Configuring VPN
GRE Tunnel
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SRP 521 VoIP Gateway Administration Guide
6
Enable
This field indicates whether you want to enable or
disable the tunnel.
Details of GRE
The Status, Checksum, Sequence, Key, Key Value,
Tunnel Name, Destination IP or HostName, and Remote
IP Address/Subnet Mask of the session are displayed.
Checksum
From this drop-down menu, you can select None, Both,
Input or Output checksum values. Input requires that all
input packets have the correct checksum. Output
calculates checksums for outgoing packets. Both will do
both Input and Output checksums. The default is None.
Sequence
From this drop-down menu, choose None, Both, Input
and Output sequence values. Output enables
sequencing of outgoing packets. Input requires that all
input packets are serialized. Both will do both Input and
Output sequencing. The default is None.
Key
From this drop-down menu, choose None, Both, Input
and Output value. The Input parameter sets the key for
input. The Output parameter sets the key for output. The
Both parameter sets the key to use in both directions.
The default is None.
Key value
The key value. The Key Value must be number is
between 0 and 4294967295.
WAN Interface
The WAN subinterface on which you want to create a
tunnel with the remote site through this interface.
Destination IP or
HostName
The destination IP address of the remote network or
host to which you want to build a tunnel.
Remote IP Address/
Subnet Mask
The IP address and subnet mask of the remote host. You
can use the Add button to add additional addresses.
Modify Remote IP
Address/Subnet
Mask
You can modify the Remote IP Address and Subnet
Mask in this field. Use the Add button to add it into the
list of Remote IP Address/Subnet Mask. For example:
192.168.2.0/24 or 192.168.3.0/32.
Field
Description
