User guide

Data Communication and Host Modes
Rev 3.0D Jul.09 66
• *HOSTPEERIP‐SettotheIPaddressyouwantforthe
RavenXT.
• *HOSTNETMASK‐Settothesubnetmask,generally
255.255.255.0.
Tip: If you are using Private Mode (*HOSTPRIVMODE=1), you will
need to make sure that *HOSTPRIVIP and *HOSTPEERIP are on the
same subnet. If the subnet mask is 255.255.255.0, it is safe to use
192.168.x.y for each as long as the x is the same number (0 in the
example screen shot above) and the y is different (1 and 2 in the
example) and between 0 and 254.
Note: Regardless if the Raven XT 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 XT 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XT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XTregistersonthecellularnetwork,itis
assignedanIPaddressfromyourcellularprovider,let’s
say10.1.2.0.
2. ActingasaDHCPserver,inPublicMode,whentheRaven
XTreceivesaDHCPrequestfromanEthernetdevice
connectedviaUS B,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XTalsosend s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