5
Configuring Two Stacks of ISIS Engines
This chapter explains how to configure your ISIS engines into two Management Domains
(stacks); typically when setting up your ISIS environment with more than twelve engines. The
standard ISIS configuration supports up to twelve engines with one or two System Directors.
n
ISIS environments typically are configured with two System Directors for redundancy protection
against data loss. For information on connecting and configuring two System Directors, see
“Configuring the System for Failover” on page 124
The following are the guidelines when planning two stacks of ISIS engines:
•
Maximum number of engines in a stack is twelve engines; therefore all configurations larger
than twelve engines must be configured for two Management Domains (two stacks)
•
Each stack, regardless of the number of engines, is configured into two subnets (in this
chapter, former VLAN 10 and VLAN 20 subnets are now VLAN 100 and VLAN 200 with a
Subnet Mask of 255.255.252.0 to accommodate the possible IP addresses needed for 24
engines)
•
When adding more than twelve engines you increase the amount of shared storage, the file
and client counts are the same regardless of the number of engines and whether you have
one or two stacks
•
An Avid ISIS configuration with two Management Domains can be managed by a single
Avid Interplay configuration
•
Maximum Storage Group size is capped at twelve engines; you cannot increase the size of a
Storage Group that already has twelve engines by adding an engine in a different
Management Domain
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Storage Groups cannot expand across Management Domains.
•
Multiple Storage Groups are supported in each Management Domain, a minimum of two
Storage Groups are required with more than twelve engines (or at least one Storage Group
per stack)
•
Configurations with more than twelve engines or two stacks require generation 2 hardware
(ISS/IXS2000)
•
Configurations with more than twelve engines or two stacks require the SR2500 or AS3000
System Directors. For information on updating your System Directors see