TLDR: Misconfigured IPv4 settings can lead to network inefficiencies, security vulnerabilities, and connectivity issues. Problems such as incorrect subnet masking, duplicate IP addresses, or improper DHCP configurations can disrupt communication and compromise the reliability of network operations. These issues undermine the foundational goals of IPv4, introduced in 1981, to facilitate robust and efficient networking.

https://en.wikipedia.org/wiki/IPv4

One major issue with misconfigured IPv4 is improper subnetting. Using incorrect subnet masks can lead to overlapping subnets or unintended traffic routing, resulting in reduced network performance and potential data leaks. Similarly, assigning duplicate IP addresses in static configurations or mismanaging DHCP pools can create address conflicts, causing devices to lose connectivity or experience intermittent outages.

https://datatracker.ietf.org/doc/html/rfc791

To mitigate risks associated with IPv4 misconfiguration, network administrators must implement structured IP address management practices, validate subnet designs, and use automated tools to detect configuration errors. Tools like SolarWinds IP Address Manager or Infoblox can help manage large-scale IPv4 deployments efficiently. Regular audits, adherence to best practices, and staff training on IPv4 management ensure a secure and stable network environment.

https://docs.solarwinds.com/en/Success_Center/IPAM/Content/IPAM.htm