Technical data

Configuring Serial Lines
3.2 Setting Up a PPP Interface (Alpha Only)
3.2.1.4 Configuring a PPP Interface
• Configuring the PPP dialup provider
Use the SET INTERFACE command and qualifiers to configure the interface
for a serial PPP connection and assign a host name, IP address, network
mask, and IP address for the client host, as applicable:
TCPIP> SET INTERFACE PPn /SERIAL_DEVICE=TTn: /HOST=IP_address -
_TCPIP> /NETWORK_MASK=IP_address /DESTINATION=IP_address /COMPRESS=AUTO
In this command:
– n is the controller name and unit number.
– The /HOST address is the IP address.
– The /NETWORK_MASK IP address is required if your network uses
subnets.
– The /DESTINATION address is the IP address assigned to the client host
making a connection request. This address always overrides the client’s
own IP address, if the client has one.
– /COMPRESS=AUTO turns off IP header compression unless the client
uses it.
• Configuring the PPP client (OpenVMS Alpha only) (Optional)
Use the SET INTERFACE command and /HOST qualifier to assign an IP
address:
TCPIP> SET INTERFACE PPn /SERIAL_DEVICE=TTn: /HOST=IP_address
In this command, n is the interface number. If you omit the interface number,
PP0 is used.
If you do not specify your host’s IP address using SET INTERFACE, the
dialup provider or terminal server provides an IP address after the connection
is established.
Note
If the connecting client host has only a loopback and tunnel interface
defined:
1. A default route to the PPP interface is added to the routing table
when the connection is established.
2. The IP address of the PPP interface is assigned to the logical
names TCPIP$INET_HOSTADDR and UCX$INET_HOSTADDR
(for backward compatibility).
3.2.1.5 Enabling IP Forwarding (Dialup Provider Only)
Enter the following command to enable IP forwarding:
TCPIP> SET PROTOCOL IP/FORWARD
To enable IP forwarding in the configuration database, enter the following
command:
TCPIP> SET CONFIGURATION PROTOCOL IP/FORWARD
Configuring Serial Lines 3–7