fiber ring topology

[narges3707]

Dear all

There are 20 nodes which want to connect to eachother in fiber optic ring topology

the issue is that service provider just with one pair core (only)

the issue is I dont is this possib le weith regualt cisco switch or I should use CWDM ??

please give me some hint about this project

[vmiller]

It sounds like your service provider is providing some form of metro-E solution or DWDM based solution.

What sort of configuration are they expecting at the handoff point ?

[narges3707]

you know , we only have a single 2 core fiber and we should connect 20 node to eachother as a ring topology, it means a fiber must enter the switch and exit from the same switch, is it possible for switch to  drop-and-insert fiber optic or not ?

[vmiller]

Its possible. It does sound like a DWDM solution. You should press your provider for more details.