API Guide

Migrate VMs across data centers with eVLT
OS10 switches support movement of virtual machines (VMs) across data centers using VRRP Active-Active mode.
Configure symmetric VRRP with the same VRRP group ID and virtual IP in VLANs stretched or spanned across data centers.
VMs use the VRRP Virtual IP address of the VLAN as Gateway IP. As the VLAN configurations are symmetric across data
centers, you can move the VMs from one data center to another.
You must assign the same VRRP group IDs to the VLANs in L3 mode, with VRRP in Active-Active mode.
The following figure shows a sample configuration with two data centers:
● Server racks, Rack 1 and Rack 2, are part of data centers DC1 and DC2, respectively.
● Rack 1 is connected to devices A1 and B1 in L2 network segment.
● Rack 2 is connected to devices A2 and B2 in L2 network segment.
● A VLT port channel is present between A1 and B1 as well as A2 and B2.
● A1 and B1 connect to core routers, C1 and D1 with VLT routing enabled.
● A2 and B2 connect to core routers, C2 and D2, with VLT routing enabled.
● The data centers are connected through a direct link or eVLT.
● The core routers C1 and D1 in the local VLT domain connect to the core routers C2 and D2 in the remote VLT domain using
VLT links.
● The core routers C1 and D1 in local VLT domain along with C2 and D2 in the remote VLT domain are part of an L3 cloud.
● The core routers C1, D1, C2, D2 are in a VRRP group with the same vrrp-group ID.
When a virtual machine running in Server Rack 1 migrates to Server Rack 2, L3 packets for that VM are routed without
interruption.
Sample configuration of C1:
1290
Virtual Link Trunking