An outage, from our side looks like (slightly despammed):
W1) LMI: Sending Sequence Exchange - Sequence 54
frm_slifread(W1): addr:0xfcf1 cntrl:0x3 nlpid:0x9 data:13 status:0
(W1) LMI Dump: 00 7d 01 01 01 03 02 b3 35
(W1) LMI: Received Sequence Exchange - Sequence 179
frm_slifread(W1): addr:0x0421 cntrl:0x3 nlpid:0xcc data:936 status:0
[whole slew or packets deleted]
frm_slifread(W1): addr:0x0421 cntrl:0x3 nlpid:0xcc data:296 status:0
(W1) LMI: Sending Sequence Exchange - Sequence 55
Command> (W1) LMI: Sending Full Status Enquiry - Sequence 56
Note that at this point, we haven't gotten a response to Sequence 55 or 56...
so I go look at the port (and yes, the port is really that ugly -- some of that
is from testing, but I see lots of CRC/Abort and Frame errors)
----------------------- Current Status - Port W1 ---------------------------
Status: ESTABLISHED
Input: 232003192 Abort Errors: 6344/4
Output: 30180043 CRC Errors: 724
Pending: 0 Overrun Errors: 1
TX Errors: 1 Frame Errors: 151
Modem Status: DCD+ CTS+
Active Configuration Default Configuration
-------------------- ---------------------
Port Type: Netwrk Netwrk (Hardwired)
Line Speed: Ext 384K Ext Clock
Modem Control: on on
Local Address: pm-1-w1.edmonds.cmc.net pm-1-w1.edmonds.cmc.net
Netmask: 255.255.255.252 255.255.255.252
Interface: frmW1 (FRM,Listen) (FRM,Quiet)
Mtu: 1500 0
Pkt Filters: In:w1.in Out:
Dial Group: 0
LMI Poll Int: 10 (seconds)
Old DLCI List: 18:206.102.31.186
Command>
At this point the Livingston seems to figure something is wrong and starts
requesting a full status... But still hears nothing. (Note that I'm not
receiving a thing either... not just no LMI, but no data either, since there's
no slifread's.)
(W1) LMI: Sending Full Status Enquiry - Sequence 57
(W1) LMI: Sending Full Status Enquiry - Sequence 58
Around here, MCI decides the line is down and tells our Cisco to kill it:
Message from syslogd@sauron at Thu Aug 28 18:28:43 1997 ...
sauron 3982: %FR-5-DLCICHANGE: Interface Serial2 - DLCI 19 state changed to
INACTIVE
Message from syslogd@sauron at Thu Aug 28 18:28:43 1997 ...
sauron 3983: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2.2, changed
state to down
Though, it looks like the Livingston is more forgiving:
Command> (W1) LMI: Sending Full Status Enquiry - Sequence 59
Command> show w1
----------------------- Current Status - Port W1 ---------------------------
Status: ESTABLISHED
Input: 232003192 Abort Errors: 6344/4
Output: 30193900 CRC Errors: 724
Pending: 0 Overrun Errors: 1
TX Errors: 1 Frame Errors: 151
Modem Status: DCD+ CTS+
Active Configuration Default Configuration
-------------------- ---------------------
Port Type: Netwrk Netwrk (Hardwired)
Line Speed: Ext 384K Ext Clock
Modem Control: on on
Local Address: pm-1-w1.edmonds.cmc.net pm-1-w1.edmonds.cmc.net
Netmask: 255.255.255.252 255.255.255.252
Interface: frmW1 (FRM,Listen) (FRM,Quiet)
Mtu: 1500 0
Pkt Filters: In:w1.in Out:
Dial Group: 0
LMI Poll Int: 10 (seconds)
Old DLCI List: 18:206.102.31.186
Command>
(W1) LMI: Sending Full Status Enquiry - Sequence 60
Command>
Eventually the Livingston gives up and tries resetting the port:
sync_device_check (W1): Restarting Transmitter
Now, any ideas on what could cause this? It's ComOS 3.7 (as per the subject)
and it just seems that all input from the CSU stops completely until I manually
(or via a script) do a 'reset w1', which resolves the problem.
To give you an idea of how crappy this line is:
Command> vers
Livingston PortMaster PM-2e ComOS 3.7
System uptime is 19 minutes
Command> show w1
----------------------- Current Status - Port W1 ---------------------------
Status: ESTABLISHED
Input: 5918058 Abort Errors: 1
Output: 947666 CRC Errors: 3
Pending: 0 Overrun Errors: 0
TX Errors: 1 Frame Errors: 2
Modem Status: DCD+ CTS+
And immediately after typing that:
Command> show w1
----------------------- Current Status - Port W1 ---------------------------
Status: IDLE
Input: 6059125 Abort Errors: 5145
Output: 950775 CRC Errors: 4400
Pending: 0 Overrun Errors: 0
TX Errors: 1 Frame Errors: 2
Modem Status: DCD- CTS-
Yes, this is the demon spawn line from hell, and any suggestions anyone here
has about Mystery Telco Frame Cloud stuff would be useful.