Single fiber channel failure and recovery on Fabric Interconnects

In virtualized environments, SAN connectivity is very crucial for hypervisors as a shared SAN is a critical component for advanced virtualization features, such as migrating and then running virtual machines between different hosts. A problem with the connectivity of the SAN array can also cause issues with the SAN boot.

SAN could be connected to Fabric Interconnects directly or through a northbound Nexus, MDS, or third-party switch. Proper connectivity between Fabric Interconnects and SAN storage processors or Fabric Interconnects and SAN fabric switches is necessary. SAN connectivity is also configured as redundant. However, unlike Ethernet, where a northbound vPC that is using a cross switch connection can protect against a complete switch failure, the connectivity between SAN switches and Fabric Interconnects can only be a straight connection. It is, however, possible to create a Fiber Channel port channel for protection...