Note

The following section is only applicable to the DSC Platform.

The NP Gateway only functions as expected if the appropriate connections and communications have been established between the DSC and the PSX Platforms, which means the following:

  • PSX must be configured to accept the NP Gateway connections

  • DSC must be able to exchange User Datagram Protocol (UDP) packets with the PSX

  • PSX Host and the underlying PSX Host Connection objects have to be connected (registered with the PSX)

     

In case of PSX alarms, verify the following:

  • PSX is running
  • PSX Host has the host and port configured on the DSC corresponding to the host and port on which the PSX is listening for DSC Gateways (refer to PSX Node Configuration)

  • The Host attribute of the PSX Host object resolves to the correct IP address on the affected DSC routing slot if you are using a hostname for the PSX Host (ping the PSX host from the DSC routing slot)

  • Each routing slot has been configured with appropriate IP routes to reach the PSX, using the correct Ethernet device (ping the PSX host from the DSC routing slot)
  • PSX has been configured with appropriate IP routes to reach the DSC slot (ping the PSX host from the DSC routing slot)
  • You have created an appropriate firewall module on the DSC to allow UDP traffic to and from the PSX, and that you have restarted the firewall with that configuration (refer to Firewall Configuration)
  • PSX has been configured with a DSC Gateway that matches the Gateway Name of the PSX Host Connection
Caution

The NPGWPSXQUEUE_FULL  (1625) alarm indicates that the DSC Platform is not processing the NP requests fast enough to keep up with the incoming requests, so some IAM messages are being forwarded without an NP lookup. This scenario can occur because of an unanticipated level of incoming call attempts, or because there is some kind of network or system degradation that is slowing the processing of NP requests. An analysis of the query rate from the NP Gateway statistics files can help narrow down the cause. If this is a capacity issue, consider adding more capacity by adding more PSX or NPGW cards.

 For more information about NP Gateway-related alarms, refer to DSC Alarm Definitions.


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