I currently am supporting a 3845 running 12.2.24.T on one side of an MPLS circuit and then a 3825 running 12.4.23 Mainline on the other end of the circuit.
I was reading the Q & A section about release 15 M and T. Is there any reason (other than hardware resources) why I would not go ahead and move to release 15.
Also I noticed in the Software download section that there were 3 different releases available for the 3845 for version 15. they were 15.0.1M1(ED), 15.0.01-XA1(ED), 15.1.1-XB(ED).
I do not understand the transtion from M1 to XA1 to XB. Can this be explained?
Thanks for any input
your routers have current IOS releases.
Unless there is a new feature that you need present only on 15 IOS I would stay with 12.4T for a while.
About the different versions: well it is not a new story.
However, for examples release notes for 15XB are here:
this release supports a new routing paradigm called LISP
Locator/ID Separation Protocol (LISP) is a next-generation routing feature. LISP can be used for any multi-homing environments while reducing operational complexities.
This is just an example I think you can focus on mainline 15.01M for normal uses. These other images have specific uses.
Hope to help