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i can't clear async interface

hi,

i have a Cisco 1760 with 12.2(2)XK2. leased line on serial0 and a backup configuration from async interface. modem is attached to aux port. this router is connected to the central office previously, but now it can not connect any more. the answers to sh int async 5 and sh dialer are as follows when the configuration of interface se 0 is including "backup interface async 5" command:

TORBALI#sh int async 5

Async5 is standby mode, line protocol is down

Hardware is Async Serial

Internet address is 10.10.20.2/24

MTU 1500 bytes, BW 115 Kbit, DLY 100000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, loopback not set

DTR is pulsed for 5 seconds on reset

LCP Closed

Closed: BRIDGECP, IPCP, CCP, CDPCP, LLC2, BACP, IPV6CP

Last input never, output 6w6d, output hang never

Last clearing of "show interface" counters 00:15:36

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/1/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 86 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 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

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

TORBALI#

TORBALI#sh dialer

As5 - dialer type = IN-BAND ASYNC NO-PARITY

Idle timer (120 secs), Fast idle timer (20 secs)

Wait for carrier (30 secs), Re-enable (15 secs)

Dialer state is shutdown

Dial String Successes Failures Last DNIS Last status

4463066 0 4 20:25:14 failed Default

TORBALI#

it must say dialer state is idle. am i wrong?

i can't clear the async interface. when i shut this port any log information isn't created by router which says the port is administratively down. and i can't see any shutdown row in the running configuration. i tried to delete async interface by no int command but again after deleting i got the same answer to sh dialer command.

debugging logs are as follows when dialing:

TORBALI#

6w6d: TTY5: restoring DTR

6w6d: TTY5: Set DTR to 1

6w6d: TTY5: autoconfigure probe started

6w6d: As5 DDR: re-enable timeout

6w6d: As5 DDR: Dialing cause ip (s=10.10.20.2, d=224.0.0.10)

6w6d: As5 DDR: Attempting to dial 4463066

6w6d: CHAT5: Attempting async line dialer script

6w6d: CHAT5: Dialing using Modem script: arama & System script: none

6w6d: CHAT5: process started

6w6d: CHAT5: Asserting DTR

6w6d: TTY5: Set DTR to 1

6w6d: CHAT5: Chat script arama started

6w6d: CHAT5: Sending string: AT

6w6d: CHAT5: Expecting string: OK

6w6d: CHAT5: Completed match for expect: OK

6w6d: CHAT5: Sending string: atdt\T<4463066>

6w6d: CHAT5: Expecting string: CONNECT

6w6d: CHAT5: Timeout expecting: CONNECT

6w6d: CHAT5: Chat script arama finished, status = Connection timed out; remote h

ost not responding

6w6d: TTY5: Line reset by "Async dialer"

6w6d: As5 DDR: disconnecting call

6w6d: TTY5: Modem: (unknown)->HANGUP

6w6d: TTY5: Modem: (unknown)->HANGUP

6w6d: TTY5: no timer type 1 to destroy

6w6d: TTY5: no timer type 3 to destroy

6w6d: TTY5: no timer type 4 to destroy

6w6d: TTY5: no timer type 2 to destroy

6w6d: TTY5: dropping DTR, hanging up

6w6d: TTY5: Set DTR to 0

6w6d: tty5: Modem: HANGUP->IDLE

6w6d: TTY5: restoring DTR

6w6d: TTY5: Set DTR to 1

6w6d: TTY5: autoconfigure probe started

=======================

TORBALI#

6w6d: CHAT5: Chat script arama finished, status = Connection timed out; remote h

ost not responding

6w6d: Async5: Async Interface dial-out failure

6w6d: As5 DDR: disconnecting call

6w6d: TTY5: Modem command: --AT&F&C1&D2&H1&R2&M4&K1&B1S0=1H0--

6w6d: TTY5: Modem configuration succeeded

6w6d: TTY5: detection speed (115200) response ---OK---

6w6d: TTY5: Done with modem configuration

6w6d: As5 DDR: re-enable timeout

6w6d: As5 DDR: Dialing cause ip (s=10.10.20.2, d=224.0.0.10)

6w6d: As5 DDR: Attempting to dial 4463066

6w6d: CHAT5: Attempting async line dialer script

6w6d: CHAT5: Dialing using Modem script: arama & System script: none

6w6d: CHAT5: process started

6w6d: CHAT5: Asserting DTR

6w6d: CHAT5: Chat script arama started

==========================================

i haven't reloaded the router yet. is there a way to make this router to dial back up with this async interface?

thanks.

y.oguz

1 REPLY
Bronze

Re: i can't clear async interface

If the async interface is in standby mode, this means that the primary interface (serial 0 in your case) should still have the line protocol up, in which case dialing will not be successful. With the "backup" command, the primary interface has to be line protocol down before dialing can successfully occur.

It looks like there may be a problem with the remote modem answering, too:

6w6d: CHAT5: Sending string: atdt\T<4463066>

6w6d: CHAT5: Expecting string: CONNECT

6w6d: CHAT5: Timeout expecting: CONNECT

You might try adding or increasing the TIMEOUT while waiting for the CONNECT message; it should be at least 60 seconds. Note that when troubleshooting, it is often times useful to have msec timestamps for the debug. Configure:

serv time de da ms

serv time lo da ms

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