Users Guide

Table Of Contents
Internet Group Management Protocol (IGMP) and Protocol-Independent Multicast (PIM) are not supported on a virtual-
network interface.
IP routing of incoming VXLAN encapsulated traffic in the overlay after VXLAN termination is not supported.
The following tables show how to use anycast gateway IP and MAC addresses in a data center with three virtual networks and
multiple VTEPs:
Globally configure an anycast MAC address for all VTEPs in all virtual networks. For example, if you use three VTEP switches
in three virtual networks:
Table 75. MAC address for all VTEPs
Virtual network VTEP Anycast gateway MAC address
VNID 11 VTEP 1
VTEP 2
VTEP 3
00.11.22.33.44.55
00.11.22.33.44.55
00.11.22.33.44.55
VNID 12 VTEP 1
VTEP 2
VTEP 3
00.11.22.33.44.55
00.11.22.33.44.55
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 76. 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
VXLAN
881