Dial in to the NAS from a client PC.
Ensure that the client PC is able to connect to the NAS by establishing a dial-in connection. As the call comes into the NAS, a LINK-3-UPDOWN message automatically appears on the NAS terminal screen. In the following example, the call comes into the NAS on asynchronous interface 14:
*Jan 1 21:22:18.410: %LINK-3-UPDOWN: Interface Async14, changed state to up
|| No debug commands are turned on to display this log message. This message should be displayed within 30 seconds after the client first sends the call.
If this message is not displayed by the NAS, there is a problem with the dial-in configuration.
show caller user user
Enter this command on the tunnel server to verify that the client received an IP address. The following example shows that user3 is using IP address 172.30.2.1.
Router# show caller user firstname.lastname@example.org User: email@example.com, line Vi1, service PPP L2F, active 00:01:35 PPP: LCP Open, CHAP (<- AAA), IPCP IP: Local 172.22.66.25, remote 172.30.2.1 VPDN: NAS ISP-NAS, MID 1, MID open HGW ENT-TS, NAS CLID 36, HGW CLID 1, tunnel open Counts: 105 packets input, 8979 bytes, 0 no buffer 0 input errors, 0 CRC, 0 frame, 0 overrun 18 packets output, 295 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets
If an incorrect IP address or no IP address is displayed, there is a problem with IP addresses assignment. Verify the configuration of the peer default ip address command in the virtual template on the tunnel server.
show interfaces virtual-access number
Enter this command to verify that the interface is up, that LCP is open, and that no errors are reported. The following output shows a functional interface:
Router# show interfaces virtual-access 1 Virtual-Access1 is up, line protocol is up Hardware is Virtual Access interface Interface is unnumbered. Using address of FastEthernet0/0 (172.22.66.25) MTU 1500 bytes, BW 115 Kbit, DLY 100000 usec, reliablility 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, loopback not set, keepalive set (10 sec) DTR is pulsed for 5 seconds on reset LCP Open Open: IPCP Last input 00:00:02, output never, output hang never Last clearing of "show interface" counters 3d00h Queueing strategy: fifo Output queue 1/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 114 packets input, 9563 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 27 packets output, 864 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions
The virtual access interface is up and the line protocol is up, showing that virtual interface establishment was successful.