问题：

[多选] When designing the IP routing for the Enterprise Campus network， which of these following twoiBGB considerations should be taken into account？（）

A .  iBGB dual horning with different iSPs puts the Enterprise at the risk of becoming a transitnetwork
B .  iBGP requires a full mesh of eBGP peers
C .  Routers will not advertise iBGP learned routers to other iBGP peers.
D .  The use of route reflections or Confederation eliminate any full mesh requirement while helpingto scale iBGP
E .  iGBP peers do not add any information to the AS path