GRE
GRE (Generic Routing Encapsulation) protocol is a network layer protocol (such as IP and IPX)
data packets are encapsulated, so these encapsulated data packets to another network layer
protocol (IP)transmission. GRE Tunnel (tunnel) technology, Layer Two Tunnelling Protocol VPN
(Virtual Private Network).
GRE Tunnel: enable or disable GRE function
Number Switch on/off GRE tunnel app
Status Switch on/off someone GRE tunnel app
Name：GRE tunnel name
Through：The GRE packet transmit interface
Peer Wan IP Addr：The remote WAN address
Peer Subnet：The remote gateway local subnet, e.g.: 192.168.1.0/24
Peer Tunnel IP：The remote tunnel ip address
Local Tunnel IP：The local tunnel ip address
Local Netmask：Netmask of local network
Keepalive：Enable or disable GRE Keepalive function
Retry times：GRE keepalive detect fail retries
Interval：The time interval of GRE keepalive packet sent
Fail Action The action would be exec after keeping alive failed
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