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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

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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

1 Answer 1

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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