turning on EIGRP

[garyrivers]

i'm hoping that i haven't screwed up but here goes.  i replaced an HP L2 switch with a L3 3650 as a core switch.  when i installed the SW i didn't enable routing in an effort to not disturb too much.  but now i would like to move some routing lines from our router to the new switch to reduce some hops.

So my question/s is: what should i expect my switch to do when i enable EIGRP?

will it stop processing traffic until it learns the new routes?  and if so, how long?

Or will i see anything at all?

i'm attaching a quick layout of my network as a reference.

Gary

[garyrivers]

Jon,

can we attack this from another route?

Please refer the attached .png file.....

what if i were to start phasing out the RTR by moving the LANs attached to the RTR and the ASA that connects to the RTR?

And my thoughts are to enable routing on the SW27, gradually move the LANS off of the RTR and ASA.  Then in a one-two punch, shutdown the RTR and re-IP the SW to .254 (the default gateway IP).

But i guess the question still remains, what will happen when i enable EIGRP on SW27?

Thoughts?