Connectivity Guide

VXLAN is a type of encapsulation used as an NVO solution. VXLAN encapsulates a tenant payload into IP UDP packets for transport across
the IP underlay network. In OS10, each virtual network is assigned a 24-bit number that is called a VXLAN network identier (VNI) that the
VXLAN-encapsulated packet carries. The VNI uniquely identies the tenant segment on all VTEPs. OS10 sets up ASIC tables to:
• Enables creation of a L2 bridge ooding domain across a L3 network.
• Facilitates packet forwarding between local ports and tunneling packets from the local device to a remote device.
Congure VXLAN
To extend a L2 tenant segment using VXLAN, follow these conguration steps on each VTEP switch:
1 Congure the source IP address used in encapsulated VXLAN packets.
2 Congure a virtual network and assign a VXLAN VNI.
3 Congure VLAN-tagged access ports.
4 Congure untagged access ports.
5 (Optional) Enable routing for hosts on dierent virtual networks.
6 Advertise the local VXLAN source IP address to remote VTEPs.
7 (Optional) Congure VLT.
Congure source IP address on VTEP
When you congure a switch as a VXLAN tunnel endpoint (VTEP), congure a Loopback interface, whose IP address is used as the source
IP address in encapsulated packet headers. Only a Loopback interface assigned to a network virtualization edge (NVE) instance is used as
a source VXLAN interface.
• Do not recongure the VXLAN source interface or the IP address assigned to the source interface if there is at least one VXLAN
network ID (VNI) already assigned to a virtual-network ID (VNID) on the switch.
• The source Loopback IP address must be reachable from a remote VTEP.
• An IPv6 address is not supported as the source VXLAN address.
• Do not assign the source Loopback interface to a non-default VRF instance.
• Underlay reachability of remote tunnel endpoints is supported only in the default VRF.
1 Congure a Loopback interface to serve as the source VXLAN tunnel endpoint in CONFIGURATION mode. The range is from 0 to
255.
interface loopback number
2 Congure an IP address on the Loopback interface in INTERFACE mode. The IP address allows the source VTEP to send VXLAN
frames over the L3 transport network.
ip address ip-address/mask
3 Return to CONFIGURATION mode.
exit
4 Enter NVE mode from CONFIGURATION mode. NVE mode allows you to congure the VXLAN tunnel endpoint on the switch.
nve
5 Congure the Loopback interface as the source tunnel endpoint for all virtual networks on the switch in NVE mode.
source-interface loopback number
6 Return to CONFIGURATION mode.
exit
VXLAN
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