From: Micah Byers (micah@myvine.com)
Date: Fri Jul 25 2003 - 09:41:58 GMT-3
In my experience your best bet is to set the clocks to one side Internal and
the other side to Line/Network and if the CSU's sync at this point then
leave it as is, if not change them both to Line/Network (Internal to Line
should almost always work). Note that if you set both sides to Line/Network
you may see that T1 go down frequently or from time to time (depending on
the amount of data traversing the circuit typically), at this point the
CSU's aren't matching in their timing so you need to change one to Internal
(this is why Internal to Line is preferred as it guarantees time sync).
I've known many people to simply keep rebooting the CSU (or router if
integrated) when this happens, but it only fixes the problem temporarily.
-Micah-
----- Original Message -----
From: "Tim Fletcher" <tim@fletchmail.net>
To: "Charles Church" <cchurch@wamnet.com>; "Mike Williams"
<ccie2be@swbell.net>; "'Phil'" <ciscostudent1@yahoo.com.br>;
<ccielab@groupstudy.com>
Sent: Wednesday, July 23, 2003 10:04 PM
Subject: RE: Point-to-point T1 clock source
> I had a circuit from C&W that they insisted I would need to provide clock
on 1 side. But I could only get it to run clean if I took clock from the
network on both ends. I don't think they ever believed me.
>
> -Tim Fletcher
>
> At 09:43 PM 7/22/03 -0400, Charles Church wrote:
> >I guess it can vary between CLECs. Most of my experience has been with
> >Verizon in the northeast. Hasn't always been good experiences either ;)
> >
> >Chuck Church
> >CCIE #8776, MCNE, MCSE
> >Wam!Net Government Services
> >13665 Dulles Technology Dr. Ste 250
> >Herndon, VA 20171
> >Office: 703-480-2569
> >Cell: 703-819-3495
> >cchurch@wamnet.com
> >PGP key: http://pgp.mit.edu:11371/pks/lookup?search=chuck+church&op=index
> >
> >-----Original Message-----
> >From: Mike Williams [mailto:ccie2be@swbell.net]
> >Sent: Tuesday, July 22, 2003 9:37 PM
> >To: 'Charles Church'; 'Phil'; ccielab@groupstudy.com
> >Subject: RE: Point-to-point T1 clock source
> >
> >
> >All of the P2P T1s that we have, the provider provides the clock for
> >both ends, so we set the CSU/DSU to receive clocking from the network.
> >
> >Mike W.
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> >Charles Church
> >Sent: Tuesday, July 22, 2003 7:56 PM
> >To: Phil; ccielab@groupstudy.com
> >Subject: RE: Point-to-point T1 clock source
> >
> >
> >>From what I've seen, if you've gotten a full P2P T1 from a provider,
> >you'll provide the clock. If you've gotten a fractional P2P T1, usually
> >you'll provide it.
> >
> >Chuck Church
> >CCIE #8776, MCNE, MCSE
> >Wam!Net Government Services
> >13665 Dulles Technology Dr. Ste 250
> >Herndon, VA 20171
> >Office: 703-480-2569
> >Cell: 703-819-3495
> >cchurch@wamnet.com
> >PGP key:
> >http://pgp.mit.edu:11371/pks/lookup?search=chuck+church&op=index
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >Phil
> >Sent: Tuesday, July 22, 2003 8:43 PM
> >To: ccielab@groupstudy.com
> >Cc: ciscostudent1@yahoo.com.br
> >Subject: OT: Point-to-point T1 clock source
> >
> >
> >Sorry for the OT but I had a discussion this afternoon at work regarding
> >the clock source for a point-to-point T1.
> >
> >I am sure the clock must be provided by one of the CSU/DSU and the other
> >must be set to line/network. Everybody else argued both sides must be
> >set to line/network.
> >
> >I called into the Telco and they told me they do not supply clock for
> >point-to-point T1s, thus one of the ends must supply the clock.
> >
> >I was not able to find any docs on the web regarding this. Does anyone
> >have a link to a document for this matter?
> >
> >Thanks in advance and sorry for the OT,
> >
> >Phil
> >
> >
> >
> >---------------------------------
> >Yahoo! Mail
> >Mais espago, mais seguranga e gratuito: caixa postal de 6MB, antivmrus,
> >protegco contra spam.
> >
> >
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