hdlc

High-Level Data Link Control (HDLC) is a bit-oriented data link layer protocol for data transmission over the synchronization network. It is an International Organization for Standardization (ISO) developed based on the ibm sdlc (synchronous Data Link Control) protocol.The Link Control Protocol focuses on the logical transmission of segments into physical blocks or packets. A block or packet is guided by the Starting Sign and ended by the ending sign,

4.1 basic HDLC Configuration Purpose: 1. master the basic configurations of HDLC. 2. Understand the HDLC Encapsulation Format. Tutorial topology: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/06195955L-0.png "title =" 4.1.png "/> Tutorial steps: 1. Deploy the HDLC encapsulation and IP

Package for synchronous serial link (serail point-to-point link)3.1-hdlc/ppp High-level Data link Control HDLC (high-level Data Link controls): is a bit-oriented synchronous data Link layer protocol developed by ISO, developed by the SDLC protocol. HDLC Specifies the encapsulation on a synchronous serial line by using frame characters and checksums, and

Routers are often used to build wide-area networks, and the footprints of WAN links are very different from those on Ethernet. Common WAN packages are HDLC, PPP, Frame-relay, etc., and this chapter describes HDLC and PPP. PPP, in contrast, has more functions than HDLC.1.1.1 HDLC IntroductionHDLC is a frame-wrapping for

HDLC frame format In HDLc, data and control packets are transmitted in the standard frame format. Frames in HDLC are similar to BSC character blocks, but the datagram and control packets in the BSC protocol are transmitted independently. commands in HDLC should be transmitted by frame in a unified format. The

an encapsulation protocol for IP traffic transfer between two peer nodes. In the TCP-IP protocol, it is a Data Link layer protocol (the second layer in the OSI schema) used to synchronize the modulation connection, instead of the original nonstandard second layer protocol, SLIP. In addition to IP, PPP can carry other protocols, including DECnet and Novell's Internet Packet Exchange (IPX).Iii. HDLChdlc---bit-oriented synchronization protocol: High-level Data link control (Advanced Information li

PPP Protocol (Point-to-place protocol) belongs to the network interface layer, which is mainly used for dial-up internet access. PPP has the ability to dynamically assign IP addresses, allows IP addresses to be negotiated at the time of connection, has error detection and correction capability, and supports data compression; in order to establish point-to-point link traffic, each end of the PPP link must first send the LCP packet to set up and test the data link. After the link is established an

I. Applicable conditions: 1. DDN is the main line, and PSTN is the standby line. 2. The HDLC protocol is used on DDN and the PPP protocol is used on PSTN. 3. dynamic routing can be performed on the main line or the standby line. In this example, dynamic routing is performed on the main line. II, Network Topology: Iii. Solution description: HDLC support is one of the most impor

"title=" PPP package. png "Width=" 393 "height=" "border=" 0 "hspace=" 0 "vspace=" 0 "style=" width : 393px;height:300px; "alt=" Wkiom1feyfvcg9ypaabbxrxxp7c750.png-wh_50 "/> HDLC Protocol HDLC is a typical representative of the bit-oriented data Link Control protocol, which does not depend on any kind of character encoding set, the data message can be transparently transmitted, the "0-bit insertion meth

HDLC is the default protocol used by CISCO routers. A new router uses HDLC Encapsulation by default when no encapsulation protocol is specified.1. Related commandsPort Settings　 Note: 1. The following example shows the Cisco synchronous serial port status.Router # show interface serial 0Serial 0 is up, line protocol is upHardware is MCI SerialInternet address is 150.136.190.203, subnet mask is 255.255.255.0

1. Related commands Port setting Task CommandSet HDLC encapsulation hdlcSet the DCE line speed to clockrate speedResets a hardware interface, clear interface serial unit.Show interface status show interfaces serial [unit] 1Note: 1. The following example shows the Cisco synchronous serial port status.Router # show interface serial 0Serial 0 is up, line protocol is upHardware is MCI SerialInternet address is 150.136.190.203, subnet mask is 255.255.255.0

Receives a packet from a upper layer is previously passed by a call toNdismindicatereceivepacket. No Miniportsend Transmits a packet through the NIC onto the network. Required if the driver has nominiportsendpackets or miniportwansend function. Yes Miniportsendpackets Transmits an array of packets through the NIC onto the network. Yes Miniportsetinformation Changes information about the miniport driver or its NIC.

In today's era of rapid network development, routers play an important role. Because the router acts as a relay system in the network layer, Provides a routing and forwarding function for data between the third-tier networks. Therefore, the functions, functions, and basic configurations of routers must be mastered as members of the IT industry. In the following, we will make a brief analysis on the vro from two aspects: how to set up the simplest network environment in the experiment, common si

In today's era of rapid network development, routers play an important role. Because the router acts as a relay system in the network layer,Provides a routing and forwarding function for data between the third-tier networks. Therefore, the functions, functions, and basic configurations of routers must be mastered as members of the IT industry.In the following, we will make a brief analysis on the vro from two aspects: how to set up the simplest network environment in the experiment, common situa

There are many things worth learning about in the PPP protocol. Here we will focus on the content of PPP frame relay. First, let's take a look at the basic concepts. PPP: Point-to-Point Protocol. Huawei routers are encapsulated by default and are character-oriented control protocols. HDLC: Advanced Data Link Control Protocol. It is a bit-Oriented Control Protocol and is the default encapsulation of Cisco routers. Fram-relay: indicates the Frame relay

onlySerial Devices with high speed and high real-time performance can also be connected to the Internet.2. architecture of the serial communication serverIn practical applications,Various monitoring and control devices use serial communication to communicate with the outside world. Serial devices vary widely, especially in terms of data transmission rate and data format.UART (Universal Asynchronous ReceiverHigh-level data link (HDLC)Control, Advanced

does not display any packets that do not conform to the access list standard. More information about this processInformationFor more information about Ping and Traceroute, seeCommand.For more information about how to create an access listInformationSee the document "Configure IP address access list.Conditional debuggingWhen conditional debugging is enabled, the router generates debugging messages for packets sent or received on the router of a specific interface. For packets sent or transmitted

networks is set to 192.1.0.65. Because the Serial 0 address on Router1 is 192.200.10.5 and 192.200.10.4/30 belong to a directly connected network, there is a path to access 192.200.10.4/30, so you do not need to add a static route on router1. Router1: Ip route 192.1.0.64 route 192 192.200.10.6 Router3: Ip route 192.1.0.128 255.255.255.192 192.1.0.65 Ip route 192.200.10.4 route 255.252 192.1.0.65 At the same time, because Router3 is no longer connected to other routers except router Router2, you

Computer network is more and more important in today's life, so we learn the network knowledge is very necessary. Network communication is divided into 5 layers, namely: physical layer, Data link layer, network layer, Transport layer, application layer.In the data link layer is responsible for the transmission of data, there are many kinds of protocols, the most used is the Ethernet protocol in the LAN, and the PPP protocol in the WAN, HDLC protocol.E

connected */Struct list_head clist;/* link in List of channels per unit */Rwlock_t upl;/* protects 'ppp '*/...}; Struct ppp_channel {Void * private;/* channel private data */Struct ppp_channel_ops * OPS;/* operations for this channel */Int MTU;/* max transmit packet size */Int hdrlen;/* Amount of headroom channel needs */Void * PPP;/* opaque to channel *//* The following are not used at present */Int speed;/* Transfer Rate (Bytes/second )*/Int latency;/* overhead time in milliseconds */}; Stati