PM3 <-> Cisco

Alex Rubenstein (alex@nac.net)
Wed, 9 Apr 1997 12:43:39 -0400 (EDT)

We have a PM3, running 3.5.1b8, using chann lized T1. The fourth segement
of the chan T1 goes to a 56k customer. This is line1. Line0 is a PRI.

every (insert number from 1 to 30 minutes), the connection resets.
Watching the output of the Livingston, I see the following:

Received LCP_ECHO_REQUEST on port W25 of 8 bytes containing:
09 06 00 0c 70 60 f2 b0 ff 01 b2 50

Sending LCP_ECHO_REPLY to port W25 of 12 bytes containing:
0a 06 00 0c b4 6a 01 64 ff 01 b2 50

Couldn't send LCP_ECHO_REPLY

Then, I get this in the syslog:
===============================

Apr 9 12:40:38 nac-whi8-e0-10mb dialnet: port W25 session disconnected
dest nac-tds-1/1-56k.nac.net

Apr 9 12:40:39 nac-whi8-e0-10mb dialnet: port W25 connection succeeded
dest nac-tds-1/1-56k.nac.net

Which is:
=========

Received LCP_PROTOCOL_REJECT on port W25 of 1244 bytes containing:
08 8e 04 e0 74 77 61 72 65 20 64 65 76 65 6c 6f
70 6d 65 6e 74 20 68 6f 75 73 65 2e 20 20 54 68
65 20 63 6f 6d 70 61 6e 79 20 64 65 73 69 67 6e
73 2c 20 6d 61 72 6b 65 74 73 20 61 6e 64 0d 0a
73 65 6c 6c 73 20 61 20 66 61 6d 69 6c 79 20 6f
66 20 64 69 67 69 74 61 6c 20 69 64 65 6e 74 69
66 69 63 61

Received IPCP_CONFIGURE_REQUEST on port W25 of 6 bytes containing:
01 0b 00 0a 03 06 cf 63 07 0a

Sending LCP_CONFIGURE_REQUEST to port W25 of 10 bytes containing:
01 01 00 0a 05 06 32 95 04 a1

Received LCP_CONFIGURE_REQUEST on port W25 of 6 bytes containing:
01 8f 00 0a 05 06 70 62 29 69

Sending LCP_CONFIGURE_ACK to port W25 of 10 bytes containing:
02 8f 00 0a 05 06 70 62 29 69

Received LCP_CONFIGURE_ACK on port W25 of 6 bytes containing:
02 01 00 0a 05 06 32 95 04 a1

W25: LCP Open

Sending IPCP_CONFIGURE_REQUEST to port W25 of 10 bytes containing:
01 01 00 0a 03 06 cf 63 07 09

Received IPCP_CONFIGURE_REQUEST on port W25 of 6 bytes containing:
01 0c 00 0a 03 06 cf 63 07 0a

Sending IPCP_CONFIGURE_ACK to port W25 of 10 bytes containing:
02 0c 00 0a 03 06 cf 63 07 0a

Received IPCP_CONFIGURE_ACK on port W25 of 6 bytes containing:
02 01 00 0a 03 06 cf 63 07 09

W25: IPCP Open
LCP IPCP Open

Connection Succeeded

And, then I get few succesfully ECHO's before it dies:
=======================================================

Received LCP_ECHO_REQUEST on port W25 of 8 bytes containing:
09 01 00 0c 70 62 29 69 ff 01 b2 4f
Sending LCP_ECHO_REPLY to port W25 of 12 bytes containing:
0a 01 00 0c 32 95 04 a1 ff 01 b2 4f

Received LCP_ECHO_REQUEST on port W25 of 8 bytes containing:
09 02 00 0c 70 62 29 69 ff 01 b2 4f
Sending LCP_ECHO_REPLY to port W25 of 12 bytes containing:
0a 02 00 0c 32 95 04 a1 ff 01 b2 4f

Received LCP_ECHO_REQUEST on port W25 of 8 bytes containing:
09 03 00 0c 70 62 29 69 ff 01 b2 4f
Sending LCP_ECHO_REPLY to port W25 of 12 bytes containing:
0a 03 00 0c 32 95 04 a1 ff 01 b2 4f
Couldn't send LCP_ECHO_REPLY

Received LCP_ECHO_REQUEST on port W25 of 8 bytes containing:
09 04 00 0c 70 62 29 69 ff 01 b2 4f
Sending LCP_ECHO_REPLY to port W25 of 12 bytes containing:
0a 04 00 0c 32 95 04 a1 ff 01 b2 4f
Couldn't send LCP_ECHO_REPLY

nac-whi8> sho line1
---------------------- line1 - T1 Fractional ---------------

Status: UP Framing: ESF Encoding: B8ZS PCM: u-law

Channel
Group Speed Channels
----- ------- ------------------------------------------------------------
2 56K 1
3 56K 4

Receive Level: +2dB to -7.5dB

Alarms Violations
----------------------------- -----------------------------
Blue 0 Bipolar 0
Yellow 0 CRC Errors 0
Receive Carrier Loss 0 Multiframe Sync 0
Loss of Sync 0

nac-whi8> sho w25
----------------------- Current Status - Port W25
Status: ESTABLISHED
Input: 542616 Abort Errors: 63
Output: 10563048 CRC Errors: 0
Pending: 0 Overrun Errors: 0
TX Errors: 0 Frame Errors: 0
Modem Status: DCD+ CTS+

Active Configuration Default Configuration
-------------------- ---------------------
Port Type: Netwrk Netwrk (Hardwired)
Line Speed: Ext 56K Ext Clock
Modem Control: off off
Remote Host: nac-tds-1/1-56k.nac.net nac-tds-1/1-56k.nac.net
Local Address: 207.99.7.9 207.99.7.9
Netmask: 255.255.255.252 255.255.255.252
Interface: ptp25 (PPP,Quiet) (PPP,Quiet)
Mtu: 1500 0
Dial Group: 0