Configuring Esi Arp Suppression; Overview Of Esi Arp Suppression - Cisco Nexus 9000 Series Configuration Manual

Configuring ESI ARP Suppression

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ESI: 03aa.aaaa.aaaa.aa00.0001,
Parent interface: port-channel2,
ES State: Up
Port-channel state: Up
NVE Interface: nve1
NVE State: Up
Host Learning Mode: control-plane
Active Vlans: 3001-3002
DF Vlans: 3002
Active VNIs: 30001-30002
CC failed VLANs: 0-3000,3003-4095
CC timer status: 10 seconds left
Number of ES
My ordinal: 0
DF timer start time: 00:00:00
Config State: config-applied
DF List: 201.1.1.1 202.1.1.1
ES route added to L2RIB: True
EAD routes added to L2RIB: True
See the following Syslog output:
switch(config)# 2017 Jan ?7 19:44:35 Switch %ETHPORT-3-IF_ERROR_VLANS_SUSPENDED: VLANs
2999-3000 on Interface port-channel40 are being suspended.
(Reason: SUCCESS)
After Fixing configuration
2017 Jan ?7 19:50:55 Switch %ETHPORT-3-IF_ERROR_VLANS_REMOVED: VLANs 2999-3000 on Interface
port-channel40 are removed from suspended state.
Configuring ESI ARP Suppression

Overview of ESI ARP Suppression

ESI ARP suppression is an extension of already available ARP suppression solution in VXLAN-EVPN. This
feature is supported on top of ESI multihoming solution, that is on top of VXLAN-EVPN solution. ARP
suppression is an optimization on top of BGP-EVPN multihoming solution. ARP broadcast is one of the most
significant part of broadcast traffic in data centers. ARP suppression significantly cuts down on ARP broadcast
in the data center.
ARP request from host is normally flooded in the VLAN. You can optimize flooding by maintaining an ARP
cache locally on the access switch. ARP cache is maintained by the ARP module. ARP cache is populated by
snooping all the ARP packets from the access or server side. Initial ARP requests are broadcasted to all the
sites. Subsequent ARP requests are suppressed at the first hop leaf and they are answered locally. In this way,
the ARP traffic across overlay can be significantly reduced.
ARP suppression is only supported with BGP-EVPN (distributed gateway).
ESI ARP suppression is a per-VNI (L2-VNI) feature. ESI ARP suppression is supported in both L2 (no SVI)
and L3 modes. Beginning with Cisco NX-OS Release 7.0(3)I5(2), only L3 mode is supported.
The ESI ARP suppression cache is built by:
• Snooping all ARP packets and populating ARP cache with the source IP and MAC bindings from the
• Learning IP-host or MAC-address information through BGP EVPN MAC-IP route advertisement.
Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 7.x
126
members: 2
request.
Configuring VXLAN EVPN Multihoming