Let me start by saying that I am primarily route/switch. My familiarity and knowledge of the ONS is very minimal. The enterprise I work for has a very large network where they have a mix of leased dark fiber where an SP provides the DWDM and a large metro ring where we provide the DWDM. I am having to come up to speed on the ONS quickly and with no previous background in optical other than basic knowledge. Kind of like drinking from a fire hose.
We have a DWDM ring with about 8 ONS 15454 in it. OSPF is currently enabled on the OSC channel in area 0. The decision has been made to enable OSPF on the LAN to allow our tools to monitor our DWDM better. As I understand it, a requirement for enabling OSPF on the LAN is that the OSC/GCC/DCC must be something other than area 0 and that the LAN area must be the same as the area ID of the neighboring router (the ONS can not be a traditional ABR).
My questions are the following:
Do we have to change the area ID of the OSC prior to enabling OSPF on the LAN?
What will happen if we enable OSPF on the LAN in say area 1 before we change the area ID of the OSC (documentation doesn't say that I've found)?
When we change the OSPF area on the OSC, will we encounter an outage on the optical ring? (Somewhere I read that OSPF is only used for the building of the circuits.)
