Advantech ICR-1601 - GRE Rule Configuration Window

ICR-1601
159
GRE Rule Configuration Window
Item
Value setting
Description
Tunnel Name
A Must fill setting
Enter a tunnel name. Enter a name that is easy for you to identify.
Value Range: 1 ~ 9 characters.
Interface
1. A Must fill setting
2. WAN 1 is selected
by default
Select the interface on which GRE tunnel is to be established. It can be the
available WAN and LAN interfaces.
Operation Mode
1. A Must fill setting
2. Always on is
selected by default
Define operation mode for the GRE Tunnel. It can be Always On, or Failover.
If this tunnel is set as a failover tunnel, you need to further select a primary
tunnel from which to failover to.
Note: Failover mode is not available for the router with single WAN.
Tunnel IP
An Optional setting
Enter the Tunnel IP address and corresponding subnet mask.
Remote IP
A Must fill setting
Enter the Remote IP address of remote GRE tunnel gateway. Normally this is
the public IP address of the remote GRE gateway.
MTU
1. A Must filled
setting
2. Auto (value zero) is
set by default
MTU refers to Maximum Transmission Unit. It specifies the largest packet
size permitted for Internet transmission.
When set to Auto (value ‘0’), the router selects the best MTU for best
Internet connection performance.
Value Range: 0 ~ 1500.
Key
An Optional setting
Enter the Key for the GRE connection.
Value Range: 0 ~ 9999999999.
TTL
1. A Must fill setting
2. 1 to 255 range
Specify TTL hop-count value for this GRE tunnel.
Value Range: 1 ~ 255.
Keep alive
1. Unchecked by
default
2. 5s is set by default
Check the Enable box to enable Keep alive function.
Select Ping IP to keep live and enter the IP address to ping.
Enter the ping time interval in seconds.
Value Range: 5 ~ 999 seconds.
Remote Subnet
A Must fill setting
Specify the remote subnet for this GRE tunnel.
The Remote Subnet format must be IP address/netmask (e.g. 10.0.0.2/24).
It is for the Intranet of GRE server peer. So, at GRE client peer, the packets
whose destination is in the dedicated subnet will be transferred via the GRE
tunnel. Others will be transferred based on current routing policy of the
security gateway at GRE client peer.
If you entered 0.0.0.0/0 in the Remote Subnet field, it will be treated as
a default gateway setting for the GRE client peer, all packets, including the
Internet accessing of GRE client peer, will go through the established GRE
tunnel. That means the remote GRE server peer controls the flow of any
packets from the GRE client peer. Certainly, those packets come through the
GRE tunnel.
DMVPN Spoke
Unchecked by
default
Specify whether the router will support DMVPN Spoke for this GRE tunnel.
Check Enable box to enable DMVPN Spoke.
IPSec Pre-shared
Key
A Must fill setting
Enter a DMVPN spoke authentication Pre-shared Key (8 ~ 32 characters).
Note: Pre-shared Key is available only when DMVPN Spoke is enabled.
IPSec NAT
Traversal
Unchecked by
default
Check Enable box to enable NAT-Traversal.
Note: IPSec NAT Traversal will not be available when DMVPN is not enabled.