Deployment Guide

22 Dell EMC Networking Virtualization Overlay with BGP EVPN
Leaf1a
Leaf1b
exit
exit
Note: The remaining leaf switches are configured in the same manner.
6.2 VLT configuration
1. Give the two interfaces used in the VLTi a description and remove them from Layer 2 mode with the
no switchport command.
2. Create the VLT domain. Use the same value on both peers.
3. Add the backup destination address. This is the management IP address of the VLT peer switch.
4. Set the VLT delay restore timer to 120. Dell EMC recommends increasing the restore timer in an
EVPN configuration from its default value, 90, to allow for BGP EVPN adjacency to be established
and for the remote MAC and neighbor entries to be downloaded by EVPN.
5. Add the interfaces participating in VLTi with the discovery-interface command.
6. Specify a VLT MAC address. Use the same value on both peers.
VLT configuration
Leaf1a
Leaf1b
interface range ethernet 1/1/55-1/1/56
description VLTi
no switchport
vlt-domain 127
backup destination 100.67.166.220
delay-restore 120
discovery-interface ethernet 1/1/55
discovery-interface ethernet 1/1/56
vlt-mac 00:00:01:02:03:01
interface range ethernet 1/1/55-1/1/56
description VLTi
no switchport
vlt-domain 127
backup destination 100.67.166.219
delay-restore 120
discovery-interface ethernet 1/1/55
discovery-interface ethernet 1/1/56
vlt-mac 00:00:01:02:03:01
Note: The remaining leaf switches are configured in the same manner. Dell EMC recommends using at least
two high-bandwidth ports for the VLTi. Port numbers used will vary depending on switch model.
6.3 Virtual network configuration
1. Create interface loopback0 and give it a description and IP address. This will be used for the VTEP.
Use the same IP address on both leafs.
2. Create interface loopback1 and give it a description and IP address. This will be the router ID used for
the BGP adjacency carrying the EVPN overlay routes. Use a unique IP address on each leaf.
3. Create a Network Virtualization Edge (NVE) instance with the nve command and specify loopback0
as the designated VTEP source interface.
4. Enable the EVPN control plane with the evpn command. For each VNI:
a. Create an EVPN instance (EVI).
b. Map a VNI to the EVI. The BGP EVPN protocol groups MAC addresses and ARP/neighbor
addresses under EVIs to exchange them between VTEPs. In OS10, each EVI is associated with
a VNI in a 1:1 mapping.
c. Configure a Route Distinguisher (RD) using the format 4-octet-ipv4addr:2-octet-number.
This example uses the format vtep-ip-address:evi.