|Step 1 || 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
|Note || 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.
|Step 3 || 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.
|Step 4 || 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.