340 Appendix B Interoperability in a mixed stack configuration
208700-B
You can use 256 port-, protocol-, and MAC SA-bas ed VLANs for th e s tack wit h a
Pure BPS 2000 stack running software version 1.2. (The maximum number
available of MAC SA-based is 48). If you are working with a mixed, or hybrid,
stack, you can use 64 VLANs for the entire stack. When you change from a Pure
BPS 2000 Stack mode to a Hybrid Stack mode:
•If you have up to 64 VLANs on the Pure BPS 2000 Stack, they will be
retained when you change to a Hybrid Stack.
•If you have more than 64 VLANs on the Pure BPS 2000 Stack, you will lose
them all. The Hybrid Stack will return to the def ault VLAN configuration.
Also, a mixed, or hybrid, stack does not support multiple Spanning Tree Groups
(STG). You have a single instance of STG when working with a mixed stack.
Setting up your mixed stack configuration
To set up a mixed stack configuration, follow the basic instructions regarding
Business Policy Switch configuration detailed in Chapters 1 and 2, Installing the
Business Policy Switch 2000, and Installing the BayStack 400-ST1 Cascade
Module.
In the following sections you will find specific information about implementing a
mixed stack configuration:
•“Configuration requirements,” next
•“Automatic failover” on page342
•“Troubleshooting problems” on page345

Configuration requirements

The configuration requirements described here can help you to implement your
mixed stack configuration.