Nortel BCM 3.7, Manual

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PPTP 757
Programming Operations Guide
4 Click the Tab key to save the settings.
Adding a PPTP client
A PPTP Client is a remote Business Communications Manager or other similar PPTP capable
device that you allow to connect to this Business Communications Manager to establish a PPTP
tunnel.
The maximum number of PPTP clients is 32.
To add a PPTP client:
1 On the navigation tree, click the Services key and click the VPN key.
2 Click the PPTP heading.
The PPTP Summary screen appears.
Keep Alive Interval Allows you to specify the amount of time Business Communications Manager waits without
any data traffic on the tunnel before it sends an Echo Request message.
When the far end of the tunnel receives an Echo Request, the system at the far end must send
an Echo Response message. If the far end of the tunnel sends an Echo Response message,
Business Communications Manager keeps the tunnel open. If the far end of the tunnel does
not send an Echo Response message, the tunnel is closed.
You can enter a value from 1 to 65000 seconds.
The default value is 60 seconds.
Echo Timeout Allows you to specify the amount of time Business Communications Manager waits for an
Echo Response message. If the Echo Response message is not received before this time
limit, Business Communications Manager tears down the PPTP tunnel.
You can enter a value from 1 to 65000 seconds.
The default value is 60 seconds.
Max
Retransmissions Allows you to specify the maximum number of times TCP retransmits the data packets. Data
packets are retransmitted when the far end of a TCP connection does not acknowledge the
receipt of a data packet.
Business Communications Manager uses a TCP connection to establish a PPTP tunnel. The
tunnel establishment packets may get lost while being transported over busy internet, effecting
the private network connectivity between sites. Therefore, it is recommended to tune this
parameter according to the performance of the internet carrying the PPTP tunnel traffic.
You can enter a value from 1 to 65000 packets.
The default value is 9 packets.
Note : If you change this value, you must reboot Business Communications Manager.
Client IP
Authentication Allows to enable or disable Client Authentication.
When Client Authentication is enabled, only clients entered on the Client List screen can open
a PPTP tunnel. When Client Authentication is disabled, any client with valid credentials can
open a PPTP tunnel.
Note that valid credentials are required for clients on the Client List as well.
You can choose Enabled or Disabled.
The default value is Disabled.
Note : If you change this value, you must reboot Business Communications Manager.
Table 218 PPTP Summary settings (Continued)
Attribute Description