No this is exactly what I was looking for. I can definitely understand the usefulness of having your routers transmit on a specific channel. Thanks!
2011/6/4 Brandon Applegate <[email protected]> > On Sat, 4 Jun 2011, Keegan Holley wrote: > > I'm struggling with a use for DWDM optics. I understand the concept of >> DWDM/CWDM and phase shifting to create more links over a single fiber. >> Once >> that is done the ASIC/FPGA bandwidth allocated to the port remains the >> same, >> correct? So if I create multiple 1G connections on a single port with >> these >> magic sfp's am I still limited by the 1g/2g chip in the device. Are all >> the >> logical connections forced to be sub-rate? I know the larger equipment >> handles this differently, so I'm only concerned with the 3750/3560 size >> boxes. >> >> > Hmm, I may be misunderstanding - but I think you are misunderstanding how > DWDM tuned optics works. A 1g or 10g DWDM optic is still a singe 1 or 10 > interface. It's just that that transmit laser is tuned to a channel (i.e. > 1546.12). > > Router#sh int tenGigabitEthernet 7/1 | inc media > Full-duplex, 10Gb/s, media type is DWDM-46.12 > > The reason you may need this is to connect this port directly to a (R)OADM. > There are (at least) two ways on the DWDM transport side to handle this: > > a) Use a *sponder (transponder = 1:1, muxponder = n:1, etc). You can use > 'grey' optics now (i.e. good ole SX/LX etc). These cards on the DWDM side > are expensive though. > > or > > b) Buy DWDM optics, and go directly into the mux/demux on the DWDM. > > We are doing option b) in parts of our network because the cost of a) was > too much, and these links aren't going to do any moving around or going away > any time soon. > > Again, apologies if I've misunderstood you. > > -- > Brandon Applegate - CCIE 10273 > PGP Key fingerprint: > 7407 DC86 AA7B A57F 62D1 A715 3C63 66A1 181E 6996 > "SH1-0151. This is the serial number, of our orbital gun." > > > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
