Dell MX9116n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 630
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.
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• 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 LAG 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 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 through the default gateway. 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 C1(conf-vlan100-vrid-10)# priority 250 C1(conf-vlan100-vrid-10)# virtual-address 10.10.100.5 • Configure VLT port channel for VLAN 100: C1(config)# interface port-channel 10 C1(conf-if-po-10)# vlt-port-channel 10 C1(conf-if-po-10)# switchport mode trunk C1(conf-if-po-10)# switchport trunk allowed vlan 100 C1(conf-if-po-10)# exit • Add members to port channel 10: C1(config)# interface ethernet 1/1/3 C1(conf-if-eth1/1/3)# channel-group 10 C1(conf-if-eth1/1/3)# exit C1(config)# interface ethernet 1/1/4 C1(conf-if-eth1/1/4)# channel-group 10 C1(conf-if-eth1/1/4)# exit • Configure OSPF on L3 side of core router: C1(config)# router ospf 100 C1(conf-router-ospf-100)# exit C1(config)# interface vlan 200 C1(conf-if-vl-200)# ip ospf 100 area 0.0.0.0 • Configure VLT port channel for VLAN 200: C1(config)# interface port-channel 20 C1(conf-if-po-20)# vlt-port-channel 20 C1(conf-if-po-20)# switchport mode trunk C1(conf-if-po-20)# switchport trunk allowed vlan 200 C1(conf-if-po-20)# exit • Add members to port channel 20: C1(config)# interface ethernet 1/1/5 C1(conf-if-eth1/1/5)# channel-group 20 C1(conf-if-eth1/1/5)# exit C1(config)# interface ethernet 1/1/6 C1(conf-if-eth1/1/6)# channel-group 20 C1(conf-if-eth1/1/6)# exit Sample configuration of D1: • Configure VRRP on L2 links between core routers: D1(config)# interface vlan 100 D1(conf-if-vl-100)# ip address 10.10.100.2/24 D1(conf-if-vl-100)# vrrp-group 10 D1(conf-vlan100-vrid-10)# virtual-address 10.10.100.5 630 Virtual link trunking
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