Network Type
Thenetwork type is only relevant to traffic on uplink ports, because FCoE does not exist outside Cisco UCS.
Therest of the data center network only differentiates between LAN and SAN traffic. Therefore, you do not
needto take the network type into consideration when you estimate oversubscription of a fabric interconnect
port.
Pinning
Pinningin Cisco UCS is only relevant to uplink ports. You can pin Ethernet or FCoE traffic from a given
serverto a specific uplink Ethernet port or uplink FC port.
Whenyou pin theNIC and HBA ofboth physicaland virtual servers to uplink ports, you give the fabric
interconnectgreater control over the unified fabric. This control ensures more optimal utilization of uplink
portbandwidth.
CiscoUCS uses pin groups to manage which NICs, vNICs, HBAs, and vHBAs are pinned to an uplink port.
Toconfigure pinning for a server, you can either assign a pin group directly, or include a pin group in a vNIC
policy,and then add that vNIC policy to the service profile assigned to that server. All traffic from the vNIC
orvHBA onthe server travels through the I/O module to the same uplink port.

Pinning Server Traffic to Server Ports

Allserver traffic travels through the I/O module to server ports on the fabric interconnect. The number of
linksfor which the chassisis configured determines how this traffic is pinned.
Thepinning determines which server traffic goes to which server port on the fabric interconnect. This pinning
isfixed. You cannot modify it. As a result, you must consider the server location when you determine the
appropriateallocation of bandwidthfor a chassis.
Youmust review the allocation of ports to links before you allocate servers to slots. The cabled ports are
notnecessarily port 1 and port 2 on the I/O module. If you change the number of links between the fabric
interconnectand the I/O module, you must reacknowledge the chassis to have the traffic rerouted.
Note
Allport numbers refer to the fabric interconnect-side ports on the I/O module.
Chassis with One I/O Module (Not Configured for Fabric Port Channels)
Ifthe adapterin a serversupports and isconfigured for adapterport channels, those portchannels are
pinnedto the same link as described in the following table. If the I/O module in the chassis supports and
isconfigured for fabric port channels, the server slots are pinned to a fabric port channel rather than to an
individuallink.
Note
Link 8Link 7Link 6Link 5Link 4Link 3Link 2Link 1 /
Fabric
Port
Channel
Links on
Chassis
NoneNoneNoneNoneNoneNoneNoneAll server
slots
1link
Cisco UCS Manager GUI Configuration Guide, Release 2.0
OL-25712-04 35
Traffic Management