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ccna 2 price.Figure 14-9 Results of closing the R2 and R3 access linksAs shown in Figure 14-9, R1 is connected to R2 via VC with a point-to-point subinterface (S0/0/0.2) and associated VC to R3 (103) and R4 (104) with a multipoint subinterface (S0/0/0.34). o The beginning of Example 14-20 shows that S0/0/0.2 is in the down/ down state because the unique DLCI (102) is inactive. However, S0/0/0.34 has two DLCIs, one of which is active, so the IOS assumes that S0/0/0.34 is in the up/up state.When troubleshooting, it is useful to check the interface status. Keep in mind that just because a subinterface is in the up state, but if it is a multipoint subinterface, then the up/up state does not mean that all the DLCIs associated with that interface are functioning properly.5. Mapping Problems with Frame Relay (Step 4)If the first 3 steps of the troubleshooting process recommended in this chapter are followed and each step is resolved, the access link interface on each router should be in the up/up state at this point and the PVC between the two routers should be in the active (or inactive) state. If the router still cannot ping through to the other Frame Relay IP address, the next step to check is the Frame Relay address mapping information, i.e., mapping the DLCI to the next-hop IP address.This subsection will not go over what is covered in this chapter regarding address mapping. However, the following list can provide some tips and clues when performing this troubleshooting step.For point-to-point subinterfaces:,words. These subinterfaces do not require reverse ARP or static mapping. [rinddot. the IOS automatically maps other IP addresses on the same subnet to a point-to-point subinterface because they are reachable only through the DLCI of that subinterface.The output of the show frame-relaymap command still lists the point-to-point subinterface but does not have the IP address of the next hop.For physical interfaces and multipoint sub-interfaces:,/Full-earnings. Reverse ARP or static mapping is required. [ringer dot.showframe-relay map command should list the Frame Relay IP address of the remote router and each PVC local router associated with that interface or subinterfaceof the local DLCI.