Configuring Fhrp Over Vxlan; Overview For Fhrp Over Vxlan; Guidelines And Limitations For Fhrp Over Vxlan - Cisco Nexus 9000 Series Configuration Manual

Configuring VXLAN

Configuring FHRP Over VXLAN

Overview for FHRP Over VXLAN

Overview of FHRP
Starting with Release 7.0(3)I5(1), you can configure First Hop Redundancy Protocol (FHRP) over VXLAN
on Cisco Nexus 9000 Series switches. The FHRP provides a redundant Layer 3 traffic path. It provides fast
failure detection and transparent switching of the traffic flow. The FHRP avoids the use of the routing protocols
on all the devices. It also avoids the traffic loss that is associated with the routing or the discovery protocol
convergence. It provides an election mechanism to determine the next best gateway. Current FHRP supports
HSRPv1, HSRPv2, VRRPv2, and VRRPv3.
FHRP over VXLAN
The FHRP serves at the Layer 3 VXLAN redundant gateway for the hosts in the VXLAN. The Layer 3
VXLAN gateway provides routing between the VXLAN segments and routing between the VXLAN to the
VLAN segments. Layer 3 VXLAN gateway also serves as a gateway for the external connectivity of the hosts.

Guidelines and Limitations for FHRP Over VXLAN

See the following guidelines and limitations for configuring FHRP over VXLAN:
• Configuring FHRP over VXLAN allows the FHRP protocols to peer using the hello packets that are
• When using FHRP with VXLAN, ARP-ETHER TCAM must be carved using the hardware access-list
• Configuring FHRP over VXLAN is supported for both IR and multicast flooding of the FHRP packets.
• The FHRP over VXLAN feature is supported for flood and learn only.
• For Layer 3 VTEPs in BGP EVPN, only anycast GW is supported.
• Beginning with Cisco NX-OS Release 7.0(3)I5(2), configuring FHRP over VXLAN is supported on the
flooded on the VXLAN overlay. The ACLs have been programmed into the Cisco Nexus 9500 Series
switches that allow the HSRP packets that are flooded on the overlay to be punted to the supervisor
module.
tcam region arp-ether 256 CLI command.
The FHRP protocol working does not change for configuring FHRP over VXLAN.
Cisco Nexus 9200, 9300, and 9300-EX Series switches.
Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 7.x
Configuring FHRP Over VXLAN
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