> I am using 12.0(21)S3 with great success on 75xx 72xx and gsr > based routers. We're using 12.0(21)S3 with success on most of our 7500s, but we have one 7507 where a PA-E3 (on a VIP4-50) stopped working when we tried to to upgrade from 12.0(19)S2 to 12.0(21)S3. Had to revert to 12.0(19)S2. Steinar Haug, Nethelp consulting, sthaug@nethelp.no