12-07-2012 12:11 AM
Do i need a 25km longwave SFP for my ISL when using a DWDM between two sites separeted by 12 km ?
In my case :
d1 = 12 km
My question : Do i need a 25 km longwave SFPs in both FC switches or a 10 KM SFP is enough ?
12-07-2012 02:22 AM
I'm not sure, but I think that you can use 10km SFP transceivers for both FC Switches because distance between FC Switch and DWDM short, and distance between Local DWDM and Remote DWDM can extend upto 80km without an amplifier.
12-07-2012 03:18 AM
I have a customer with long distance ISL, using DWDM (multiplexers). The ISL ports are with shortwave SFPs. The pors on the multiplex are also sw. ISL ports are set as long distance (LD). The distance between both switches was measured (when setting the port to LD) as 42 km and it is working.
As long as you use DWDM device, what SFP you will need depend on the d2 and d3 distance.
12-14-2012 02:55 AM
as i see from your posted drawing, you are asking the d2 and d3. There is written it can be MM or SM.
So it depends on the distance d2 and d3 and the corresponding SFP's in the local and remote DWDM.
Defnetly you need a long distance license.