Frame Relay Commands
9-86 Configuring Frame Relay
Oncechosenasstatic,noinverseARPwillbesentoutbydefault.AfreeinverseARPrequest
(similartoabove)canberequestedbythiscommand.
Oncechosenasstatic,thisDLCIcanbemadetorespondtoabroadcastbootpmessageenteringon
thisDLCIfromtheframerelaynetwork.NonbroadcastbootpwillstillbesenttothelocalDHCP
serverorrelayedtotheIPhelperaddressserver..
Syntax
frame-relay interface-dlci nn [[keep-alive nn [gratuitous-inverse-arp]] |
[gratuitous-inverse-arp [keep-alive nn]] | [ip A.B.C.D [[bootp [[gratuitous-
inverse-arp [keep-alive nn]] | [keep-alive nn [gratuitous-inverse-arp]]]] |
[gratuitous-inverse-arp [[bootp [keep-alive nn]] | [keep-alive nn [bootp]]]] |
[keep-alive nn [[gratuitous-inverse-arp [bootp]] | [bootp [gratuitous-inverse-
arp]]]]]]]
Syntax of the “no” Form
UsethenocommandtodeletetheDLCIfromthespecifiedsubinterface:
no frame-relay interface-dlci dlci-num
Mode
Subinterfaceconfiguration:XSR(config-subif<xx>)#
Notes: The remote site must support sending inverse-arp responses or the interface will come
down.
An inverse arp is sent from the XSR at a rate of 1 every 4 seconds. It is not configurable.
interface-dlci
nn
DLCInumberforthesubinterface,rangingfrom16to1007.ForthePoint
toPoint(P2P)subinterfacetype,onlyoneDLCIisallowed.ForPointto
MultiPoint(P2MP)youcanconfiguremultipleDLCIs.
gratuitous-
inverse-arp
SendsinverseARPrequestandignoresaresponse.Thisparameteroccurs
fornonstaticIPmapping.P2Psubinterfaceswillgenerateafreeinversearp
toallowtheremotesidetolearntheIPaddressofthissubinterface.This
parameterisusefulonlyforP2Psubinterfaces,sincePointtoMultiPoint
interfaceswithdynamicIPresolutionwillalwaysinverseARPtolearnthe
remotenodeʹsIPaddress.OmittingthisvalueinaP2Psubinterface
preventssendinganinversearprequest.Aninversearpresponseisalways
sentwhenaninversearprequestisreceived.Broadcastbootpisnot
supportedindynamicmode.Allbootprequestinthismodeareforwarded.
ip ProtocoltypetosetstaticIPaddresstoDLCImapping.
A.B.C.D StaticIPaddressofpeernode.Noaddresscheckingdone.
bootp RespondtoabroadcastbootprequestwithstaticIPaddress (usedfor
RemoteAutoInstallCentralSite).
gratuitous-
inverse-arp
SendsinverseARPrequest.Responseisignored.ValidforbothMP2P&
P2Psubinterfaces.
keep-alive nn nnreferstothedurationthataDLCIunderaP2Pinterfacewillwaitwithno
trafficbeingreceivedbeforesendinganinversearppackettoconfirmthat
theremotesideisstillpresent.Thennrangeis10to600seconds.