In computer networking, the Link Control Protocol (LCP) forms part of the Point-to-Point Protocol (PPP), within the family of Internet protocols. In setting up PPP communications, both the sending and receiving devices send out LCP packetss to determine the standards of the ensuing data transmission.

The protocol:

• checks the identity of the linked device and either accepts or rejects the device

• determines the acceptable packet size for transmission

• searches for errors in configuration

• can terminate the link if requirements exceed the parameters

LCP packets are sent during the Link Establishment Phase of PPP, after the physical layer has been made ready from the Link Dead state. No transmission of network-layer protocols such as IP may be transmitted across PPP until after the Link Establishment or Authentication phases are complete. When a connection is requested by a peer to be terminated (or if Authentication fails), the Link Termination Phase is performed, and PPP returns to the Link Dead state.

Structure

Link Configuration Option

References

External links

• : PPP LCP Extensions

• : The Point-to-Point Protocol (PPP)

• : PPP Reliable Transmission