Option 1 should work and is the easiest way to get everything you want.
Option 2 will crash because the Roamio and Bolt will both try to bridge between MoCA and Ethernet. There can only be one bridge.
Since you want to keep tivo traffic confined to the MoCA network, option 1 is best.
Another option is to set up the Bolt as the MoCA bridge and configure the Roamio to connect through MoCA only (just unplug the ethernet cable). This would be an advantage if you have any other MoCA 2.0 devices, if your internet feed is more than about 150Mbps. If the Bolt is the only MoCA 2.0 device, it won't make any difference.
If you *really* want to confine all of your TiVo traffic to the MoCA network, you could get a WCB3000N MoCA adapter and plug your Series 3 HD into that.
Option 2 will crash because the Roamio and Bolt will both try to bridge between MoCA and Ethernet. There can only be one bridge.
Since you want to keep tivo traffic confined to the MoCA network, option 1 is best.
Another option is to set up the Bolt as the MoCA bridge and configure the Roamio to connect through MoCA only (just unplug the ethernet cable). This would be an advantage if you have any other MoCA 2.0 devices, if your internet feed is more than about 150Mbps. If the Bolt is the only MoCA 2.0 device, it won't make any difference.
If you *really* want to confine all of your TiVo traffic to the MoCA network, you could get a WCB3000N MoCA adapter and plug your Series 3 HD into that.