# License Server redundancy **URL:** \ **Category:** General\ **Created:** [April 4, 2016, 10:44am UTC](https://forums.chaos.com/t/license-server-redundancy/57881 "2016-04-04T10:44:49Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![KiboOst](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@KiboOst](https://forums.chaos.com/u/KiboOst)\ **Post date:** [April 4, 2016, 10:44am UTC](https://forums.chaos.com/t/license-server-redundancy/57881/1 "2016-04-04T10:44:49Z")
Hi, We are on a Windows domain network, with two Windows 2008R2 servers for AD/DNS redundancy. We actually have several license server softwares on one of the DCs, which put entire production down if it crash. This server have vrlservice with the usb dongle for VRay and PhoenixFD licenses. What could be done to make a failover between this server and another one ? I guess we could install vrlservice on another server, but it would need access to the usb dongle, right ? Then, we can set several IPs for clients to look for in case one crash. How do you deal with this ? ---
**Author:** ![KiboOst](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@KiboOst](https://forums.chaos.com/u/KiboOst)\ **Post date:** [April 4, 2016, 12:19pm UTC](https://forums.chaos.com/t/license-server-redundancy/57881/2 "2016-04-04T12:19:07Z")
Could such device share the dongle between the two servers ? > **[IOGEAR | KVM Switches, USB Hubs, Docking Stations](https://iogear.com/)** > > HDMI Switch, PC to TV, Wireless Audio Video, KVM Switch, KVM, USB Switch, Video Splitter, Video Switch, KVM DVI, LCD KVM, Rackmount KVM ---
**Author:** ![tashko.zashev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tashko.zashev/32/275280_2.png) [@tashko.zashev](https://forums.chaos.com/u/tashko.zashev)\ **Post date:** [April 14, 2016, 6:04am UTC](https://forums.chaos.com/t/license-server-redundancy/57881/3 "2016-04-14T06:04:23Z")
Hi, The Dongle must be physically moved to the backup server in order to continue serving licenses.