Cisco Nexus 5500 Series Configuration Manual page 25

Overview
Ethernet TOR Switch Topology
In this example, the blade server rack incorporates blade switches that support 10-Gigabit Ethernet uplinks
to the Cisco Nexus device. The blade switches do not support FCoE, so there is no FCoE traffic and no Fibre
Channel ports on the Cisco Nexus device.
In the example configuration, the Cisco Nexus device has Ethernet uplinks to two Catalyst switches. If STP
is enabled in the data center LAN, the links to one of the switches will be STP active and the links to the other
switch will be STP blocked.
Figure 2: Ethernet TOR Switch Topology
All of the server-side ports on the Cisco Nexus device are running standard Ethernet. FCoE is not required,
so the server ports are connected using 10-Gigabit Ethernet NICs.
The servers are connected to the data center SAN through MDS 9134 SAN switches. The server Fibre Channel
ports require standard Fibre Channel HBAs.
Cisco Nexus 5500 Series NX-OS Fundamentals Configuration Guide, Release 7.x
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