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RED60 strange LAN flipping problems

Hi,

I have to add 14 RED60 devices for a customer

I have now configured 2 devices, and have exact the same problem on both devices.

After configuration it works fine, for about 2 minutes. After this time, I have a short down on LAN port (only 1 sec) there after I get an IP from the RED default network, not from the VLAN I should. If I unplug the device from LAN before the first downtime of the LAN port, I will get the right IP from the right VLAN ... It is very strange to me.

A few facts:

 RED60 device is connected to XG230

RED60 is connected to 1 WAN in DHCP mode (WAN is always up)

RED60 is in Standard/Split mode. IP of the RED is 192.168.162.1/24 we have DHCP on the RED from 50 to 200 Shared network is an internal network from XG

Switch mode is VLAN. LAN1 is Untagged, dropp tagged (Access Port) VLAN is 1

Port 2 is Untagged (Hybrid Port) VLAN 703 Port 3 is Untagged (Hybrid Port) VLAN 203 Port 4 is Disabled

VLAN 703 is 172.16.3.0/24 VLAN 203 is 192.168.203.0/24 with DHCP from 50 to 200

PoE is disabled on LAN1 and LAN3

I have also tested to set LAN Port 2 and 3 to Untagged, drop tagged (Access Port) same problem.

I have changed the Network adapter in test client, and I have tested with 2 different RED60 devices.

At the moment we have no route to internet set from the VLANs on XG, but I think this should not be the problem for this strange effect.

Has someone a solution for my problem, or did I everything wrong with the RED60? 

I am very new with Sophos, worked with many other products in the past. So perhaps I did something wrong in configuration.

Thank you for helping  

Jan



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