Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 726

• 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. Sample configuration of C1: • Configure VRRP on L2 links between core routers: C1(config)# interface vlan 100 C1(conf-if-vl-100)# ip address 10.10.100.1/24 C1(conf-if-vl-100)# vrrp-group 10 726 Virtual Link Trunking