Administrator Guide
• 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 a Layer 2 network segment.
• Rack 2 is connected to devices A2 and B2 in a Layer 2 network segment.
• A VLT link aggregation group (LAG) is present between A1 and B1 as well as A2 and B2.
• A1 and B1 are connected to core routers, C1 and D1 with VLT routing enabled.
• A2 and B2 are connected to core routers, C2 and D2, with VLT routing enabled.
• The core routers C1 and D1 in the local VLT domain are connected 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 a Layer 3 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 through the default
gateway.
The following examples show sample configurations of the core routers.
NOTE:
The following configuration assumes that all VLT-related settings are already present on the respective devices.
Sample configuration of C1:
vlt domain 10
peer-link port-channel 128
back-up destination 10.16.140.6
system-mac mac-address 00:00:aa:00:00:00
unit-id 0
peer-routing
1022
Virtual Router Redundancy Protocol (VRRP)