There are many factors that go into this type of decision. You need to look at the services being offered today as well as those theyd like to offer 3-5 years from now. Often a network might consist of several technologies where the particular service of that route dictates the need for one over another.
The use of one doesn't necessarily rule out the concurrent use of the other (or any of the others).
DWDM is neutral as to the type of signalling that it can carry; it's just a way of increasing the apparent bandwidth over a given pair of SM fiber. In a high-density metro area, it's likely to be far cheaper to deploy WDM / DWDM than to pull additional media. For an existing plant, the bandwidth multiplication frequently translates to more efficiency and lower per-unit transmission costs for a given span.
In a large campus environment, using DWDM to "multiply the bandwidth" is usually a faster solution to implement than trenching-in new media or pulling more fiber into the existing raceways.
WDM / DWDM is just a way to "fatten up" the fiber.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...