Technical data

Configuring Routing
4.4 Configuring GATED
5. Start GATED by entering the command START ROUTING/GATED.
See the Compaq TCP/IP Services for OpenVMS Management Command
Reference manual for detailed descriptions of the SET GATED and START
ROUTING/GATED commands.
If you do not format the configuration file correctly, GATED terminates.
For specific information about how to edit the GATED configuration file, see
Appendix A.
4.4.1 Datagram Reassembly Time
Reassembly is the process of reconstructing a complete data message from
received fragments. The reassembly timer determines the length of time allowed
for the reassembly process. You can modify the reassembly timer to ensure that
IP datagram fragments are optimally reassembled at the destination host.
Consider the following when setting the reassembly timer:
• If the timer expires before the host receives all the fragments, they are
discarded.
• An inappropriately small interval might result in too many datagrams being
discarded.
• An excessive interval might degrade internet performance.
Enter the following commands to reset the reassembly timer:
• For the current session:
TCPIP> SET PROTOCOL IP /REASSEMBLY_TIMER=n
• To reset at the next TCP/IP Services startup:
TCPIP> SET CONFIGURATION PROTOCOL IP /REASSEMBLY_TIMER=n
In the following example, the first command changes the IP reassembly time to
20 seconds on the running system. This new setting remains in effect until the
next TCP/IP Services startup.
The second command makes the change permanent by modifying the
configuration database, TCPIP$CONFIGURATION.DAT.
TCPIP> SET PROTOCOL IP /REASSEMBLY_TIMER=20
TCPIP> SET CONFIGURATION PROTOCOL IP /REASSEMBLY_TIMER=20
4.4.2 Enabling Forwarding
To enable packet forwarding between networks, enter the following TCP/IP
management command:
TCPIP> SET PROTOCOL IP /FORWARD
To ensure this is set up the next time TCP/IP Services is restarted, enter the
following command:
TCPIP> SET CONFIGURATION PROTOCOL IP /FORWARD
Display the setting using the following command:
TCPIP> SHOW PROTOCOL /PARAMETERS
Configuring Routing 4–7