Cisco Nexus 5000 Series Switch CLI Software Configuration Guide (OL-16597-01, July 2009)

topology that is shown in the following figure provides the vPC functionality to dual homed servers with
1-Gigabit Ethernet uplink interfaces.
Figure 16: Single Homed Fabric Extender vPC Topology
The Cisco Nexus 5000 Series switch can support up to 12 configured single homed Fabric Extenders (576
ports) with this topology however only 480 dual homed host servers can be configured in a vPCs with this
configuration.
The current generation of Cisco Nexus 2000 Series Fabric Extender does not support EtherChannels on
its host interfaces. Therefore a maximum of two links can be configured in an EtherChannel from the
server where each link is connected to a separate Fabric Extender.
Note
Dual Homed Fabric Extender vPC Topology
You can connect the Cisco Nexus 2000 Series Fabric Extender to two upstream Cisco Nexus 5000 Series
switches and downstream to a number of single homed servers. The topology shown in the following figure
provides the vPC functionality to singly connected servers with 1-Gigabit Ethernet uplink interfaces.
Figure 17: Dual Homed Fabric Extender vPC Topology
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01 127
Information About vPCs
Dual Homed Fabric Extender vPC Topology