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In order for this configuration to work, the physical loopback ports are required to be in port-channels. There are two types
of physical loopback interfaces: VXLAN Loopback Port and Non-VXLAN Loopback Port. These two port-channels are implicitly
made no spanning tree, so that they do not go into a blocked state if xSTP is enabled.
Internal Loopback
To configure internal loopback port-channels, add free ports in the device as members of a port-channel, say 10, then configure
vxlan-instance 1 loopback. Free ports should be in no shutdown mode.
1. To provision these ports for physical loopback, enter the following command:
Dell(conf-if-po-10)#vxlan-instance 1 [loopback port-channel id]
Where Po-10 is the VXLAN loopback port and Po-20 is the non-VXLAN loopback port.
2. To provision these ports for internal loopback, enter the following command:
Dell(conf-if-po-10)# vxlan-instance 1 loopback
Example for Physical Loopback:
Dell(conf-if-po-10)#vxlan-instance 1 loopback port-channel 20
Example for Internal Loopback:
Dell(conf-if-po-10)#vxlan-instance 1 loopback
VLT Scenario
VXLAN RIOT with physical loopback and internal loopback are supported in a VLT environment.
VXLAN RIOT with Physical Loopback
To enable VXLAN RIOT in a VLT environment, the physical loopbacks are provisioned as VLT port channels with a peering
relationship. The following illustration shows a VLT VXLAN RIOT set up:
In this topology, P2 and P3 in VTEP 1 are VLT port-channels with corresponding VLT peer LAGs being P2 and P3 in VTEP 2.
Similarly, P6 and P7 in VTEP 3 are VLT port-channels with corresponding VLT peer LAGs being P6 and P7 in VTEP 4.
NOTE: P2, P3, P6, and P7 can be a single port or multi-port port-channels that are VLT port-channels.
NOTE: The VLT VXLAN configuration for RIOT deviates from the standard VLT behavior when these physical loopbacks are
provisioned as VLT port-channels.
VXLAN RIOT with Internal Loopback
To facilitate it’s working in a VLT environment, the loopback port channel should be provisioned as VLT port channels with a
peering relationship. For instance, in the topology below , P2 in VTEP 1 should be a VLT port-channel with it’s corresponding
vlt-peer-lag being P2 on VTEP 2, and similarly P6, etc., :
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Virtual Extensible LAN (VXLAN)