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OK ... so I've never laid a finger on an IAD2400, but I cheated and
looked at an old email from a knowledgeable source, and here's what
he says (for the case where the IAD2400 is taking clock from one T1
and providing to another):<br>
<br>
<pre><blockquote type="cite"><pre style="margin: 0em;">network-clock base-rate [56k | 64k ] as appropriate
network-clock-select 1 T1 [0 | 1 ] as appropriate
clock source line on the appropriate controller
clock source internal on the other controller
If the peer devices are providing clocking and accepting clocking as you've set
on the IAD, then you should get no slips.</pre></blockquote>
</pre>
<font face="Arial">Does this help?<br>
<br>
Aaron<br>
</font><br>
<hr size="2" width="100%"><br>
<div class="moz-cite-prefix">On 10/10/2012 12:57 PM, <a class="moz-txt-link-abbreviated" href="mailto:mays@win.net">mays@win.net</a>
(Joseph Mays) wrote:<br>
</div>
<blockquote
cite="mid:9E29681ADC6E44F8B180D4BDF310CE58@win2snvu0x4eg9"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<meta name="GENERATOR" content="MSHTML 8.00.6001.19328">
<div><font face="Arial" size="2">I have noticed something that I
have not noticed prior to this, which is that all the units
that are experiencing slips are IAD2400's All are set to get
clocking from the line, but does the IAD2400 behave
differently with regard to clocking than most things somehow?</font></div>
<blockquote style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT:
5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">----- Original Message ----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color:
black"><b>From:</b> <a moz-do-not-send="true"
title="Aaron@cisco.com" href="mailto:Aaron@cisco.com">Aaron
Leonard</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a
moz-do-not-send="true" title="mays@win.net"
href="mailto:mays@win.net">Joseph Mays</a> </div>
<div style="FONT: 10pt arial"><b>Cc:</b> <a
moz-do-not-send="true" title="cisco-nas@puck.nether.net"
href="mailto:cisco-nas@puck.nether.net">cisco-nas@puck.nether.net</a>
</div>
<div style="FONT: 10pt arial"><b>Sent:</b> Wednesday, October
10, 2012 3:30 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re: [cisco-nas]
Slips</div>
<div><br>
</div>
The pri-group config is weird, but I would not think it's
relevant.<br>
<br>
My theory continues to be, until disproven, that the device that
is on the far side of the slipping span is not configured right.<br>
<br>
<hr size="2" width="100%"> <br>
<div class="moz-cite-prefix">On 10/10/2012 12:21 PM, <a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:mays@win.net">mays@win.net</a> (Joseph Mays)
wrote:<br>
</div>
<blockquote
cite="mid:2B2EF52535744F038D0B661D228673E7@win2snvu0x4eg9"
type="cite">
<meta name="GENERATOR" content="MSHTML 8.00.6001.19328">
<div><font face="Arial" size="2">Yeah. The DACS is not the
problem though, because we have two circuits going through
the DACS, in fact they are two circuits that are exactly
the same, following the same path from our AS5400 through
the telco to the same router (an IAD2400) at the same
customer, one is getting slips one is not. Both go through
the DACS. The only difference between them is that one has
just a channel group for T1 service and the other has both
a channel group and a PRI group. The one with just the
channel group is plugged into the native T1 port on the
IAD2400. The one with both is plugged into a card that
will support multilple tdm groups on a card.</font></div>
<div> </div>
<div><font face="Arial" size="2">On the AS5400....</font></div>
<div> </div>
<div><font face="Courier New" size="2">controller T1 1/0:22<br>
framing esf<br>
channel-group 0 timeslots 1-22 speed 64<br>
description Glass Doctor combo PRI and T1 1<br>
!<br>
controller T1 1/0:23<br>
framing esf<br>
channel-group 0 timeslots 1-22 speed 64<br>
pri-group timeslots 23-24<br>
description Glass Doctor combo PRI and T1 2<br>
</font></div>
<div><font face="Arial" size="2">The second one, on 1/0:23,
gets slips about once every 10 seconds.</font></div>
<div> </div>
<blockquote style="BORDER-LEFT: #000000 2px solid;
PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px;
MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">----- Original Message ----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4;
font-color: black"><b>From:</b> <a
title="Aaron@cisco.com" href="mailto:Aaron@cisco.com"
moz-do-not-send="true">Aaron Leonard</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a
title="jfmays@launchpad.win.net"
href="mailto:jfmays@launchpad.win.net"
moz-do-not-send="true">Joe Mays</a> </div>
<div style="FONT: 10pt arial"><b>Cc:</b> <a
title="cisco-nas@puck.nether.net"
