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Virtual Port Channel Migration - Migration of Nodes from a First-Generation Switch to a Second-Generation Switch
Virtual Port Channel Migration - Migration of Nodes from a
First-Generation Switch to a Second-Generation Switch
Initially the fabric is configured with vPCs between two first-generation switches. Traffic flows are designed
so that only these vPCs are used for data traffic. Now that you want to migrate both of the first-generation
switches to second-generation switches, the following steps are required.
For this procedure, vPC primary and vPC secondary are first generation switches in vPC pair, sending traffic
as described above.
To determine which transceivers, adapters, and cables that this switch supports, see
http://www.cisco.com/c/en/us/support/interfaces-modules/transceiver-modules/products-device-support-tables-list.html.
To see the transceiver specifications and installation information, see
http://www.cisco.com/c/en/us/support/interfaces-modules/transceiver-modules/products-installation-guides-list.html.
Before you begin
You have two first-generation Cisco Nexus 9000 Series switches comprising a virtual port channel (vPC).
You are migrating to two second-generation Cisco Nexus 9000 Series switches using the same cables.
First-generation Cisco Nexus 9000 Series switches include those switches that do not contain an EX or an
FX in the PID (product identification).
Second-generation Cisco Nexus 9000 Series switches include those switches that have an EX or an FX in the
PID.
Move any APIC controllers that are connected to the migrating vPC first-generation switches to any other
switches in the fabric and wait for the APIC cluster to become "Fully Fit".
Step 1
From the APIC GUI, perform the Remove From Controller operation for vPC secondary. The switch is clean rebooted
by the APIC. Wait for about 10 minutes for this operation to finish. This action prompts all traffic to use the other
first-generation switch for data traffic. Disconnect the cabling from vPC secondary.
Step 2
Uninstall the first-generation switch by reversing the order of the steps in the Installing the Switch Chassis section, of
the switch specific Hardware Installation Guide.
Step 3
Install the second-generation switch by following the steps in the Installing the Switch Chassis section, of the switch
specific Hardware Installation Guide.
Step 4
Connect the loose cabling that you removed from the first-generation switch, to the same ports on the second-generation
switch.
Step 5
Now you register the new second-generation switch with the APIC. Register the new node with the same node name
and node ID. This switch becomes part of the fabric. Policies are pushed to the new switch and the vPC legs are kept
down since there is a mismatch of generation switches. At this point, vPC primary continues to send the data traffic.
Step 6
From the APIC GUI, perform the Remove From Controller operation for vPC primary. This switch is clean rebooted
by the APIC.
Wait for about 10 minutes for this operation to finish. The vPC leg on the second-generation switch, which was kept
down earlier comes up. This action prompts all traffic to move to the new second-generation switch. Please note the
vPC ports on the new second-generation switch will come up in about 10 to 22 seconds when STP is disabled for the
deployed VLANs on the remote devices, and there will be traffic drops in the range of 10 to 40 seconds, depending
upon the flows in the fabric. When STP is enabled on the VLANs on the remote devices, the traffic loss will be in the
range of 40 to 75 seconds, depending upon the flows in the fabric.
Cisco Nexus 93128TX ACI-Mode Switch Hardware Installation Guide
34
Connecting the Switch to the ACI Fabric
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