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This chapter includes the following sections:
Cisco UCS uses SAN pin groups to pin Fibre Channel traffic from a vHBA on a server to an uplink Fibre Channel port on the fabric interconnect. You can use this pinning to manage the distribution of traffic from the servers.
To configure pinning for a server, you must include the SAN pin group in a vHBA policy. The vHBA policy is then included in the service profile assigned to that server. All traffic from the vHBA will travel through the I/O module to the specified uplink Fibre Channel port.
You can assign the same pin group to multiple vHBA policies. As a result, you do not need to manually pin the traffic for each vHBA.
Changing the target interface for an existing SAN pin group disrupts traffic for all vHBAs which use that pin group. The fabric interconnect performs a log in and log out for the Fibre Channel protocols to re-pin the traffic.
In a system with two fabric interconnects, you can associate the pin group with only one fabric interconnect or with both fabric interconnects.
Include the pin group in a vHBA template.