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true">cisco-nas@puck.nether.net</a> </div>
<div style="FONT: 10pt arial"><b>Sent:</b> Wednesday,
October 10, 2012 2:09 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re:
[cisco-nas] Slips</div>
<div><br>
</div>
I suppose it is possible that a DACS could introduce enough
jitter into the signal to keep the other system from
deriving clock from the line. This is not a problem in the
general case though.<br>
<br>
<hr size="2" width="100%"> <br>
<div class="moz-cite-prefix">On 10/9/2012 9:31 PM, <a
class="moz-txt-link-abbreviated"
href="mailto:jfmays@launchpad.win.net"
moz-do-not-send="true">jfmays@launchpad.win.net</a> (Joe
Mays) wrote:<br>
</div>
<blockquote
cite="mid:1630FE1D0F6F45DE949F0A783E09B10F@mainbay"
type="cite">
<meta name="GENERATOR" content="MSHTML 8.00.6001.19328">
<div><font face="Arial" size="2">
<div><font face="Arial" size="2">It has been suggested
that if those circuits go through a DAX, the
clocking signal may not be making it to the other
system.</font></div>
</font></div>
<blockquote style="BORDER-LEFT: #000000 2px solid;
PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px;
MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">----- Original Message
----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4;
font-color: black"><b>From:</b> <a
title="Aaron@cisco.com"
href="mailto:Aaron@cisco.com" moz-do-not-send="true">Aaron
Leonard</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a
title="mays@win.net" href="mailto:mays@win.net"
moz-do-not-send="true">Joseph Mays</a> </div>
<div style="FONT: 10pt arial"><b>Cc:</b> <a
title="cisco-nas@puck.nether.net"
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true">cisco-nas@puck.nether.net</a>
</div>
<div style="FONT: 10pt arial"><b>Sent:</b> Tuesday,
October 09, 2012 7:00 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re:
[cisco-nas] Slips</div>
<div><br>
</div>
The 5400 has only one clocking domain. So, if you are
getting clock from slot 6 port 0, then this is the time
source for the whole TDM bus. So, all other T1s on the
5400 will be synchronized to that source, and anything
that takes clock from those T1s should be synchronized.<br>
<br>
<a class="moz-txt-link-freetext"
href="http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a008014f8a6.shtml"
moz-do-not-send="true">http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a008014f8a6.shtml</a><br>
<br>
That's why I suspect that the system on the other side
of T1 6/1 is not actually taking clock from the line.
Maybe it's free running or maybe it's taking clock from
something else.<br>
<br>
Aaron<br>
<br>
<hr size="2" width="100%"> <br>
<div class="moz-cite-prefix">On 10/9/2012 2:46 PM, <a
class="moz-txt-link-abbreviated"
href="mailto:mays@win.net" moz-do-not-send="true">mays@win.net</a>
(Joseph Mays) wrote:<br>
</div>
<blockquote
cite="mid:4CEC500DF8EF4B37AC042E19C178B9B6@win2snvu0x4eg9"
type="cite">
<meta name="GENERATOR" content="MSHTML
8.00.6001.19328">
<style></style>
<div><font face="Arial" size="2">I would like to
change port 6/1 to clocking internal, but I can't
find any way change the clocking on an individual
t1 port controller to internal. Am I missing
something?</font></div>
<blockquote style="BORDER-LEFT: #000000 2px solid;
PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT:
5px; MARGIN-RIGHT: 0px">
<div style="FONT: 10pt arial">----- Original Message
----- </div>
<div style="FONT: 10pt arial; BACKGROUND: #e4e4e4;
font-color: black"><b>From:</b> <a
title="mays@win.net" href="mailto:mays@win.net"
moz-do-not-send="true">Joseph Mays</a> </div>
<div style="FONT: 10pt arial"><b>To:</b> <a
title="Aaron@cisco.com"
href="mailto:Aaron@cisco.com"
moz-do-not-send="true">Aaron Leonard</a> </div>
<div style="FONT: 10pt arial"><b>Cc:</b> <a
title="cisco-nas@puck.nether.net"
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true">cisco-nas@puck.nether.net</a>
</div>
<div style="FONT: 10pt arial"><b>Sent:</b> Tuesday,
October 09, 2012 4:48 PM</div>
<div style="FONT: 10pt arial"><b>Subject:</b> Re:
[cisco-nas] Slips</div>
<div><br>
</div>
<div><font face="Arial" size="2">Thank you for your
response.</font></div>
<div> </div>
<div><font face="Arial" size="2">Show tdm clocks
shows the AS5400 is using the circuit in port
6/0 for primary clocking.</font></div>
<div> </div>
<div><font face="Courier New" size="2">Primary
Clock:<br>
--------------<br>
System primary is slot 6 port 0 of priority 1<br>
TDM Bus Master Clock Generator State = NORMAL</font></div>
<div> </div>
<div><font face="Courier New" size="2">Backup clocks
for primary:<br>
Source Slot Port DS3-Port Priority
Status State<br>
-------------------------------------------------------------<br>
