UCS storage physical connectivity has a slightly different design consideration as compared to LAN physical connectivity.
The following are some design considerations for SAN connectivity:
- Northbound storage physical connectivity does not support vPCs like LAN connectivity, where you can have cross-connected vPCs for redundancy.
- Depending on the storage type, port channeling or trunking is possible to combine multiple storage uplink ports that provide physical link redundancy.
- Redundancy of storage resources is handled by the storage itself and varies from vendor to vendor including active-active, active-passive, Asymmetric Logical Unit Assignment (ALUA), and vendor specific implantations such as EMC PowerPath.
- Storage can be connected through northbound Cisco Nexus, MDS or third-party fabric switches. This is the recommended configuration for better scalability and performance...