Configuring HDLC

High-level Data Link Control (HDLC) is a bit-oriented link layer protocol. HDLC can transmit any types of bit stream transparently.

HDLC supports only point-to-point link and does not support point-to-multipoint link.

HDLC supports neither IP address negotiation nor authentication. It uses keepalives to check link status.

HDLC works only on synchronous interfaces. HDLC is supported by serial interfaces that operate in synchronous mode and POS interfaces.