Trunk 1 1 YES 2
Good Configured<br>
Trunk 1 2 YES 3
Good Configured<br>
Trunk 1 3 YES 4
Good Configured<br>
Trunk 1 4 YES 5
Good Configured<br>
Trunk 1 5 YES 6
Good Configured<br>
Trunk 6 1 NO 213
Good Default<br>
Trunk 1 28 YES 202
Good Default<br>
Trunk 1 27 YES 203
Good Default</font></div>
<div> </div>
<div><font face="Courier New" size="2">Trunk cards
controllers clock health information<br>
------------------------------------------------<br>
CT3 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1
1 1 1 1<br>
Slot Port Type 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4
3 2 1 0 9 8 7 6 5 4 3 2 1<br>
1 0 T3 G G G B B G G B B G B G B B B
B B B B B B B B G G G G G</font></div>
<div> </div>
<div><font face="Arial" size="2">We had considered
the possibility that the problem might be coming
from the mux that everything was passing
through. I rewired the pinouts from telco in
order to connect them directly to a t1 port on
the AS5400 (Controller 6/1), rather than passing
them through the mux and coming across a channel
on the t3. It works, but the slips are exactly
the same.</font></div>
<div> </div>
<div><font face="Arial" size="2">ArmoryPl-AS5400#show
controller t1 6/1<br>
T1 6/1 is up.<br>
Applique type is Channelized T1<br>
Cablelength is long gain36 0db<br>
Description: Leonard Brush MUX Bypass<br>
No alarms detected.<br>
alarm-trigger is not set<br>
Version info of slot 6: HW: 768, PLD Rev: 1<br>
Framer Version: 0x8</font></div>
<div> </div>
<div><font face="Arial" size="2">Manufacture Cookie
Info:<br>
EEPROM Type 0x0001, EEPROM Version 0x01, Board
ID 0x02,<br>
Board Hardware Version 3.0, Item Number
73-3996-03,<br>
Board Revision A0, Serial Number JAB044106K3,<br>
PLD/ISP Version <unset>, Manufacture
Date 11-Oct-2000.</font></div>
<div> </div>
<div><font face="Arial" size="2"> Framing is ESF,
Line Code is B8ZS, Clock Source is Line.<br>
Data in current interval (638 seconds
elapsed):<br>
0 Line Code Violations, 0 Path Code
Violations<br>
54 Slip Secs, 0 Fr Loss Secs, 0 Line Err
Secs, 0 Degraded Mins<br>
54 Errored Secs, 0 Bursty Err Secs, 0
Severely Err Secs, 0 Unavail Secs<br>
</font></div>
<div><font face="Arial" size="2">Right next to it is
the trunking circut plugged into 6/0, it runs
fine, no slips. I would like to change 6/1 to
internal clocking, btw, so that it should be
following the clock that is being derived on
6/0, but can't find anyway to change that on the
t1 ports. So as it stands right now, both 6/1
and the customer router on the other end of that
t1 are set to clock-source line, with no mux
between them. And getting slips.</font></div>
<div> </div>
<div> </div>
<div><font face="Arial" size="2">----- Original
Message ----- </font>
<div><font face="Arial" size="2">From: "Aaron
Leonard" <</font><a
href="mailto:Aaron@cisco.com"
moz-do-not-send="true"><font face="Arial"
size="2">Aaron@cisco.com</font></a><font
face="Arial" size="2">></font></div>
<div><font face="Arial" size="2">To: "Joseph Mays"
<</font><a
href="mailto:jfmays@launchpad.win.net"
moz-do-not-send="true"><font face="Arial"
size="2">jfmays@launchpad.win.net</font></a><font
face="Arial" size="2">></font></div>
<div><font face="Arial" size="2">Cc: <</font><a
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true"><font face="Arial"
size="2">cisco-nas@puck.nether.net</font></a><font
face="Arial" size="2">></font></div>
<div><font face="Arial" size="2">Sent: Tuesday,
October 09, 2012 3:21 PM</font></div>
<div><font face="Arial" size="2">Subject: Re:
[cisco-nas] Slips</font></div>
</div>
<div><font face="Arial"><br>
</font></div>
<font face="Arial" size="2">> Joe,<br>
> <br>
> Sounds like, conceptually, you've set things
up right. I would <br>
> doublecheck on the customer routers to make
sure that they really are <br>
> taking clock from the right T1 line.<br>
> <br>
> On the 5400, you should be using "tdm clock
priority" to set the clock <br>
> source, and "show tdm clocks" to validate the
clocking. <br>
> </font><a
href="http://www.cisco.com/en/US/docs/ios/12_3/dial/command/reference/dia_s6g.html#wp1140246"
moz-do-not-send="true"><font face="Arial" size="2">http://www.cisco.com/en/US/docs/ios/12_3/dial/command/reference/dia_s6g.html#wp1140246</font></a><br>
<font face="Arial" size="2">> <br>
> Aaron<br>
> <br>
> ----<br>
> <br>
> On 10/9/2012 8:43 AM, </font><a
href="mailto:jfmays@launchpad.win.net"
moz-do-not-send="true"><font face="Arial" size="2">jfmays@launchpad.win.net</font></a><font
face="Arial" size="2"> (Joseph Mays) wrote:<br>
>> It occurs to me that there is an
assumption built into this that is<br>
>> unproven. Does setting the AS5400 to
internal clocking on the T3 cause it to<br>
>> provide clocking for the T1's on the T3?
