DIR-816
Wireless AC750 Dual Band Router with 3G/LTE
Support and USB Port
User Manual
Configuring via Web-based Interface
Parameter
Description
Enable DPD
Move the switch to the right to enable using DPD protocol for this
tunnel. Such a setting allows to check the status of a remote host: if
encrypted packets exchange between the router and the remote host
breaks down, the router starts sending DPD messages to the remote
host. If the switch is moved to to the left, the
DPD delay
and
The
maximum number of failures DPD
fields are not available for
editing.
DPD delay
A time period (in seconds) between attempts to check the status of a
remote host. By default, the value
5
is specified.
The maximum
number of failures
DPD
A number of DPD messages that were sent to check the status of a
remote host and left unanswered. By default, the value
3
is specified.
If a remote host does not answer the specified number of messages,
the router breaks down the tunnel connection, removes the encryption
keys, and tries to activate the connection.
TCP MSS
Maximum Segment Size of a TCP packet.
This parameter influences
the size of a TCP packet which will be sent from a remote host to the
router.
If the
Manual
value is selected, you can specify the parameter in the
TCP MSS Value
field.
If the
Path MTU Discovery
value is selected, the parameter will be
configured automatically.
TCP MSS Value
The maximum size (in bytes) of a non-fragmented packet. The field is
available for editing when the
Manual
value is selected from the
TCP
MSS
drop-down list.
Allow traffic between
tunneled networks
Move the switch to the right to allow data exchange between subnets
with which IPsec tunnels have been created.
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