Westermo MR Series - Manual (Page 172)

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Web Interface and Command Line Reference Guide www.westermo.com
Remote host:
This parameter is used to specify the IP address of the remote host, i.e. the device that will ter-
minate the L2TP connection.
Backup Remote host:
It is possible to specify a backup remote L2TP host server with this parameter. When PPP
attempts to connect using a L2TP connection and this field is used, then the PPP will not be
informed of any failure until BOTH remote hosts are attempted. When a ’good’ server is found
then that is the first one attempted for future connections.
UDP Interface:
This allows you to specify a lower interface to use for L2TP UDP sockets. This allows the unit
to raise the desired interface should it be disconnected.
UDP Interface #:
This parameter determines the instance number of the UDP Interface selected above.
Source port:
Source port selection. When set to “normal” the default port number of 1701 is used. When set
to “Variable” a random source port value will be used.
Listening mode:
When this parameter is “ON”, the unit will not actively try to establish an L2TP tunnel, it will
only use L2TP if the remote host requests it. Leaving the parameter set to “OFF” means the
unit will actively try to establish an L2TP connection with the remote host.
ServerMode:
Setting this parameter to “ON” enables the unit to act as an L2TP server.
Name:
This name is used in the establishment of L2TP tunnels to identify this router during the nego-
tiation.
Secret:
This parameter is only used if the Authenticate parameter is set to “ON”, in which case it is
used as part of the authentication process and both the router and the remote host must have
this parameter set to the same value. Note that if authentication is OFF and the remote host
requests authentication then this is the value used.
Authenticate:
Setting this parameter to “ON” enables authentication. Normally this is not necessary because
most host systems require that IPSec be used over L2TP tunnels.
Always on tunnel:
When this parameter is “ON”, the tunnel is always enabled. When set to “OFF”, the tunnel will
not activate automatically, but will wait until it is triggered by PPP.
Tunnel timeout if no call(s):
This parameter specifies a timeout in seconds after which the L2TP tunnel will be closed down
after the last L2TP call on that tunnel.
Retransmit time(ms):
This parameter specifies the amount of time in milliseconds that the unit will wait before re-
transmitting a Start Control Connection Request (SCCRQ) frame. The default value of 250ms
should be changed to a higher value, for example 4000ms, if you are using L2TP over GPRS.