We have assumed that it does. If<br>
>> not, how do we tell it to provide an
outgoing clock signal for the T1's on<br>
>> the T3?<br>
>><br>
>> ----- Original Message -----<br>
>> From: "Joe Mays" <</font><a
href="mailto:mays@win.net" moz-do-not-send="true"><font
face="Arial" size="2">mays@win.net</font></a><font
face="Arial" size="2">><br>
>> To: "cisco-nsp" <</font><a
href="mailto:cisco-nsp@puck.nether.net"
moz-do-not-send="true"><font face="Arial" size="2">cisco-nsp@puck.nether.net</font></a><font
face="Arial" size="2">>; <</font><a
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true"><font face="Arial" size="2">cisco-nas@puck.nether.net</font></a><font
face="Arial" size="2">><br>
>> Sent: Tuesday, October 09, 2012 12:57 AM<br>
>> Subject: [cisco-nas] Slips<br>
>><br>
>><br>
>>> We have an AS5400 that we are using
to provide PRI's to customers. It has<br>
>>> the following circuits coming into it
from the Telco (AT&T).<br>
>>><br>
>>> 5 Trunking circuits that come across
T1 ties into a t3 mux, and then are<br>
>>> then delivered to a T3 port on the
AS5400. ! trunking circuit that is<br>
>>> connected into a T1 card on the
AS5400. Several circuits to customers that<br>
>>> are delivered out of the T3 through
the mux to T1 tie pairs through AT&T,<br>
>>> and some of which go through HDSL
T1's that we provide.<br>
>>><br>
>>> We have clocking set up thusly. The
T1 port that has the trunk line in it<br>
>>> (Serial6/0) is set to clock source
line, to get clocking from AT&T.<br>
>>> The TDM clock priority on AS5400 is
set to Serial6/0.<br>
>>> The T3 that has all the other T1's is
set to clock source internal, on the<br>
>>> assumption that the internal clock on
the AS5400 should now be<br>
>>> synchronizing to the trunk line
coming in on 6/0. So all the T1 channels<br>
>>> on the T3 should be following the
Cisco clock.<br>
>>> The mux is set to clocking is set on
the t3 to clock source line, to get<br>
>>> clocking from the T3 coming from the
AS5400.<br>
>>> The customers at the end are all set
to clock source line.<br>
>>><br>
>>> None of the trunks is having slips,
but several of the AT&T customers are<br>
>>> showing a slip every 10 seconds or
so. The clocking chain we have set up<br>
>>> seems logical to me. Is there
something I'm missing? Why would the<br>
>>> customers be having slips.<br>
>>><br>
>>> We asked AT&T to monitor one of
the lines that we are seeing slips on.<br>
>>> They watched it for a bit and said no
slips are occurring, though I am<br>
>>> seeing them both on the AS5400 and on
the Customer router. They are<br>
>>> performing a more indepth test now.<br>
>>><br>
>>><br>
>>>
_______________________________________________<br>
>>> cisco-nas mailing list<br>
>>> </font><a
href="mailto:cisco-nas@puck.nether.net"
moz-do-not-send="true"><font face="Arial" size="2">cisco-nas@puck.nether.net</font></a><br>
<font face="Arial" size="2">>>> </font><a
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moz-do-not-send="true"><font face="Arial" size="2">https://puck.nether.net/mailman/listinfo/cisco-nas</font></a><br>
<font face="Arial" size="2">>><br>
>>
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