Active or Passive ARP relates to the learning of ARP addresses. With ARP a client requests the MAC address for a specific IP. With passive ARP learning, a network device can use such a ARP request or an ARP reply to learn the IP address for a specific MAC address. You can't practically make a network work without Active ARP, so not sure what your customer is not allowing. Static ARP would be an option, but that is highly unusual as you would need to program each network device with a list of MAC addresses for each IP. This really is not practical, and it would make profiling quite impossible and Client Insight (Central with gateways) would be an option to get profiling information from the normal network traffic. You may best work with your Aruba partner on the options you have.
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Herman Robers
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If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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Original Message:
Sent: May 18, 2023 04:23 AM
From: matchabear
Subject: ARP with SPAN
Hi All,
I am still looking for alternative from DHCP method to profile an endpoint.
From the attached, I see there are two kinds of ARP, one is active, one is passive.
Since the customer does not allow active ones, what needs to be done to achieve passive ARP ? Is there any example of output out there as well ?
Thanks.