Cabletron Systems CSX200 CyberSWITCH Installation Manual

Also see for CSX200 CyberSWITCH: Setup guide User guide Configuration guide User guide

Contents

Chapter 2: About the CSX2002-8CSX200 Installation GuideFull-duplex operation places an additional step to half-duplex operation that mirrors the operationfor a peer to validate the authenticator. The peer device challenges the authenticator by generatinga CHAP challenge, and the authenticator returns a CHAP response.The peer device challenges the authenticator device by generating a CHAP challenge, and thechallenge contains your encrypted password and system name. The authenticator device thenapplies a one-way hash algorithm to the random number and returns this encrypted informationalong with the system name in the CHAP response. The peer device then runs the same algorithmand compares the result with the expected value. This authentication method depends upon apassword or secret, known only to both ends locally.LQMLink Quality Monitoring (LQM) is a link control mechanism used with PPP to determine when,and how often, a link is dropping data in units of packets and octets. Link Quality Monitoringaccomplishes this by providing Link-Quality-Reports to determine if the quality of the link isadequate for operation. Link Quality Monitoring provides separate measurements for bothincoming and outgoing packets that are communicated to both ends of the link.The PPP LQM mechanism carefully defines the Link-Quality-Report packet formats, and specifiesreference points for all data transmission and reception measurements. The LQM implementationmaintains successfully received packet and octet counts, and periodically transmits thisinformation to its peer using Link-Quality-Report packets.Multilink ProtocolMultilink Protocol (MP) is an extension of PPP that controls the way frames are transferred acrossseveral links whenever a single link is not sufficient to meet requirements of your present trafficload. Multilink Protocol establishes several simultaneous links between two end points overswitched circuits (dial-up lines) in an ISDN network, and dynamically adjusts the bandwidthdemands between available links to maintain an effective data transfer.ISDNISDN provides an inexpensive switched digital access to remote sites. The ISDN BRI (Basic RateInterface) standard provides for two high speed 64 Kbps bearer (B) channels used for voice or dataconnections and one 16 Kbps signaling data (D) channel used for call setup, signaling, and otherinformation. ISDN allows all types of information to be transferred including voice, data, fax, andvideo. Multiple devices can be linked to a single ISDN connection, each having their owntelephone number. Two or more channels can be combined into a single larger transmission pipeoffering variable transmission speeds.