CHAPTER 24

Configuring SAN Pin Groups
Thischapter includes the followingsections:
SANPin Groups, page 343
Creatinga SAN Pin Group, page 343
Deletinga SAN Pin Group, page 344

SAN Pin Groups

CiscoUCS uses SAN pin groups to pin Fibre Channel traffic from a vHBA on a server to an uplink Fibre
Channelport on the fabric interconnect. You can use this pinning to manage the distribution of traffic from
theservers.
InFibre Channel switch mode, SAN pin groups are irrelevant. Any existing SAN pin groups will be
ignored.
Note
Toconfigure pinning for a server, you must include the SAN pin group in a vHBA policy. The vHBA policy
isthen included in the service profile assigned to that server. All traffic from the vHBA will travel through
theI/O module to the specified uplink Fibre Channel port.
Youcan assign the same pin group to multiple vHBA policies. As a result, you do not need to manually pin
thetraffic for each vHBA.
Changingthe target interface for an existing SAN pin group disrupts traffic for all vHBAs which use that
pingroup. The fabric interconnect performs a log in and log out for the Fibre Channel protocols to re-pin
thetraffic.
Important

Creating a SAN Pin Group

Ina systemwith two fabric interconnects,you can associatethe pin group withonly one fabric interconnect
orwith both fabric interconnects.
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