API Guide
Virtual network VTEP Anycast gateway MAC address
VTEP 3 00.11.22.33.44.55
VNID 13
VTEP 1
VTEP 2
VTEP 3
00.11.22.33.44.55
00.11.22.33.44.55
00.11.22.33.44.55
• Configure a unique IP address on the virtual-network interface on each VTEP across all virtual networks. Configure the same anycast
gateway IP address on all VTEPs in a virtual-network subnet. For example:
Table 2. IP address on the virtual-network interface on each VTEP
Virtual network VTEP Virtual-network IP address Anycast gateway IP address
VNID 11 VTEP 1
VTEP 2
VTEP 3
10.10.1.201
10.10.1.202
10.10.1.203
10.10.1.254
10.10.1.254
10.10.1.254
VNID 12 VTEP 1
VTEP 2
VTEP 3
10.20.1.201
10.20.1.202
10.20.1.203
10.20.1.254
10.20.1.254
10.20.1.254
VNID 13 VTEP 1
VTEP 2
VTEP 3
10.30.1.201
10.30.1.202
10.30.1.203
10.30.1.254
10.30.1.254
10.30.1.254
Advertise VXLAN source IP address
1. Advertise the IP address of the local source tunnel interface to all VTEPs in the underlay IP network using the existing routing
infrastructure. This example uses OSPF to advertise the VXLAN source IP address on Ethernet1/1/3, which is the underlay network-
facing interface:
OS10(config)# router ospf 100
OS10(config-ospf)# router-id 110.111.170.195
OS10(config-ospf)# exit
OS10(config)# interface ethernet1/1/3
OS10(config-if-eth1/1/3)# ip ospf 100 area 0.0.0.0
OS10(config-if-eth1/1/3)# exit
OS10(config)# interface loopback 1
OS10(config-if-lo-1)# ip ospf 100 area 0.0.0.0
Each VTEP switch in the underlay IP network learns the IP address of the VXLAN source interface. If a remote VTEP switch is not
reachable, its status displays as DOWN in the show nve remote-vtep output.
2. Configure the MTU value on L3 underlay network-facing interfaces in Interface mode to be at least 50 bytes higher than the MTU on
the server-facing links to allow for VXLAN encapsulation. The range is from 1312 to 9216.
mtu value
3. Return to CONFIGURATION mode.
exit
Configure VLT
(Optional) To use VXLAN in a VLT domain, configure the VLT domain — including the VLT Interconnect (VLTi) interfaces, backup
heartbeat, and VLT MAC address — as described in the OS10 Enterprise Edition User Guide in the Virtual link trunking section.
Required VLT VXLAN configuration:
• The IP address of the VTEP source Loopback interface must be same on the VLT peers.
VXLAN
13