Switching

Hi all
 
i just bought a new firewall to replace an old one ( fortigate )
Firewall was connected to Juniper EX4200 switch but nothing worked
I searched what could be wrong on fortigate side but all seems to be OK ( my actual firewall is connected on the same switch without any problem )
On switch side, i saw that when the first firewall port was connected ( only this port connected to the switch ), MAC address was correctly learnt on the switch port ge-0/0/0 but when the second port of the firewall was connected on ge-0/0/1, MAC of firewall port 1 disappeard from the switch and i could only see the MAC of firewall port 2
are you aware about this kind of problem ?
Is there any parameter to set up ? ( Sticky MAC already tested without succes )

I tried on another EX4200 but still the same

I also tried on a Cisco 3550 switch without any problem

JUNOS Base OS Software Suite [12.3R6.6]

 
Thanks in advance

Is there any chance that the Fortinet is running a spanning tree protocol and plugging in the second port causes a loop which the Juniper correctly mitigates by shutting down ge-0/0/0?  You can check interface blocks due to STP by doing a "show ethernet-switching interface" when both ports are plugged in.

Hi

you found the problem

i do not understand why this could happen ...

the firewall is configured in interface mode ( no switch mode ) so it is theorically not possible to find a loop

i had to disable stp to get my firewall working ( wireshark sniffing did not show any loop )

I will check with fortinet

Thanks for your help