Cisco® CCNP Switch Exam Cram Notes : Describing Chassis Virtualization And Aggregation Technologies

1. Layer2 Technologies

1.7 Describe chassis virtualization and aggregation technologies

1.7.a Stackwise:

In Cisco StackWise technology, individual switches intelligently join to create a single switching unit. Configuration and routing information is shared by every switch in the stack, creating a single logical switching unit.

Switches can be added to and deleted from a working stack without affecting performance. All stack members have full access to the stack interconnect bandwidth.

The stack is managed as a single unit by a master switch, which is elected from one of the stack member switches.

The following are the important features of Cisco StackWise technology:

1. Each switch in the stack has the capability to behave as a master or subordinate (member) in the hierarchy.

2. When the StackWise switches are properly connected and operational, they form a bi-directional ring where data flow is bidirectional.

3. Each stack of Switches has a single IP address and is managed as a single object.

4. Each stack has only one configuration file, which is distributed to each member in the stack.

5. A working stack can accept new members or delete old ones without service interruption.

6. Each switch in the stack can serve as a master, creating a 1:N availability scheme for network control

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