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Topic: HDLC

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	Cisco HDLC Configuration Tasks
		Select Cisco HDLC as the encapsulation method for the interface.
		Use to specify Cisco HDLC as the encapsulation method for the interface.
		Use to enable loopback detection on a Cisco HDLC interface.
	www.juniper.net /techpubs/software/erx/junose52/swconfig-link/html/cisco-hdlc-config4.html (475 words)

	HDLC - A Technical Overview
		Other benefits of HDLC are that the control information is always in the same position, and specific bit patterns used for control differ dramatically from those in representing data, which reduces the chance of errors.
		Within a network using HDLC as it's data link protocol, if a configuration is used in which there is a primary station, it is used as the controlling station on the link.
		HDLC uses the term "frame" to indicate an entity of data(or a protocol data unit) transmitted from one station to another.
	members.tripod.com /~vkalra/hdlc.html (2500 words)

	HDLC Protocol Description
		HDLC protocol resides with Layer 2 of the OSI model, the data link layer.
		HDLC uses zero insertion/deletion process [bit stuffing] to ensure that the bit pattern of the delimiter flag does not occur in the fields between flags.
		The HDLC frame is synchronous and therefore relies on the physical layer to provide method of clocking and synchronizing the transmission and reception of frames.
	www.interfacebus.com /Design_HDLC.html (868 words)

	X.25 - LAPB \| MLP \| HDLC \| Terminology
		HDLC is used on multipoint lines and it can support as many as 256 terminal control units or secondary stations per line.
		HDLC has 3 modes of operation according to the strength of the master/slave relationship.
		HDLC supports an extended window size (modulo 128) where the number of possible outstanding frames for acknowledgement is raised from 8 to 128.
	www.protocols.com /pbook/x25.htm (3377 words)

	Sangoma - HDLC
		The job of the HDLC layer is to ensure that data passed up to the next layer has been received exactly as transmitted (i.e error free, without loss and in the correct order).
		HDLC NRM (also known as SDLC), on the other hand, has a permanent primary station with one or more secondary stations.
		HDLC LAPB is the Link Layer (Level 2 of the OSI model) that is usually used by X.25, the ITU (previously called the CCITT) standard for Packet Switched Networks.
	www.sangoma.com /main/support/tutorials/hdlc (477 words)

	HDLC: High Level Data Link Control
		The High Level Data Link Control (HDLC) protocol, an ISO data link layer protocol based on the IBM SDLC, is to ensure that data passed up to the next layer has been received exactly as transmitted (i.e error free, without loss and in the correct order).
		Another important function of HDLC is flow control, which ensures that data is transmitted only as fast as the receiver can receive it.
		HDLC LAPB is a very efficient protocol, which requires a minimum of overhead to ensure flow control, error detection and recovery.
	www.javvin.com /protocolHDLC.html (464 words)

	Cisco - ISDN DDR Using HDLC Encapsulation
		This method is known as Dynamic Multiple Encapsulations and is discussed in ISDN DDR using HDLC Encapsulation with Dynamic Multiple Encapsulations.
		The reason why a user requires HDLC on the ISDN is not obvious, since it has a lot of disadvantages compared to PPP.
		HDLC does not support any kind of authentication, hence the best protection here would be to verify the calling number with the isdn caller command on your interface.
	www.cisco.com /warp/public/793/access_dial/bri_ddr_hdlcencap.html (2342 words)

	Ethereal: RE: [Ethereal-users] RE: Analyzing Cisco HDLC
		It sounds like your trace may be PPP rather than Cisco HDLC.
		The fix may be as simple as changing the link type of your capture file.
		> > If all you'll be using libpcap for is to write out a > Cisco HDLC capture, > and you won't be using libpcap to read the packets from > the device, you > don't have to modify libpcap.
	www.ethereal.com /lists/ethereal-users/200409/msg00140.html (822 words)

	HDLC Modes of Operation
		The HDLC protocol is a general purpose data link control protocol capable of supporting a range of modes of operation.
		The control field of HDLC follows the address field and is the second part of all HDLC frames.
		This describes the format of the HDLC control word according to the order in which the bits are transmitted at the physical layer.
	www.erg.abdn.ac.uk /users/gorry/course/dl-pages/hdlc-mode.html (245 words)

