INTERNET PROTOCOL CONTROL PROTOCOL

In computer networking, 'Internet Protocol Control Protocol' ('IPCP') is a network control protocol for establishing and configuring Internet Protocol over a Point-to-Point Protocol link. IPCP uses the same packet exchange mechanism as the Link Control Protocol. IPCP packets may not be exchanged until PPP has reached the Network-Layer Protocol phase, and any IPCP packets received before this phase is reached should be silently discarded.

Contents

IPCP Frame

References

IPCP Frame

Code	ID	Length	IPCP Information
1 byte	1 byte	2 bytes	variable

IPCP packet encapsulated in a PPP frame

Flag	Address	Control	8021(hex)	Payload (and padding)	FCS	flag

The information contained in an IPCP packet is such:

★ Configure-request

★ Configure-ack

★ Configure-nak

★ Configure-reject

★ Terminate-request

★ Terminate-ack

★ Code-reject
After the configuration is done, the link is capable to carry IP data as a payload of the PPP frame. The protocol field value is 0021(hex). This code indicates that IP data is being carried.

References

★ RFC 1332