Sierra Wireless EV-DO Instrukcja Użytkownika Strona 74

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Data Communication and Host Modes
Rev 3.0B Feb.08 69
1. WhenthePinPointEregistersonthecellularnetwork,itis
assignedanIPaddressfromVerizon,let’ssayA.B.C.D.
2. ActingasaDHCPserver,inPublicMode,whenthe
PinPointEreceivesaDHCPrequestfromanEthernet
device,ithandsofftheassignedaddresstothedeviceand
setsupthedefaultgatewayaddressasA.B.C.1.Ifthe
fourthoctetisalreadya1,itassignsA.B.C.2as
therouter
address.
3. ThePinPointEalsosendsa/24netmask(255.255.255.0by
default)andsetsupastaticroutewhichmaps
192.168.13.31(ortheaddressconfiguredwith
*HOSTPEERIPifitischanged)toA.B.C.1(orA.B.C.2if
thatwaswhatthegatewayaddresswasgivenas).
Tip: When PPPoE is used with the PinPoint-E, 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 PinPoint-E to send all outgoing packets.
Keepalive
Keepaliveisusedtotesttheconnectiontothecellularnetwork
bypinginganIPaddressafteraspecifiedperiodofinactivity.
Keepaliveisonlyrecommendedforuserswhohavearemote
terminatedmodemthatinfrequentlycommunicatestothe
networkorifyouhaveexperiencedissuesovertimewherethe
modem
cannolongerbereachedremotely.
WhenKeepalivepingstheIPaddress,anacknowledgement
indicatesthereisanactiveconnectiontothenetwork.Ifthe
PinPointEdoesnotreceivearesponsefromtheIPaddress,it
willmakeadditionalattempts accordingtoabackoffalgorithm
beforedeterminingtheInternetconnectionisnotfunctioning
properly.Ifit
determinestheconnectionisnotfunctioning,the
modemwillthenattempttoreconnecttoVerizontoreestablish
IPconnectivity.
Configuring Keepalive
InAceManager,theKeepalivesettingsarepartoftheOther
group.
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