Configuring DA Discovery for Dial-up Networks

If the UAs or SAs are separated from the DA by a dial-up network, you can configure DA discovery to reduce or eliminate the number of discovery requests and DA advertisements. Dial-up networks usually incur a charge when they are activated, so minimizing extraneous calls can reduce the cost of using the dial-up network.

You can disable DA discovery completely using the method described in "Limiting UAs and SAs to Statically Configured DAs". If DA discovery is completely disabled, the net.slp.DAAddresses property must be set in slp.conf on the hosts executing UAs and SAs so that they access the correct DA.

You can reduce unsolicited DA advertisements and active discovery by increasing the DA heartbeat period and the active discovery period. In the following example, both the active discovery interval and the DA heartbeat are set to about 18 hours. The first line shows the setting for the host executing the DA:

net.slp.DAHeartBeat=65535

On the hosts executing the UAs and SAs, the active discovery interval is configured as:

net.slp.DAActiveDiscoveryInterval=65535

Both property values are measured in seconds.