migration tools

know any tools, not methods, tools, to
  o migrate a network from one igp to another (e.g. ospf to is-is),
  o merge two networks which have common igp but are currently ebgp,
  o ...

think mergers and acquisitions (no i am not gonna do it again:)



Is there any one with an idea of an open source packeteer or bandwidth
solution like Allot NetEnforcer Bandwidth Management.
We currently have Microsoft TMG 2010 with GFI Web monitor 2009 installed on
it, we are looking for a solution possible from open source.Which can
replace it.


I actually want it as a proxy server and use it to shape, allocate and
restrict access to certain websites of our staff.

Well thanx i wish i could get a full blown solution