Brocade offers a proprietary solution called Logical SANs, or LSANs. This feature allows traffic between devices that would otherwise be isolated in separate SANs. This implementation makes sense for Brocade’s small-to- medium sized business customers, who typically have a significant investment in smaller, legacy switches deployed in workgroup SANs.
LSANs allow customers to:
• Make efficient use of high-cost tape devices • Derive value from legacy SAN equipment and configurations • Retain the reliability and security of separate SANs • Maintain separate address spaces and scalability of individual SANs
LSAN implementation requires purchase of at least one proprietary multi- protocol router. The diagram shows a redundant configuration, which requires two of the special-purpose routers.