https://community.extremenetworks.com/t5/extremeswitching-exos-switch/when-would-you-not-want-to-enable-gratuitous-arp-protection/m-p/62917#M17963 We have a collapsed core, with two x-460's using VRRP and MLAG for redundancy. All edge switches are trunked to these redundantly. We have several VLAN's, including one for VOIP. Wouldn't it make sense to turn on gratuitous arp protection for our VLAN's? In what case/situation would you *not* want to enable this protection? Thu, 28 Feb 2019 06:46:43 GMT Bruce_Garlock 2019-02-28T06:46:43Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/when-would-you-not-want-to-enable-gratuitous-arp-protection/m-p/62917#M17963 We have a collapsed core, with two x-460's using VRRP and MLAG for redundancy. All edge switches are trunked to these redundantly. We have several VLAN's, including one for VOIP. Wouldn't it make sense to turn on gratuitous arp protection for our VLAN's? In what case/situation would you *not* want to enable this protection? Thu, 28 Feb 2019 06:46:43 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/when-would-you-not-want-to-enable-gratuitous-arp-protection/m-p/62917#M17963 Bruce_Garlock 2019-02-28T06:46:43Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/when-would-you-not-want-to-enable-gratuitous-arp-protection/m-p/62918#M17964 You should validate before enable gratuitous ARP protection for Servers, Routers, Firewall etc. especially if they use some kind of HA mechanism.<BR /> <BR /> In VLANs where only clients reside it's mostly a a good idea to enable it to prevent spoofing.<BR /> <BR /> Regards<BR /> Christoph Tue, 16 Apr 2019 20:20:18 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/when-would-you-not-want-to-enable-gratuitous-arp-protection/m-p/62918#M17964 Christoph 2019-04-16T20:20:18Z