There two sites in our environment. One is a data-center (25 servers) and the other consists of about 300 users.
The link between these sites is a 100Mb OptiMAN fiber Ethernet connection. The link is connected via a 3750 switch (routed) interface on the data-center side and a 6513 switch (routed) interface on the user-site side.
There is a project underway that involves moving these servers from the data-center to the user-site. Both of these sites have different L2 VLANs and L3 VLANs.
In an effort to keep the servers from changing IP addresses(and subnets), I'm proposing that we remove the routed link and convert it to a Dot1Q trunk link. This would allow us to preserve the IP addresses of the servers when moving to the user-site.
Does anyone know of any drawbacks or problems with doing this? I'm going to contact the MAN provider and check with them as well.
Over the next few months, we plan on moving all of the servers from the data-center and eventually shutting down the site. So, this design is temporary.
As always, thanks for the help.