	High Level Data Link Control (HDLC) Protocol
		The HDLC protocol is a general purpose protocol which operates at the data link layer of the OSI reference model.
		Each piece of data is encapsulated in an HDLC frame by adding a trailer and a header.
		The frames are separated by HDLC flag sequences which are transmitted between each frame and whenever there is no data to be transmitted.
	www.erg.abdn.ac.uk /users/gorry/course/dl-pages/hdlc.html (156 words)

	HDLC Single Channel Controller
		The Xilinx HDLC LogiCORE™ IP allows a designer to tailor the HDLC to suit their application by setting certain parameters to enable/disable features.
		HDLC exists in layer 2 of the OSI model which is the data link layer.
		HDLC uses zero insertion/deletion process (commonly known as bit stuffing) to ensure that the bit pattern of the delimiter flag does not occur in the fields between flags.
	www.xilinx.com /ipcenter/hdlc/hdlc.htm (327 words)

	RFC 1549 (rfc1549) - PPP in HDLC Framing
		PPP uses HDLC as a basis for the framing.
		It is assumed that the reader is already familiar with HDLC, or has access to a copy of [2] or [6].
		Octet-synchronous HDLC This section summarizes the use of HDLC with octet-synchronous links, such as SONET and optionally ISDN B or H channels.
	www.faqs.org /rfcs/rfc1549.html (3912 words)

	Generic HDLC layer for Linux
		General HDLC layer for Linux is an interface between low-level hardware drivers for synchronous serial (HDLC) cards and the rest of kernel networking.
		Ethernet framing using HDLC or FR PVC is compatible with 802.1Q VLAN and 802.1D Ethernet bridging.
		If you get "Generic HDLC layer version mismatch" error while compiling sethdlc then either your compiler is using wrong kernel headers (probably from some glibc-kernheaders package) or you haven't patched your kernel tree correctly.
	www.kernel.org /pub/linux/utils/net/hdlc (1161 words)

	Re: [PWE3] draft-ietf-pwe3-hdlc-ppp-encap-mpls-05.txt last call
		The next 6 bits provide a length field, which is used as follows: If the packet's length (defined as the length of the layer 2 payload ----- 2.
		Section 4.1 When the PE detect a status change in the attachment circuit status, *CP: ^detects such as an attachment circuit physical link failure, or the AC is [snip] The HDLC** mode is suitable for port to port transport of Frame Relay UNI or NNI traffic.
		It must be noted, however, that this mode is transparent to the FECN, BECN and DE bits.
	www.ietf.org /mail-archive/web/pwe3/current/msg07088.html (556 words)

	HDLC Bit-Oriented Controller
		Figure 1 shows the block diagram for the Innocor HDLC bit-oriented controller megafunction.
		The Innocor HDLC bit-oriented controller is a high-performance megafunction module for bit-oriented data transmission.
		Table 1 lists the typical device utilization results for the Innocor HDLC Bit-Oriented Controller megafunction.
	www.altera.com /products/ip/communications/hdlc/m-inn-hdlc-bit.html (164 words)

	[No title]
		The Data Link Layer PPP uses the principles described in ISO 3309-1979 HDLC frame structure, most recently the fourth edition 3309:1991 [2], which specifies modifications to allow HDLC use in asynchronous environments.
		The PPP control procedures use the Control field encodings described in ISO 4335-1979 HDLC elements of procedures, most recently the fourth edition 4335:1991 [4].
		This should not be construed to indicate that every feature of the above recommendations are included in PPP.
	www.ietf.org /rfc/rfc1662.txt (4458 words)

	Mailing List Archive: Generic HDLC update
		- 1/2: modularizes generic HDLC code - WAN protocols (FR, Cisco HDLC
		Also we don't have to load things like syncppp or
		"Core" generic HDLC code doesn't now know anything about the
	www.gossamer-threads.com /lists/engine?do=post_view_printable;post=690095;list=linux (219 words)

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	www.develcon.com (193 words)

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