Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

ASYNC,Modem,Analog lease line,NM-8A/S,2621

I am trying to configure an analog lease line to connect to a 2621 via an NM-8A/S. The modem is currently connected to a RedHat box on the remote side and a FreeBSD box on our side. I want to move from the FreeBSD box to the 2621.

I need to use the following:

Static IP (remote side)

Compression

No authentication (if possible)

Need to be up without any disconnects due to idle timeouts.

The modem (local side) is set to answer mode and will sync with other end. The port speed on the modem is set to 38.4k. We can get the line status to show the line is up, but the protocol is down. The remote side RedHat box can't start the PPPD when connected to the Cisco, but as soon as we switch back to the FreeBSD it works.

Below is my port configuration..

interface Serial1/7

physical-layer async

description My happy customer

bandwidth 38

ip address xxx.xxx.xxx.21 255.255.255.252

encapsulation ppp

autodetect encapsulation ppp

async default routing

async mode dedicated

Can anyone help with this?

Thanks

David

2 REPLIES
New Member

Re: ASYNC,Modem,Analog lease line,NM-8A/S,2621

The modems are in a dumb state since they can sync regardless of being connected to a piece of equipment or not.

This may be similar to a back to back configuration between routers, but only in async mode.

I just don't know which way to turn..

New Member

Re: ASYNC,Modem,Analog lease line,NM-8A/S,2621

We were able to get it working. Here is the info from the config..

interface Serial1/7

physical-layer async

description My happy client

ip address x.x.x.21 255.255.255.252

encapsulation ppp

async default routing

async mode dedicated

line 40

modem InOut

transport input all

autoselect ppp

stopbits 1

speed 38400

flowcontrol hardware

298
Views
0
Helpful
2
Replies
CreatePlease login to create content