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I have been looking at the page "Cisco Enhanced Wavelength Division Multiplexing Product Line", on Cisco's web site. I would like to light up some dark fibre for at least 2x 10Gbps Ethernet links. Looking at that page, can I use the eDWM box (EWDM-OADM4) on it's own to get 4x10Gbps links over a dark fibre pair, or do I need to have both boxes at both ends (EWDM-OADM4 & CWDM-MUX8A)?

Also, not having done this before; I have looked around and found tuned DWDM X2 optics such as 10GDWDM-X2-38.98=, (SFP+ devices also exist that are tuned to DWDM frequencies like this). Should these "just work" when connected directly into the eWDM mux above and a switch of my choosing (that supports the chosen transeciever type be it SPF+ or X2)? I assume the IOS will be ignorant of the SFP+/X2 being tuned, that is the point of them, and they will function like normal?

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closed as too localized by Tom O'Connor, Magellan, Ward, Scott Pack, John Gardeniers Nov 12 '12 at 6:00

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

You really need to ask Cisco on this. – Tom O'Connor Aug 24 '12 at 9:59
Dont know these products, but surely you need one per side. Cisco switches are aware of colored sfps. – 3molo Aug 24 '12 at 10:09
@3molo : They are aware ay? So does this mean they don't work on all switches then? – jwbensley Aug 24 '12 at 10:15
Yes, aware of a WDM SFP but not necessarily the wavelength of it. If it's cisco compatible it'll work on all nexus/catalyst switches I believe. – 3molo Aug 24 '12 at 19:21
up vote 1 down vote accepted

1.) Yes - you need an EWDM device on each side of the link. This is what separates out the frequency of light a given port is concerned with.

2.) The EWDM documentation has a list of compatible optics and part numbers. In -general- all you need to do is pop the optic into the router/switch, hook up a single mode patch and you're good to go, but the documentation for your equipment will explicitly list which optics are compatible. As a general rule issues are usually in much newer equipment - so a Catalyst 6500 pretty much supports everything while a Nexus 5000 might need a newer version of code for a particular optic.

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Yes I can confirm this is correct after speak with other individuals also. Everything should work just fine. I don't need the CWDM-MUX8A as per the exampe on the page, the EWDM-OADM4 would work fine on its own. Also using coloured optics directly into the mux is fine. Cheers! – jwbensley Aug 30 '12 at 18:07

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