DSLW DO NOT TAKE UP THE PEER

[a.belleli]

I put this configuration over a CISCO 2612 with double serial interface

The serial 0 is connected with the peer

The serial 0/1 itsn't.

The FEP is an IBM 3174 .

I check the configuration in a test before apply in the production environment

and it works both.

I had only change a serial cable with a double one (DCE , V.24).

********************************************************************

This is the Serial 0/1-(NOT Working)

Serial0/1 is up, line protocol is up

Hardware is PowerQUICC Serial

Description: Control Unit Stampante Cedole

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

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

Encapsulation SDLC, loopback not set

Half-duplex enabled.

cts-delay 0 milliseconds

Errors - 0 half duplex violation

Router link station role: PRIMARY (DCE)

Router link station metrics:

slow-poll 10 seconds

T1 (reply time out) 3000 milliseconds

N1 (max frame size) 12016 bits

N2 (retry count) 20

poll-pause-timer 10 milliseconds

poll-limit-value 1

k (windowsize) 7

modulo 8

sdlc vmac: 4000.3274.00--

sdlc addr 98 state is SNRMSENT

cls_state is CLS_STN_CLOSED

VS 0, VR 0, Remote VR 0, Current retransmit count 247

Hold queue: 0/200 IFRAMEs 0/0

TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0

RNRs 0/0 SNRMs 17421/0 DISC/RDs 0/0 REJs 0/0

Poll: set, Poll count: 0, chain: 98/98

Last input never, output 00:00:02, output hang never

Last clearing of "show interface" counters 15:06:33

Queueing strategy: fifo

Output queue 0/40, 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

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

16402 packets output, 32804 bytes, 0 underruns

0 output errors, 0 collisions, 21 interface resets

0 output buffer failures, 0 output buffers swapped out

31446 carrier transitions

DCD=up DSR=up DTR=up RTS=down CTS=down

********************************************************************

Thank you

[r-godden]

set RTS high on the 3174 , question 340 should be 1.

[a.belleli]

Thank for your answer,

Can you explain better which and where step I had to do?

Many thanks

[r-godden]

A cisco router when using a DCE cable expects the 3174 to have request to send high all the time, the normal operation of a 3174 is to raise and drop RTS as when it has data to send. By confguring ther 3174 with RTS high by setting question 340 to 1 will do the trick.

If a dte cable on the router and a modem eliminator to the 3174 was being used then rts raising and dropping wont present a problem. This is because RTS is sent to the DCE the (modem eliminator ), the modem eliminator will then send CTS clear to send to the 3174 and data transfer occurs etc etc.

I hope this helps .