AirLink Communications Raven X HSDPA Guide de l'utilisateur télécharger pdf (Page 68)

Data Communication and Host Modes

Rev 2.0 Jul.09 61

Note: Regardless if the Raven XE is configured for Public Mode or

Private Mode, the same IP address will be given to all devices

connected to any of the ports. While you can connect with each to the

cellular network and the Internet, you cannot use the Raven XE as a

hub or router to communicate between them.

Internal DHCP Server

DHCP(DynamicHostConfigurationProtocol)hasbecomea

primarycomponentoftoday’snetworkenvironments.DHCP

allowsoneservertoautomaticallyanddynamicallyallocate

networkIPaddressesandothernetworkrelatedsettings(such

assubnetmasks,routers,etc.)toeachcomputerordevice

withouttheneedtosetupeachspecificallyor

keeptrackof

whataddresseshavealreadybeenused.

Inadefaultconfiguration,theRavenXEactsasaDHCPhost

toanydeviceconnectedtoitsports,providingthatdevicewith

anIPaddresswhichcanbeusedtocommunicateonthe

Internet.InPublicMode,thatwillbetheIPaddressassigned

bythecellularnetwork.InPrivate

Mode,thatwillbetheIP

addressdefinedin*HOSTPRIVIP.

1. WhentheRavenXEregistersonthecellularnetwork,itis

assignedanIPaddressfromyourcellularprovided,let’s

say10.1.2.0.

2. ActingasaDHCPserver,inPublicMode,whentheRaven

XEreceivesaDHCPrequestfromanEthernetdevice

connectedviaUSB,ithandsofftheassignedaddresstothe

deviceandsetsupthedefaultgatewayaddressas10.1.2.1.

Ifthefourthoctetisalreadya1,it

assigns10.1.2.2asthe

routeraddress.

3. TheRavenXEalsosendsa/24netmask(255.255.255.0by

default)andsetsupastaticroutewhichmaps

192.168.13.31(ortheaddressconfiguredwith

*HOSTPEERIPifitischanged)to10.1.2.1(or10.1.2.2ifthat

waswhatthegatewayaddresswasgivenas).

Tip: When PPPoE is used with the Raven XE, DHCP is not needed.

A tunnel is set up connecting a device (such as your computer or a

router) with the modem. The device will then simply use the MAC

address of the Raven XE to send all outgoing packets.

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AirLink Communications Raven X HSDPA Guide de l'utilisateur Page 68