Licensing Requirements For Enhanced Vpc; Configuring Enhanced Vpcs; Cisco Nexus 5000 Series Nx-Os Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1 - Cisco nexus 5000 series Configuration Manual

Licensing Requirements for Enhanced vPC

• Failure of the vPC Peer Link
• Failure of the vPC Peer-Keepalive Link
Licensing Requirements for Enhanced vPC
The following table shows the licensing requirements for this feature:
Product
Cisco NX-OS

Configuring Enhanced vPCs

Overview of Configuration Steps for Enhanced vPC
An enhanced vPC configuration consists of a combination of two standard vPC configurations: the dual homed
connection of a host to two FEXs and the dual homed connection of a FEX to two switches. The required
configuration tasks are listed here, but the detailed procedures for those two standard configurations are
presented in the "Configuring Virtual Port Channels" chapter of this document.
To configure enhanced vPC, perform the following steps. Unless noted otherwise, the procedures for each
step are given in

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When both uplinks from one FEX fails, the FEX shuts down its host ports, and the traffic flow from all
dual homed hosts is moved to the other FEX.
When the vPC secondary switch detects the failure of the peer link, it checks the status of the primary
switch by the peer-keepalive link. If the primary switch is unresponsive, the secondary switch maintains
all traffic flows as before. If the primary switch is active, the secondary switch shuts down its interfaces
to the FEXs, and the traffic flow from all dual homed FEXs is moved to the primary switch. Ethernet
traffic from the hosts is unaffected in either case.
If the secondary switch carries FCoE traffic and shuts down its interfaces to the FEXs, it also shuts down
all virtual Fibre Channel (vFC) interfaces that are bound to the FEX host ports. In this case, the hosts
must use multipathing to move SAN traffic to the remaining vFC interface.
A failure of the vPC peer-keepalive link by itself does not affect the traffic flow.
License Requirement
This feature does not require a license. Any feature not included in a license
package is bundled with the Cisco NX-OS system images and is provided at no
extra charge to you. For a complete explanation of the Cisco NX-OS licensing
scheme, see the Cisco NX-OS Licensing Guide.
Configuring Virtual Port Channels, on page
Configuring Enhanced Virtual Port Channels
101.
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