.
While there is at least one controller attached to the node controlling a given partition, the resources in
use on this partition should not be affected by a controller having been deleted. Only when a given
partition is disabled, the slaves will release all the VSI resources used on that partition.
The
confirm the addition of a new VSI shelf with a warning message indicating that the partition is already
used by a different controller.

What Happens When a Slave is Added

When a new slave is activated in the node, the BCC will send a VSI configuration CommBus (internal
BPX protocol) message with the list of the controllers attached to the switch.
The BCC will also set up a master-slave connection from each controller port in the switch to the added
slave.

What Happens When a Slave is Deleted

When a slave is deactivated in the node, the BCC will tear down the master-slave VCs between each of
the controller ports in the shelf and the slave.
Cisco BPX 8600 Series Installation and Configuration
23-22
command allows multiple controllers on the same partition. You will be prompted to
addshelf
Chapter 23 Configuring BXM Virtual Switch Interfaces
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001