DHCP Relay Agent for Unnumbered Interface Provisioning
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Solution Overview
Problem
Conventional zero/low touch provisioning methods are ineffective for network elements with unnumbered interfaces, as they rely on IP addresses which unnumbered interfaces do not have, making it difficult to automatically configure these elements.
Innovation Solution
The implementation of a DHCP Relay Agent that communicates with a server to obtain configuration information via DHCP packets, using options like 43, 125, or 224-254, allowing unnumbered interfaces to receive device-specific configuration without an IP address, enabling low or zero touch provisioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional DHCP provisioning is used with numbered interfaces, then automatic configuration can be achieved, but IP address space is consumed and manual configuration is required for unnumbered interfaces
Solution Approach 1:
The patent introduces a DHCP Relay Agent as an intermediary component that enables unnumbered interfaces to participate in DHCP provisioning without requiring IP addresses. The relay agent receives DHCP messages from unnumbered interfaces, translates them into appropriate forms, and forwards them to DHCP servers, thereby mediating between the unnumbered interface capability and the numbered-interface-based DHCP protocol
Solution Approach 2:
The patent creates a virtual representation of the unnumbered interface through the DHCP relay agent, which copies and translates the interface's provisioning needs into DHCP-compatible messages. This allows the unnumbered interface to be provisioned indirectly through its virtual counterpart in the DHCP protocol space
2Ease of operation
If unnumbered interfaces borrow IP addresses from other interfaces, then network communication is enabled, but configuration complexity increases
Solution Approach 1:
The patent enables unnumbered interfaces to self-provision by implementing a DHCP client on the unnumbered interface itself. This allows the interface to autonomously request and obtain provisioning information without manual configuration or borrowing IP addresses from other interfaces, thereby simplifying the overall configuration process
3Manufacturing precision
If manual configuration is performed for unnumbered interfaces, then provisioning accuracy is maintained, but turn-up time increases
Solution Approach 1:
The patent implements preliminary provisioning actions by enabling DHCP clients on unnumbered interfaces to automatically obtain configuration information before the network element becomes operational. This preliminary automatic configuration eliminates the need for subsequent manual configuration steps, thereby reducing turn-up time while maintaining provisioning accuracy through standardized DHCP protocols
Data Source
AI summary
A method of low or zero touch provisioning of a network element over an unnumbered interface includes, subsequent to booting up, communicating to a Dynamic Host Configuration Protocol (DHCP) Relay Agent from the unnumbered interface; downloading a configuration through the DHCP Relay Agent over the unnumbered interface; and configuring the network element based on the downloaded configuration. The unnumbered interface can be one of an Ethernet point-to-point interface and an Optical Service Channel (OSC) interface and an overhead channel on optical port, and wherein the unnumbered interface does not have an Internet Protocol (IP) address.