[162947] in North American Network Operators' Group
RE: Entry level WDM gear?
daemon@ATHENA.MIT.EDU (David Wilde)
Thu May 9 20:10:51 2013
From: David Wilde <David.Wilde@aarnet.edu.au>
To: "nanog@nanog.org" <nanog@nanog.org>, Jeff Kell <jeff-kell@utc.edu>
Date: Fri, 10 May 2013 00:10:31 +0000
In-Reply-To: <518B1637.20002@utc.edu>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi Jeff,
Cisco make a passive CWDM/EWDM solution for this.
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6575/product_da=
ta_sheet0900aecd8029d01b_ps708_Products_Data_Sheet.html
You need to order a CWDM-MUX8A=3D for each end, plus the CWDM-CHASSIS-2=3D =
to rack-mount them.
Then, plug your dark fibre into the trunk port of each mux, and use pairs o=
f coloured optics instead of your ER.
The muxes carry 8xlambdas: 1470, 1490, 1510, 1530, 1550, 1570, 1590, and 16=
10. I don't believe Cisco make CWDM 10G optics however, so you may have to=
get compatible optics.
For 8 additional wavelengths, you could also insert an EWDM mux into the pa=
th at each end:
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_data_shee=
t0900aecd806a1c36.html
ie. a EWDM-MUX8=3D for each end - it fits into the same rack-mount chassis.
This allows you to carry 8 more channels, at DWDM spacings: 1538.98, 1539.7=
7 etc. Cisco do make 10G optics at these wavelengths; X2, Xenpak etc.
Having both types of mux in the path can add a fair bit of loss though, and=
there's an optional amplifier unit which can be plugged into the EWDM muxe=
s: EWDM-OA=3D. =20
Regards,
David
> -----Original Message-----
> From: Jeff Kell [mailto:jeff-kell@utc.edu]
> Sent: Thursday, 9 May 2013 1:21 PM
> To: nanog@nanog.org
> Subject: Entry level WDM gear?
>=20
> Apologies if this is a "dumb newbie" question, but this is one area of
> networking where I remain a virgin :)
>=20
> We have a local loop fiber to a regional fiber hut that has served us wel=
l for
> several years. It's carrying a 1550nm ER 10G circuit at the moment, but =
we're
> looking at another one, possibly two (or more) in the near future. Getti=
ng
> another dark pair is "complicated" so we're exploring options to [C|D]WDM
> multiple lambdas over the existing fiber.
>=20
> Ciena/Cyan/etc are way over our non-existant budget... what is the going
> recommendation to throw say 4-8 lambdas over a dark pair without breaking
> the bank? :)
>=20
> Jeff
>=20
