[nsp] kentrox hdlc

ringwyrm27 ringwyrm27 at comcast.net
Sun Feb 29 12:34:57 EST 2004

Put a hard loop on the network side of the CSU/DSU and see if the router
interface comes up looped.

You may need to temporarily change the clock/timing of the CSU/DSU to
internal/master.  Most CSU/DSU's (including Kentrox) default to internal if
there is no signal to recover clock from on the line.

If you come up looped, you know your good to the CSU/DSU.  Then work with
Telco and progressively move the loop towards the othe end of the circuit
until the loop fails.

----- Original Message ----- 
From: "Mikael Abrahamsson" <swmike at swm.pp.se>
To: "Gert Doering" <gert at greenie.muc.de>
Cc: <cisco-nsp at puck.nether.net>
Sent: Sunday, February 29, 2004 5:01 AM
Subject: Re: [nsp] kentrox hdlc

> On Sun, 29 Feb 2004, Gert Doering wrote:
> > Are you sure your layer 1 things are all setup correctly?  That is,
> > clocking is OK (one side is doing clocking), telco line is OK (you can
> > test that using the loops on the Kentrox iDSU), etc.?
> Yes, all of that is ok, link layer is error free.
> I get hdlc keepalives (or what looks like it, might be garbled as well) on
> the linux side from the cisco but the cisco doesnt get anything at all on
> its HSSI port (I tried "debug all", doesnt show anything coming in on the
> HSSI port).
> > > I have tried PPP and Cisco HDLC and standard HDLC. The above is the
> > > thing I can find that would stop this from working?
> >
> > I agree, this could be a reason, but it's "below" PPP/HDLC.
> Yes, I agree.
> -- 
> Mikael Abrahamsson    email: swmike at swm.pp.se
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