Internet Protocol Control Protocol

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.

IP Frame

IP packet encapsulated in a PPP frame

The information contained in an IPCP packet is such:
*Configure-request
*Configure-ack
*Configure-nak
*Configure-reject
*Terminate-request
*Terminate-ack
*Code-rejectAfter the configuration is done, the link is able 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


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