Fortigates incompatibility with Telenet DOCSIS 3.1 E-ROUTER

[duetgroup_tech]

Hello all.

If you are using a Fortigate with the Belgian Cable ISP Telenet, you should know that there is a known incompatibility between Fortigates and the new Telenet DOCSIS 3.1 E-ROUTER. This is the kind of router that they install for all new clients. For now, it is possible to request Telenet to install a DOCSIS 3.0 modem and that solves the issue, but going forward this could become a big problem, especially if they require all their clients to switch to DOCSIS3.1.

The problem seems to be that Fortigates don't support Unicast DHCP. 

As far as I can tell the incompatibility is known to Telenet, but I don't know if Fortinet knows or not. I have opened a TAC case to find out.

[avka1453]

Hi,

sure, you go to the system menu and in the submenu Firmware, you can see the current version

KR,

[waterboy1602]

I'm sorry, but this is not possible in the Telenet overview (mijn.telenet.be). As a Telenet customer we can't access the modem directly.

[avka1453]

Hi,

I'm sorry, I wanted to know which version of Fortigate firmware you are running :)

KR,

[waterboy1602]

I'm sorry for the misunderstanding. My Fortigate firewall is on firmware version: FortiOS v6.0.6 build0272 (GA).