Dell EMC SmartFabric OS10 User Guide Release 10.5.0

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:

• 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(config-router-ospf-100)# redistribute connected
  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
  

• Configure VLT port channel for VLAN 100:

  D1(config)# interface port-channel 10
  D1(conf-if-po-10)# vlt-port-channel 10
  D1(conf-if-po-10)# switchport mode trunk
  D1(conf-if-po-10)# switchport trunk allowed vlan 100 
  D1(conf-if-po-10)# exit

• Add members to port channel 10:

  D1(config)# interface ethernet 1/1/3
  D1(conf-if-eth1/1/3)# channel-group 10
  D1(conf-if-eth1/1/3)# exit
  D1(config)# interface ethernet 1/1/4
  D1(conf-if-eth1/1/4)# channel-group 10
  D1(conf-if-eth1/1/4)# exit
  

• Configure OSPF on L3 side of core router:

  D1(config)# router ospf 100
  D1(config-router-ospf-100)# redistribute connected
  D1(conf-router-ospf-100)# exit
  D1(config)# interface vlan 200
  D1(conf-if-vl-200)# ip ospf 100 area 0.0.0.0

• Configure VLT port channel for VLAN 200:

  D1(config)# interface port-channel 20
  D1(conf-if-po-20)# vlt-port-channel 20
  D1(conf-if-po-20)# switchport mode trunk
  D1(conf-if-po-20)# switchport trunk allowed vlan 200 
  D1(conf-if-po-20)# exit

• Add members to port channel 20:

  D1(config)# interface ethernet 1/1/5
  D1(conf-if-eth1/1/5)# channel-group 20
  D1(conf-if-eth1/1/5)# exit
  D1(config)# interface ethernet 1/1/6
  D1(conf-if-eth1/1/6)# channel-group 20
  D1(conf-if-eth1/1/6)# exit

Sample configuration of C2:

• Configure VRRP on L2 links between core routers:

  C2(config)# interface vlan 100
  C2(conf-if-vl-100)# ip address 10.10.100.3/24
  C2(conf-if-vl-100)# vrrp-group 10
  C2(conf-vlan100-vrid-10)# virtual-address 10.10.100.5
  

• Configure VLT port channel for VLAN 100:

  C2(config)# interface port-channel 10
  C2(conf-if-po-10)# vlt-port-channel 10
  C2(conf-if-po-10)# switchport mode trunk
  C2(conf-if-po-10)# switchport trunk allowed vlan 100 
  C2(conf-if-po-10)# exit

• Add members to port channel 10:

  C2(config)# interface ethernet 1/1/3
  C2(conf-if-eth1/1/3)# channel-group 10
  C2(conf-if-eth1/1/3)# exit
  C2(config)# interface ethernet 1/1/4
  C2(conf-if-eth1/1/4)# channel-group 10
  C2(conf-if-eth1/1/4)# exit
  

• Configure OSPF on L3 side of core router:

  C2(config)# router ospf 100
  C2(config-router-ospf-100)# redistribute connected
  C2(conf-router-ospf-100)# exit
  C2(config)# interface vlan 200
  C2(conf-if-vl-200)# ip ospf 100 area 0.0.0.0

• Configure VLT port channel for VLAN 200:

  C2(config)# interface port-channel 20
  C2(conf-if-po-20)# vlt-port-channel 20
  C2(conf-if-po-20)# switchport mode trunk
  C2(conf-if-po-20)# switchport trunk allowed vlan 200 
  C2(conf-if-po-20)# exit

• Add members to port channel 20:

  C2(config)# interface ethernet 1/1/5
  C2(conf-if-eth1/1/5)# channel-group 20
  C2(conf-if-eth1/1/5)# exit
  C2(config)# interface ethernet 1/1/6
  C2(conf-if-eth1/1/6)# channel-group 20
  C2(conf-if-eth1/1/6)# exit

Sample configuration of D2:

• Configure VRRP on L2 links between core routers:

  D2(config)# interface vlan 100
  D2(conf-if-vl-100)# ip address 10.10.100.4/24
  D2(conf-if-vl-100)# vrrp-group 10
  D2(conf-vlan100-vrid-10)# virtual-address 10.10.100.5
  

• Configure VLT port channel for VLAN 100:

  D2(config)# interface port-channel 10
  D2(conf-if-po-10)# vlt-port-channel 10
  D2(conf-if-po-10)# switchport mode trunk
  D2(conf-if-po-10)# switchport trunk allowed vlan 100 
  D2(conf-if-po-10)# exit

• Add members to port channel 10:

  D2(config)# interface ethernet 1/1/3
  D2(conf-if-eth1/1/3)# channel-group 10
  D2(conf-if-eth1/1/3)# exit
  D2(config)# interface ethernet 1/1/4
  D2(conf-if-eth1/1/4)# channel-group 10
  D2(conf-if-eth1/1/4)# exit
  

• Configure OSPF on L3 side of core router:

  D2(config)# router ospf 100
  D2(config-router-ospf-100)# redistribute connected
  D2(conf-router-ospf-100)# exit
  D2(config)# interface vlan 200
  D2(conf-if-vl-200)# ip ospf 100 area 0.0.0.0

• Configure VLT port channel for VLAN 200:

  D2(config)# interface port-channel 20
  D2(conf-if-po-20)# vlt-port-channel 20
  D2(conf-if-po-20)# switchport mode trunk
  D2(conf-if-po-20)# switchport trunk allowed vlan 200 
  D2(conf-if-po-20)# exit

• Add members to port channel 20:

  D2(config)# interface ethernet 1/1/5
  D2(conf-if-eth1/1/5)# channel-group 20
  D2(conf-if-eth1/1/5)# exit
  D2(config)# interface ethernet 1/1/6
  D2(conf-if-eth1/1/6)# channel-group 20
  D2(conf-if-eth1/1/6)# exit