Cannot set /128 IPv6 address to an interface #8244

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opened 2025-12-29 20:34:16 +01:00 by adam · 3 comments
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Originally created by @BrunoBlanes on GitHub (Jun 24, 2023).

NetBox version

v3.5.3

Python version

3.8

Steps to Reproduce

  1. Create a device with a virtual interface
  2. Create a prefix pool and a 128 mask length IPv6 address
  3. Try and add said address to the virtual interface.

Expected Behavior

Expected to be able to set the address as primary loopback address of a device.

Observed Behavior

fd9b:58:30ac::1/128 is a broadcast address, which may not be assigned to an interface.

Originally created by @BrunoBlanes on GitHub (Jun 24, 2023). ### NetBox version v3.5.3 ### Python version 3.8 ### Steps to Reproduce 1. Create a device with a virtual interface 2. Create a prefix pool and a `128` mask length IPv6 address 3. Try and add said address to the virtual interface. ### Expected Behavior Expected to be able to set the address as primary loopback address of a device. ### Observed Behavior `fd9b:58:30ac::1/128 is a broadcast address, which may not be assigned to an interface.`
adam added the type: bugstatus: duplicate labels 2025-12-29 20:34:16 +01:00
adam closed this issue 2025-12-29 20:34:16 +01:00
Author
Owner

@zombah commented on GitHub (Jun 24, 2023):

It looks like this is already fixed in 3.5.4

@zombah commented on GitHub (Jun 24, 2023): It looks like this is already fixed in 3.5.4
Author
Owner

@BrunoBlanes commented on GitHub (Jun 26, 2023):

Will update today and let you know if it solves my issue.

@BrunoBlanes commented on GitHub (Jun 26, 2023): Will update today and let you know if it solves my issue.
Author
Owner

@BrunoBlanes commented on GitHub (Jun 26, 2023):

Yep, looks legit fixed, thanks @zombah.

@BrunoBlanes commented on GitHub (Jun 26, 2023): Yep, looks legit fixed, thanks @zombah.
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Reference: starred/netbox#8244