Meraki

Possum · ‎Jan 25 2023

Hi,

Has anyone successfully disabled Netbios on Windows using DHCP option 43? We have successfully implemented this on Palo Alto DHCP servers but not yet applied it to our MX's.

Working config on Palo:

Proposed config on MX's:

Is this the correct format for hex entry?

cmr · ‎Jan 25 2023

On the MS you'd need to add the colons for each byte so it would be 01:04:00:00:00:02 If it doesn't work as above, try that.

If my answer solves your problem please click Accept as Solution so others can benefit from it.

View solution in original post

KarstenI · ‎Jan 25 2023

As this is just an option in DHCP, I don't see any reason it shouldn't work.

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alemabrahao · ‎Jan 25 2023

Yes, It's correct.

I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

Please, if this post was useful, leave your kudos and mark it as solved.

cmr · ‎Jan 25 2023

On the MS you'd need to add the colons for each byte so it would be 01:04:00:00:00:02 If it doesn't work as above, try that.

If my answer solves your problem please click Accept as Solution so others can benefit from it.

MarcW · ‎Jun 18 2024

Was the suggested solution of 43 and the hex entry successful?

Possum · ‎Jun 18 2024

It does appear to have worked. I included colons in the hex value and it's set as below:

Running ipconfig /all on a Windows workstation reports "NetBIOS over Tcpip" as disabled.

 NetBIOS over Tcpip. . . . . . . . : Disabled

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Disable Netbios with DHCP Option 43

Disable Netbios with DHCP Option 43