Chapter 03 Common Interface and CableV2.0

7/27/2019 Chapter 03 Common Interface and CableV2.0

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Common LAN interface type and basic features

To understand ordinary network structure

Common WAN interface type and basic features

Common four kinds of logic interfaces

Training Objective


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Ethernet

Token Bus

Token Ring

. . . . .

.

Common LAN Types


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10M Ethernet

100M Ethernet Fast Ethernet

1000M Ethernet Gigabit

Ethernet

Types of Physical Ethernet Interface


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10Base-TOne of the most widely used LAN standards at present, adopts twisted pair

as physical transmission medium

10Base5 Once been widely used for backbone LAN, adopts thick coaxcial cable asphysical transmission medium

10Base2 Adopts thin coaxcial cable as physical transmission medium

10M Ethernet Interface


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Category 3 twisted pair



Category ultra 5 twistedpair


All is 8-pin cable for both shielded andAll is 8-pin cable for both shielded andnon shieldednon shielded

Type of twisted pair is decided by theType of twisted pair is decided by thenumber of twisted rings in an unitnumber of twisted rings in an unit

lenghtlenght

Physical Media for 10Base-T


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Line Sequence of Category 5 Twisted Pair

Straight-through cable

Crossover cable


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Equipment Connections

PC Router Ordinary switch

interfaceUplink switch

interface

Opticalswitch

interface

PC crossover crossover straight-through N/A SC/ST

Router crossover crossover straight-through N/A SC/ST

Ordinary switchinterface

straight-through

straight-through

crossover straight-through N/A

Uplink switch

interfaceN/A N/A straight-through N/A N/A

Optical switchinterface

SC/ST SC/ST N/A N/A SC/ST


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100Base-TX

The physical medium adopts twisted pair ofcategory 5 or above, the max network segment length

is 100m100Base-FX

The physical medium adopts: single-mode fiber,length of a network segment can reach 10 kilometers;

multi-mode fiber, length of a network segment is 2000meters at the most

Fast Ethernet is defined by IEEE 802.3u standard



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1000Base-T

Physical medium adopts twisted pair ofcategory 5 or above, the max length of networksegment is 100m.

1000Base-F

Physical medium adopts single-mode fiber /multi-mode fiber, the max length of networksegment is 500m

IEEE 802.3z and 802.3ab



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Narrowband WAN

PSTN

ISDNDDN

Frame relay

X.25...

WAN

Broadband WAN

ATM

SDH

... ...


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Asynchronous Serial Interface andSynchronous Serial Interface

Asynchronous serial interface:Two kinds of asynchronous serial ports: the synchronous set as asynchronous mode and dedicated

asynchronous serial interface

A asynchronous interface can be set as dedicated line mode and dialing mode, usually it is set as

dialing modeSynchronous serial interface:

Can work under two modes: DTE and DCE

Can connect many types of cables

Supports multi link layer protocols

Supports IP and IPX network layer protocols

"Show interface seria"l command lists many informations


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DB50 router end --DB25 end to externalnetwork

V.24DTE cable

Pin type plug

The Mechanical Features of V.24 Regulations

Can work under synchronous and asynchronous modesHighest transmission rate under asynchronous mode is 115200bps

Highest transmission rate under synchronous mode is 64000bps


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DB50router end--DB25end to external network

V.24 DCEcable

Hole type plug

The Mechanical Features of V.24 Procedure

Th El i l F T i i R


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There are WAN, AUX, 8AS and Console that use V.24 in routers.The RS-232 level that is up to standard12V

Transmission rate and distance

The Electrical Features, Transmission Rateand Distance of V.24

Bit ratebps The max transmission distance (meter)2400 60

4800 60

9600 30

19200 30

38400 20

64000 20

115200 10


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D B 3 4 end to ex terna l network - -DB50 router end

34-pin type plug at DTEend

34-hole type plug at DCE

This should be a DTEcable!

The Mechanical Features of V.35 Regulations

Th El t i l F t T i i R t


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Control channel comply with the level standard of RS-232:12V

Data and clock comply with V.35 level standard:0.5V

The max transmission rate under synchronous mdoe is: 2048000 bps

EIA/TIA-V.35 cable rate and transmission distance

Bit ratebps The max transmissiondistance (meter)

2400 1250

4800 625

9600 312

19200 15638400 78

56000 60

64000 50

2048000 30

The Electrical Features, Transmission Rateand Distance of V.35


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BRI interface: 2B+D

Uinterface, uses 2-pin RJ-11 or RJ-45 connectors

S/T interface, uses 4-pin RJ-45 connector

PRI interface appears as CE1/PRI interface onQuidway R series routers

ISDN BRI Interface


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The connector with BNC header is used to connect the network end of 75-ohm non

balanced coax cable

CE1/PRI Interface

The cable with RJ-45 crystal header is used to connect the network end of 120-ohmbalanced shielded twisted pair


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Introduction to Logic Interface

Logic interface includes: Dialer (fordialing)interface,sub-interface,backupcenterlogicchannel

and virtual template

Dialer interfaceistheinterfacefor dialing. Thedialer interfacethat Quidwayseries routers

supportincludes:synchronousserialinterfaceasynchronousserialinterface,ISDNBRIinterface

and ISDN PRI interface.

Used for legacy DDR and profileDDR

The command is: interface dialer 0

og ca n er ace


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og ca n er ace --Sub-interface

The sub-interface refers to many logical interfaces realized on one physical interface

At working, several logical interfaces sharethephysical configurationparametersof thephysical

interface, while they also have their respective link layer and network layer configuration parameters

Thesub-interfacesupportedincludes:Ethernetinterface,WANinterfaceencapsulatedwithframerelayand X.25

interface serial interface-number.subinterface-number [multipoint | point-to-point]

ac up en er og c


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ac up en er og cChannel

In order to improve network reliability, VRP uses a backup center to provide perfect backup function.

The backup center can provide the inter-backup between different interfaces

Can use a virtual circuit as the main interface or backup interface.

Asubscribercanappointacorrespondinglogicchannelfortheabovevirtualcircuit,andconfigurethe

backup center working parameters in the logic channelUse the following command under whole station mode:

logic-channellogic-channel-number


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Virtual-template

Mainly applied to the environments like VPN and MP

After setting up VPN session connection, a virtual interface needs to becreatedfordataexchange

with the opposite end

AfterbundlingmultiplePPPlinksintoaMP,avirtual interfacealsoneeds tobecreatedfordata

exchange with the opposite end

interface virtual-templatevirtual-template-number


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Summary

Cables used in common LAN:s twisted pair, optical fiber

Features of various kinds of categories of twisted pairs and fibers

Synchronous serial interface and asynchronous serial interface

The physical features and transmission features of V.24 and V.35 cables

Features of ISDN BRI and CE1/PRI interfaces

Features of common logical interfces

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Chapter 03 Common Interface and CableV2.0