AHA! Learned several new things by asking the question!
I used cjoseph's command on several APs and they are all using ADP. I have a fairly simple, not-large, controller-based network running 8.3, and found this explanation
Enable Controller Discovery (arubanetworks.com) and if I'm following, then everyone-uses-ADP is exactly what we want and expect.
Looking at the flowchart, it looks like DHCP discovery is tried before ADP (and ADP before DNS). In our case, we've got the old Option 43 setup pointing to the old aruba-master that was at 10.10.31.201. And 10.10.31.201 is long gone. Given that the DHCP comes before ADP in the fail-through, I'm thinking that the ONLY things that could come out of that old DHCP Option 43 setting are all BAD things!
I think that means that we should go replace the old obsolete aruba DHCP Option 43 settings with our VOIP phone magic string just to get the old setting out of there, right?
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Cathy Fasano
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Original Message:
Sent: Jan 13, 2022 05:26 PM
From: Dustin Burns
Subject: Can I be sure that my aruba-master option 43 is no longer used?
Yes this is a great validation method to check how your APs have been getting their controller address :)
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Dustin Burns
Lead Mobility Engineer @WEI
ACCX 1271| ACMX 509| ACSP | ACDA | MVP Guru 2021
If my post was useful accept solution and/or give kudos
Original Message:
Sent: Jan 13, 2022 05:21 PM
From: Colin Joseph
Subject: Can I be sure that my aruba-master option 43 is no longer used?
Chose any APs in the affected subnets and run the command below to see how they discover their controllers.
(Babarella2) *#show ap consolidated-provision info ap-name <name of ap>ap name: Centra-335ipv4 address type: dynamicipv4 address: 192.168.1.199ipv4 netmask: 255.255.255.0ipv4 gateway: 192.168.1.1ipv4 lease: 86400ipv4 dhcp server: 192.168.1.1ipv4 dns server: 192.168.1.1, 0.0.0.0master preference: IPv4Protocol in Use: IPv4(CONFIG)master: 192.168.1.7master discover type: ADP <-------------------previous lms: 0.0.0.0lms addrs [0]: 192.168.1.233
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Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
Original Message:
Sent: Jan 13, 2022 04:41 PM
From: Cathy Fasano
Subject: Can I be sure that my aruba-master option 43 is no longer used?
We are trying to set up a DHCP option 43 to boot VOIP phones, and when we got into the configuration we found that it was already set with a value. Unlike the VOIP phone setting, which is a complex string of keys and values separated by semicolons, the setting is simply an IP address.
According to some (old) documentation, the IP address in question -- 10.10.31.201 -- is the old value of "aruba-master". Now according to our DNS server, the current value of aruba-master is 10.10.31.209. And 10.10.31.201 is shut down and doesn't answer pings.
I think that this means that we used to do the magical APs-figure-themselves-out via Option 43 (in connection with Option 60 maybe?) but we have long since migrated to using DNS and aruba-master is not at that old IP specified in the old Option 43.
Can we safely conclude that Option 43 is not in use by anything on the aruba side of things and can we take over Option 43 and use it for the VOIP phone magical string? Or have I missed something that I should check?
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Cathy Fasano
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