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RFC · NetworkingStandard explained

RFC 2131: DHCP: Automatic IPv4 configuration

Summary

RFC 2131 describes DHCP for dynamic addresses and other network parameters from centrally managed pools. Automation simplifies operations and makes the DHCP service critical for network access. Leases connect identity, time and address management.

Ideas

  • Clients discover servers by broadcast.
  • Leases limit how long an address is bound.
  • Options deliver gateway, DNS and other parameters.

Facts

  • RFC 2131 replaces RFC 1541.

Remarks

  • RFC 2131 has the status “Draft Standard”; current errata and successor documents should also be checked.

Recommendations

  • Run redundant DHCP services with coordinated ranges.
  • Protect access networks against unauthorised DHCP servers.

References

Read the RFC at the RFC Editor

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