June 2009
Intermediate to advanced
384 pages
8h 20m
English
book
Interconnecting Data Centers Using VPLS (Ensure Business Continuance on Virtualized Networks by Implementing Layer 2 Connectivity Across Layer 3)
by Nash Darukhanawalla - CCIE No. 10332, Patrice Bellagamba
Content preview from Interconnecting Data Centers Using VPLS (Ensure Business Continuance on Virtualized Networks by Implementing Layer 2 Connectivity Across Layer 3)
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Chapter 5. Data Center Interconnect: Architecture Alternatives
This chapter describes design alternatives for removing interdependence of data centers by using spanning-tree isolation techniques.
Data center Layer 2 interconnect solutions that use the Virtual Private LAN Service (VPLS) offer the following key advantages:
• Multisite Layer 2 transport over Layer 3 protected links
• Spanning-tree isolation in the core network that connects remote locations
Several designs exist for data center Layer 2 connectivity because a VPLS device can connect to the aggregation switch in various ways. These designs depend on the following conditions:
• IEEE 802.1Q-in-Q VLAN tag (QinQ) for VLAN scalability
• Monotenant or multitenant data center with local ...
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