Vxlan Licensing Information - Cisco Nexus 7000 Series Configuration Manual

Configuring VXLAN Flood and Learn
Since there is a centralized Layer 3 gateway, any multicast packet that needs to be routed across multiple
VNIs, will be have to be replicated multiple times (one for each VNI).
In the above example, if P12 is interested in traffic initiated by VM31, the Layer 3 gateway will have to send
two copies of the packet (one for VNI 20.20, and, one for VNI 30.30).
Also, note that routing between VNI and Layer 3 interfaces can be supported only for those interfaces that
are local to the Layer 3 gateway, assuming those local Layer 3 interfaces are configured in the same tenant
VRF as the VNI. One possible solution would be to have a separate Layer 3 connection between those leaf
switches and spine (Layer 3 gateway) switch, configure them all in tenant VRF, run OSPF (or IS-IS) for that
tenant VRF, and run PIM to draw multicast traffic along the tree.

VXLAN Licensing Information

The following table lists the license package for VXLAN Flood and Learn:
Feature License
Enterprise Services Package
LAN_ENTERPRISE_SERVICES_PKG
Guidelines and Limitations for VXLAN
VXLAN has the following guidelines and limitations:
• VxLAN and Fabric Path features cannot be enabled on the same VDC.
• 4 VTEP interfaces per VDC are supported. The total number of remote VTEPs is 1K per VDC.
• 1K VNIs are allowed per VDC.
• 1k BDIs are allowed per system.
• Bidir in underlay is not supported on vPC VXLAN Gateways.
• In VXLAN vPC deployments with F3 modules, the vPC peer-link should be on an isolated ASIC instance
• In a VXLAN vPC deployment with F3 modules and connected FEX devices, unknown unicast traffic from
• In a VXLAN vPC deployment with F3 modules, known unicast traffic from a remote source to the vPC
• The number of IPv4 unicast routes supported is 64K shared with multicast routes.
• Number of IPv4 Multicast Groups is 32K due to software limitation.
• Maximum number of MAC addresses learned (local MACs and remote MACs) is 64K per F3 ASIC.
from the Layer 3 core ports. After changing the peer-link ports to an isolated ASIC instance, ensure that
you reload the switch.
a remote source to the vPC switch pair may result in duplicate traffic if the MAC address is known to
the vPC switches. Both vPC switches will receive a copy of the packet and forward it to the receiver
behind FEX.
switch pair may result in loss of traffic if the MAC address is no longer known to the vPC switches.
(F3 MAC table size is 64K).
Product ID
N7K-LAN1K9
N77-LAN1K9
Cisco Nexus 7000 Series NX-OS VXLAN Configuration Guide
VXLAN Licensing Information
17