Hot!Fortilink (switch - fortigate) over media converter not working ...

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Tezro
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2021/01/14 03:12:57 (permalink)
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Fortilink (switch - fortigate) over media converter not working ...

Hello,
 
The issue is: why Fortilink cannot be established over a media converter ?
What are the limitations ...? Vendors of ""proper"" media-converters ???
I thought that media converter is only a dump converter: from electric signals to optical -so it does not introduce anything in the traffic -> ergo it completely transparent and FolrtiLink shoul (!) works
 
What about config like this
Of course :
-FG is configured for FortLink on the port that is connected to the media-converter
-SFP are proper for the fiber : SFP SM for SM fiber type
-Link on BOTH sides are UP and blinking...
[F-Gate UTP] <--Cat 5e copper --> [ UTP  MediaConverter  SFP] <--Fiber --> [SFP  FortiSwitch]
 
any magic command from CLI (again...!) on Fgate or Fswitch ?????
 
UPDATE:
the SAME Fortinet SFP module plugged from switch to Fluke Analyzer and connected via media-converter to normal  (non-fortilink) port in FGate  works from the first kick ...
 
WTH ?!?!?!?
 
THA
 
Tezro
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5 Replies Related Threads

    bmduncan34
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    Re: Fortilink (switch - fortigate) over media converter not working ... 2021/01/14 07:39:42 (permalink)
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    Why can't you just do all fibre or all copper between the gate and the switch?
    #2
    Tezro
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    Re: Fortilink (switch - fortigate) over media converter not working ... 2021/01/14 09:14:35 (permalink)
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    I'd love to, really! but ....
    I have a couple of installations where FG-80x is to big (mostly 50x 60x) ... and this is a lowest model with SFP additionally pre-configured as WAN.
    I know, I can change this to different port but still
    Fortilink over third party devices (switches, wifi-bridges) is not straight-forward solution
     
    #3
    brycemd
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    Re: Fortilink (switch - fortigate) over media converter not working ... 2021/01/14 12:02:26 (permalink)
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    So, the connection in general works as a normal interface, but it's not activating fortilink?
     
    There's really only a handful of things needed for fortilink... Make sure DHCP server is on the interface, make sure NTP is listening, and make sure the port on the switch has the isl profile applied so it actually attempts to negotiate fortilink. The isl profile isn't always enabled on all ports on the switch, but I would expect it to be enabled on sfps by default.
     
    There are typically 2 lldp profiles on the switch, one labeled default and one labeled default-auto-isl. Only the ports that have the default-auto-isl will have fortilink enabled.
    post edited by brycemd - 2021/01/14 12:06:23
    #4
    pcarbonneau50
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    Re: Fortilink (switch - fortigate) over media converter not working ... 2021/01/14 16:06:52 (permalink)
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    I just had the same problem. Two FortiGates 60F in HA connected to two FSW124E-FPOE for redundancy and this works.
    Then when we connect a switch in another room through a fiber (tested) and through media converters, The port on the main room goes up but the switch never connects. If we move that switch to the main room and connect it using a network cable, then the switch comes up no problem. We move it back to the other room and connect it to the fiber again, nothing.. niet.. nada
     
    We will try a different model of media converter as this setup has already been done in another building by another cabling company and everything worked. 
    #5
    pyy
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    Re: Fortilink (switch - fortigate) over media converter not working ... 2021/01/15 07:06:54 (permalink)
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    Hi Tezro,
     
    The most of the media converters cannot understand vlans (802.1q) and thats why you are having this behaviour.
    #6
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