Nortel 2000, Using Manual

Page: 340 / 405

340 Appendix B Interoperability in a mixed stack configuration
208700-B
You can use 256 port-, protocol-, and MAC SA-based VLANs for the stack with 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 default 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 page 342
• “Troubleshooting problems” on page 345
Configuration requirements
The configuration requirements described here can help you to implement your
mixed stack configuration.