Got it. This help a lot. Thanks.Marlon On Tue, Feb 10, 2009 at 2:36 PM, Mikael Abrahamsson <[email protected]>wrote:
> On Tue, 10 Feb 2009, Marlon Duksa wrote: > > Hi - can anyone explain difference between 'tunable optics' and DWDM >> capable cards on Cisco routers (7600, 12K and CRS), or is this the same? >> > > Yes, that is the same. > > Also, can in essence a 4-10GE-ITU/C (4x10G C-band DWDM PLIM on CRS) do >> the >> same thing as SPA-1x10GE-L-ITUC (1x10G C-Band spa) on 12K (port capacity >> put >> aside)? >> > > It's my understanding that they can. > > Does this mean that I can have a single physical port (on a DWDM enabled >> 7600/12K/CRS cards/PLIMs) carrying traffic at various speeds over >> different wavelengths(BW totaling 10G for example for a 10G physical >> port)? >> For example, I can create one channel with oc-12 speed over one >> wavelength, >> another channel with oc-48 speed on another channel and then bind those >> channels to a sub-interface? Is this how this is done? >> > > No, it's single wavelength at any given time, and it's 10G only, and it's > single point to point link over that single DWDM wave. You can of course > have multiple ports in your router and thus achieve multiple waves, but each > port only outputs single wave. > > With IPoDWDM optical integration they talk about eliminating >> transponders, >> but I'm not sure what those transponders would do anyway, before they drop >> traffic to an (RO)ADM? >> > > A DWDM transponder converts your 1310nm light into C-band single wavelength > light and might add Forward Error Correction (FEC), plus supplies the people > who run the DWDM with an administrative interface to monitor, both the DWDM > side and the local tributary side. > > With the above router linecards you basically put the transponder into the > router so the router outputs the C-band light and does FEC, and then you put > this light via a variable attenuator into the DWDM system without any > further Optical-Electrical-Optical conversion. > > -- > Mikael Abrahamsson email: [email protected] > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
