I am configuring an EX2300 to replace an old EX2200 but there doesn't seem to be ethernet-switching-options on the new platform. Any idea what I need to do to configure?
The 2300 is based on the newer Enhanced layer2 Services.
some of the options are found under either switch-options (for such as voip configuration) or under l2-learning, for some of the RSTP BDPU settings and such,
As Matt mentions, layer 2 configuration had a major change with ELS (enhanced layer 2 services). This is essentially MX format layer 2 now on the EX platforms.
There is a tool to translate your EX commands to ELS here