User`s guide

218
Entity
Instance
Parameter
Values
Equivalent Web Parameter
a.b.c.d
l2tp n aot OFF,ON
Bring this tunnel up All the
time/On demand
l2tp n nocallto
0 - 4294967296
Bring this tunnel down if it is
idle for h hrs, m mins, s secs
l2tp n window
1 – 7
Default = 4
L2TP Window Size
l2tp n ll_ent
<blank>, PPP,
ETH
Route UDP packets over
interface x,y
l2tp n ll_add 0 - 2147483647
Route UDP packets over
interface x,y
l2tp n rnd_srcport OFF, ON Source Port
l2tp n name
Up to 30
characters
Name
l2tp n auth OFF,ON Authentication Off/Secret
l2tp n secret
Up to 80
characters
Authentication Off/Secret
Advanced
Configuration - Network > Virtual Private Networking (VPN) > L2TP> L2TP n>
Advanced
Retransmit interval s milliseconds
The value in this text box specifies the amount of time in milliseconds that the router will
wait before retransmitting a Start Control Connection Request (SCCRQ) frame. The default
value of 250ms should be changed to a higher value (say 4000ms) if L2TP is running over a
GPRS link.
Retransmit count n
When using L2TP over GPRS or satellite networks, the first few packets are sometimes lost.
Setting the retransmit count in the text box to a higher value than the default of 5 will
increase reliability of the tunnel.
Layer 1 Interface Sync port n/ISDN
These radio buttons select the layer 1 (physical) interface to be used to terminate the L2TP
connection. The available options are ISDN or one of the router’s synchronous serial ports.
When Sync port n is selected, the sync port number is selected from the drop-down list.
Allow this L2TP tunnel to answer incoming ISDN calls
When checked, this checkbox allows the L2TP entity to answer incoming ISDN calls.
MSN
The value in this text box specifies the filter for the ISDN Multiple Subscriber Numbering
(MSN). It is blank by default but when the answering facility (above) is enabled, the router
will only answer ISDN calls where the trailing digits match this MSN value. For example,
setting the MSN value to 123 will prevent the router from answering calls from any calling
number that does not end in 123. This parameter is not used when answering is off.