problème communication vlan

[g_rayan]

hi guys 

I create two interface vlan 300 between my switch and my fortigate and I have no answer ping between the two interfaces What I is the probleme in my configuration ?my configswitch cisco

interface GigabitEthernet0/1 switchport access vlan 300 switchport mode access

interface Vlan300 ip address 80.45.28.253 255.255.255.252

fortigate 200A

edit "internal3" set vdom "root" set allowaccess ping https snmp http fgfm set type physical

edit "Vlan 300" set vdom "root" set ip 80.45.28.254 255.255.255.252 set allowaccess ping https snmp fgfm set interface "internal3" set vlanid 300

you know configuration examples ?thank you for your help

[emnoc]

will for starters you have one side  tagged ( 802.1q  ) and the cisco access mode.

Either change the  cisco to a trunk mode ( 802.1q )

config  term

  int gi 0/1

     no switchport access vlan 300

     switch mode trunk

     switch trunk allow vlan  300

 end

or remove the vlan interface and make the  FGT access mode.

[g_rayan]

hi 

when i type this commande "switch mode trunk" i nave this message

Switch(config-if)#switchport mode trunk Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode. Switch(config-if)#

[emnoc]

Depending on   cisco switch type you have to set the encapsulation also.

e.g  ( check the capabilities of the interface 1st )

show int  gi 0/1 cap

Now we can set the  trunk encapsulation

config term

  int gi 0/1

     switch trunk encapsulation 802.1q

    do copy runn start

end

[g_rayan]

it works now thanks