IBM SC30-3681-08 Hdlc cable cable type, Hdlc clocking external or internal, Hdlc idle ¯agor mark

	Con®guring PPP Interfaces (Talk 6)
STAC-LZS
	The STAC-LZS algorithm as described in RFC 1974
MPPC The Microsoft Point-to-Point Compression algorithm as described in
	RFC 2118.
Example:
set ccp protocols
Enter a prioritized list of enabled compressors
(first is preferred), all on one single line.
Choices (can be abbreviated) are:
Stac-LZS, MPPC
Compressor list [Stac-LZS:]?
hdlc cable cable type
Set the HDLC cable type (that is connected to the interface) to one of the
following types:
RS-232 DTE
RS-232 DCE
V35	DTE
V35	DCE
V36	DTE
X21	DTE
X21	DCE

Example: set hdlc cable rs-232 dce

A DTE cable is used when you are attaching the router to some type of

DCE device (for example, a modem or a DSU/CSU).

A DCE cable is used when the router is acting as the DCE and providing the clocking for direct attachment.

hdlc clocking external or internal

To connect to a modem or DSU, con®gure clocking as external. To connect directly to another DTE device, use a DCE cable and set the clocking to ªinternalº at one end and to ªexternalº at the other.

For internal clocking, you are prompted to enter a line speed in the range 2400 to 2048000, if you have not already set the line speed.

Example: set hdlc clocking internal

hdlc encoding NRZ or NRZI

Sets the HDLC transmission encoding scheme for an interface. Encoding may be set for NRZ (non-return to zero) or NRZI (non-return to zero inverted). NRZ is the more widely used encoding scheme while NRZI is used in some IBM con®gurations. The default value is NRZ.

Example: set hdlc encoding nrz

hdlc idle ¯agor mark

Sets the data link idle state to either Flag or Mark.

The ¯ag option provides continuous ¯ags (7E hex) between frames.

The mark option puts the line in a marking state (OFF, 1) between frames.

Example: set hdlc idle flag

Chapter 33. Con®guring and Monitoring Point-to-Point Protocol Interfaces 477