Hi Team,   we have router with series 2900 and need to replace with 4300 series. In order to replace voice module, we have an issue that MOdule VIC2-4FXO of router 2900 series is not compatible with cisco 4300 series and we have ordered PVDM4 which i...

Hi Team,   we have a cisco 6509 core switch and need to upgrade with eFSU. according to cisco TAC we can not use eFSU as we are going to perform up gradation from Modular IOS to Native IOS.   Please explain me the difference between Native IOS and Mo...