Difficulty configuring a Sophos RED SD 20

Question

For testing, I put an XG 135 and a RED SD 20 on the same WAN network, I'm doing a test before putting it into production. So I have WAN XG = 192.168.1.167 (DHCP) and WAN RED = 192.168.1.104 (DHCP), I have already configured the RED interface on XG, but it is offline. 
 I also didn't see any reference in manuals and videos to a standard IP to access the RED console for the first time, with admin user for example. If I need to put a fixed IP on the RED WAN interface? 
 I have already put in production several Sophos UTM and XG, physical and virtual, but I never worked with RED, nor was I interested in learning even for VPN solution on clients, I prefer to put two XGs with IPSEC tunnel. 
 Well, if anyone can shed light on how to make RED work, would you appreciate it?

FormerMember · Accepted Answer

Hi IvanildoGalvão 
 Thank you for reaching out to the Community! 
 There is no user interface on the RED appliances; it is designed to be configured and managed from Sophos firewalls(XG/UTM). 
 I would suggest you review the technical training guide for more info: Sophos UTM: RED (Remote Ethernet Device) technical training guide . 
 Thanks,

FormerMember · Answer

Hi IvanildoGalvão 
 The RED device should not be on the same network as the firewall's WAN interface network. I would advise you to connect the RED device from a different network than your office network for testing. 
 Thanks,