Sophos SG 115 Trunk (not LAG) Port Setup ?

Question

I recall an issue in years past with reliability of network issues when trying to do what i'm about to ask. im curious if it is still an issue, or if anyone has an extra Sophos on firmware 9.603-1 they can test this on? (I would if I did but I don't) 
 
 So all my interfaces are in use, but I need to implement VLANs at a site. 
 
 eth0 is my internal (type: ETHERNET) network. I would like to trunk it and also use eth0 for a number of (type: ETHERNET VLAN)s 
 
 Will this still be an issue nowadays? 
 
 thanks!

DKKDG · Accepted Answer

Hi jared, 
 if you want to implement vlans to your UTM just change your interface type to ethernet vlan and set the desired vlan tag. 
 The interface type ethernet is for your untagged vlan and interface type ethernet vlan for tagged vlans. 
 E.G. 
 eth0 -> type ethernet -> untagged eth0 -> type ethernet vlan -> tagged vlan 10 eth0 -> type ethernet vlan -> tagged vlan 20 
 Best Regards DKKDG

BAlfson · Answer

I haven't done it recently, so I may not be remembering correctly... I think you can now leave your current untagged Internal interface in place as is and then just define new VLAN interfaces on eth0. Of course, you will need a VLAN-capable switch. If that doesn't work, please come back and correct me! 
 Cheers - Bob