Single Arm Installation of LTM

want to install the LTM in a single arm mode do I still need to create both "internal-vlan" and "external-vlan"??? or I can create only one vlan that is "internal"when i say one-arm, i mean one vlan.

 

 

I have 8 ports on the LTM can I bundle all these ports into a single trunk and assign it to the internal and external VLAN together or in case if i can make only internal vlan then i assign this vlan to this single vlan.either will work. it depends on how many vlan you want.

 

 

Also is it a good idea to keep any of the ports free or I can put all of them in trunk. In case if i group all the ports in a single trunk how about the network fail-over will it work fine?or it may have some issue???for network failover, i prefer using dedicated port and connect it to peer unit directly (no intermediate device).