Chapter 11. Additional Data Center Interconnect Design Considerations
This chapter addresses several key technologies and issues that you should consider when interconnecting data centers, including the following:
• Multicast
• Alignment of spanning tree, HSRP, and active service modules
• Routing design
• QinQ MAC overlapping
• Storm control
• QoS considerations
• Stateful switchover
• OSPF cost
• Anycast RP and router IDs
Multicast Deployment in a Layer 2 Environment
An Ethernet switch learns MAC addresses from the source MAC address field of the Ethernet frame it receives. This is because a source MAC address of any packet will always be an address of a device and will never be a multicast or a broadcast MAC address. However, a switch, by ...
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