Installing A New Cisco Nexus 2000 Series Fabric Extender; Vpc Failure Recovery; Vpc Member Port Failure - Cisco Nexus 5000 Series Operation Manual

vPC Failure Recovery

S e n d d o c u m e n t a t i o n c o m m e n t s t o n 5 k d o c f e e d b a c k @ c i s c o . c o m

Installing a New Cisco Nexus 2000 Series Fabric Extender

With pre-provisioning, you can fully configure the new Fabric Extender before the Fabric Extender is
connected to a Cisco Nexus 5000 Series switch.
To install a new Cisco Nexus 2000 Series Fabric Extender, follow these steps:
Step 1
Pre-provision the slot with the Fabric Extender model.
Step 2
Configure the interfaces as though the Fabric Extender is connected.
Step 3
Connect the Fabric Extender and wait for it to come online.
Step 4
Verify that all configurations are applied correctly
Note
The switch applies all configurations serially in a best-effort fashion when the Fabric Extender comes
online.
vPC Failure Recovery
This section describes different vPC failure scenarios and how to recover from them. This section
includes the following topics:
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vPC Member Port Failure

Figure 1-1
failure on one of the port-channel members, it redistributes the affected flows to the remaining port
channel members. The return flow from MAC_C to MAC_A could take the path of the left- or the
right-side Cisco Nexus 5000 Series switch, depending on the port-channel hash algorithm of the top
switch. For those flows that traverse the right-side Cisco Nexus 5000 Series switch (the red line), the
Cisco Nexus 5000 Series switch passes the traffic to the left-side Cisco Nexus 5000 Series switch,
because it no longer has the local connection to host MAC_A. This is one of the scenarios where a vPC
peer link is used to carry data traffic.
We recommend that you provision enough bandwidth for peer links to accommodate the bandwidth
needed for link failure scenarios.
Cisco Nexus 5000 Series NX-OS Interfaces Operations Guide, Release 5.0(3)N2(1)
1-14
vPC Member Port Failure, page 1-14
vPC Peer Link Failure, page 1-15
vPC Peer Keepalive Link Failure, page 1-16
vPC Peer Switch Failure, page 1-17
vPC Peer Link Failure Followed by a Peer Keepalive Link Failure, page 1-17
vPC Keepalive Link Failure Followed by a Peer Link Failure, page 1-17
shows the traffic flow when one vPC member port fails. Once the host MAC_A detects a link
Chapter 1 Virtual Port Channel Operations