GRE KeepAlives Fortios

In this case we will display a basic GenericRoutingEncapsulation tunnel cfg for FortiOS and JunOS





FGT GRE cfg with KeepAlives set for 10 second interval and 20 failures

We also configured the GRE1 interface with layer3 details

config system interface

    edit "GRE1"

        set vdom "root"

        set ip 192.0.2.129 255.255.255.255

        set allowaccess ping

        set type tunnel

        set remote-ip 192.0.2.130 255.255.255.255

        set snmp-index 13

        set interface "wan1"

    next

end

A juniper SRX with no KeepAlives enabled

KeepAives does not need to be set on both ends. A Non GRE-keepAlive device will respond back.

http://socpuppet.blogspot.com/2015/09/gre-tunnels-fortigate.html

NSE ( network security expert) and Route/Switching Engineer

kfelix  -----a----t---- socpuppets ---dot---com

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