gratuitous arp reply

[zafar_118]

Hi,

Why would a device sending gratuitous arp requests will also send the

gratuitous arp replies? What my understanding is that both will basically update the other hosts arp caches...so if request does it why need to send the reply?

Thanks

[Rolf Fischer]

Hi,

I found this very interesting discussion at the Security Expert Study Group:

https://learningnetwork.cisco.com/thread/16335

Suprisingly the replies are used much more than requests.

Best regards

Rolf