Theodore,
MDT or MSDP? I would personally say that MDT makes it easier as it allows to use SSM for both the default and data MDT, which alleviates the need to set up RPs, MSDPs across these different networks.
Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México