[167486] in North American Network Operators' Group
Re: CWDM question
daemon@ATHENA.MIT.EDU (Jared Mauch)
Thu Dec 12 20:15:52 2013
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <52AA5EC5.9090109@citywest.ca>
Date: Thu, 12 Dec 2013 20:15:40 -0500
To: Keith <kwoody@citywest.ca>
Cc: North American Network Operators' Group <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Dec 12, 2013, at 8:11 PM, Keith <kwoody@citywest.ca> wrote:
> Hi.
>=20
> We are doing a fiber link between us and another SP using CWDM.
>=20
> There is traffic flowing just fine at the 1310 wave, and have recently =
added a
> 1471 wave.
>=20
> On the 1471 wave there are some problems with it. =46rom our =
perspective, and we
> have packet captured this, we are transmitting data to them, but they =
say they
> are not seeing anything. We are receiving from them, and while we show =
that
> packets are leaving our interface to them, they are getting nothing at =
all.
>=20
> There are good light levels between the two locations and do not =
understand
> why they are not seeing traffic from us even though we are sending it. =
Our packet
> counters show we are transmitting to them and receiving from them.
>=20
> Is it possible to have RX and TX light and things appear to be ok, but =
have the
> RX on their side fubar in some way that it is not operating correctly =
in that our
> traffic is not reaching them?
Are you using fixed optics or tunables? Are transponders involved for =
the CWDM side then you have =93client optics=94 at 850nm or 1310? Is =
there a filter involved? Do you have a light meter? What do the optics =
show for the various light levels and frequencies involved?
- Jared=
