# Expected IP VS Actual IP

**URL:** <https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [August 8, 2023, 9:54pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590 "2023-08-08T21:54:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Brittany\_Villasenor](https://avatars.discourse-cdn.com/v4/letter/b/e68b1a/32.png) [@Brittany\_Villasenor](https://forum.inductiveautomation.com/u/Brittany_Villasenor)\
**Post date:** [August 8, 2023, 9:54pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590/1 "2023-08-08T21:54:44Z")

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I have a saw selector where the operators do just that... select a saw they are working on. I'm trying to find a way to use the actual IP and the one that is expected for that HMI screen to stop an operator from selecting the wrong saw on their screen. I have the tags ready for the actualIP and the ExpectedIP but don't know what the next step would be. What are some good ways to do this?

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**Author:** ![ryan.white](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ryan.white/32/73193_2.png) [@ryan.white](https://forum.inductiveautomation.com/u/ryan.white)\
**Post date:** [August 8, 2023, 9:57pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590/2 "2023-08-08T21:57:01Z")

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> [@Mobile Client MAC Address](https://forum.inductiveautomation.com/t/mobile-client-mac-address/23037/9):
>
> In answer to both questions, the answers are to be found in the following abbreviations: A.R.P. and R.A.R.P. This is to say, that routers and such use Address Resolution Protocol and Reverse Address Resolution Protocol to query a given I.P. Address or MAC address if given the other one. Because you are frequently dealing with situations like D.H.C.P. ( Dynamic Host ) where the IP address changes according to what address just happens to be unused in a pool, you could obtain a list of possible MA…

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [August 8, 2023, 9:57pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590/3 "2023-08-08T21:57:40Z")

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Just need to use a script transform to create the dropdown list to show only the valid saws (or disable the invalid saws)