RFC 3927, which is based on Gratuitous ARP, specifies00:00:00:00:00:00for the target MAC. However many simple TCP/IP stacks have an API which permits the specification of only one MAC value, and when the Ethernet Destination field is set to 'broadcast', the ARP target is also set 'b...
Gratuitous ARP is a specialARP (Address Resolution Protocol)reply that is not a response to anARP request. A Gratuitous ARP reply is a reply to without a ARP request. No reply is expected for a Gratuitous ARP . A Gratuitous ARP packet has the following characteristics. The source and destin...
> This causes the R6K to update the ARP/bridge table. > > The RFC states that, > > When a VRRP router restarts or boots, it SHOULD NOT send any ARP > messages using its physical MAC address for the IPv4 address it owns; > it should only send ARP messages that include virtual MAC ...
ARP request packet though, it uses the MAC address of the hardware interface. RFC 5798 does not say anything about which source MAC address (hardware vs virtual) should be used on a gratuitous ARP request. The only mention I found related to ARP source MAC addresses is in section 8.1.2 (...
ip arp gratuitous To enable the gratuitous Address Resolution Protocol (ARP) control on the router, use the ip arp gratuitous command in global configuration mode. To disable the ARP control, use the no form of this command. ip arp gratuitous { local | none | ignore } no ip arp ...