Before the virtualization era, it was recommended to have several network card on a physical server :
- 1 for production dedicated network (only application's stream like http, SQL*NET, ...)
- 1 for administration network (ssh, monitoring, ...)
- 1 for backup network (netbackup, ...)
These recommendations had security and ops advantages: network port for administration or backup purpose are not available on production facing network, dedicated bandwidth for backup that doesn't impact production bandwidth, ...
With virtualized servers and network are multiple network card/interface still recommended ?