Billion BiPAC 8700VAX(L)-1600, Руководство пользователя, Страница: 281 / 327

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GRE
Generic Routing Encapsulation
(GRE) is a tunneling protocol that can encapsulate a wide variety
of network layer protocol packets inside virtual point-to-point links over an Internet Protocol (IP)
network. And the common use can be GRE over IPSec.
Note:
up to 8 tunnels can be added, but only 4 can be activated.
Name:
User-defined identification.
WAN Interface:
Select the exact WAN interface configured for the tunnel as the source tunnel IP.
Select Default to use the now-working WAN interface for the tunnel.
Local Tunnel Virtual IP:
Please input the virtual IP for the local tunnel.
Local Netmask:
Input the netmask for the local tunnel.
Remote Tunnel Virtual IP:
Please input the virtual destination IP for tunnel.
Remote Gateway IP:
Set the destination IP for the tunnel.
Remote Network:
Select the peer topology, Single address (client) or Subnet.
IP Address:
Set the IP address if the peer is a client. If the peer is a subnet, please enter the IP and
netmask.
Enable Keepalive:
Normally, the tunnel interface is always up. Enable keepalive to determine when
the tunnel interface is to be closed. The local router sends keepalive packets to the peer router, if
keepalive response is not received from peer router within the allowed time (‘retry time’ multiply
‘interval’, based on default settings, the time interval can be 30 seconds), the local router will shut up
its tunnel interface.
Keepalive Retry Times:
Set the keepalive retry times, default is 10.
Keepalive Interval:
Set the keepalive Interval, unit in seconds. Default is 3 seconds.