A raw socket IP transport interface can be configured for each RS-232 serial port on a node. This allows the serial port to receive TCP connections or UDP session packets from multiple remote hosts, or to create new sessions to remote hosts in order to send and receive serial data to and from those remote hosts.
There are port-level and service-level configuration requirements for a raw socket serial port to send and receive serial data in either server mode, client mode, or both modes.
Raw socket port-level configuration includes defining the end of packet checking parameters (idle time, length, special character) and the inter-session delay for transmitting session data over the serial link.
At the service level, an IP transport subservice is created within a VPRN service to associate the serial port with the VPRN service. TCP/UDP encapsulated serial data is routed within the corresponding Layer 3 VPRN service. The required configuration includes IP transport subservice local host and remote host configuration, TCP timers, and session control.
See Serial raw socket interface configuration commands for information about the required port-level configuration. For information about how the IP transport subservice operates within a VPRN service, as well as information about the required system-level configuration, see the 7705 SAR-Hm and SAR-Hmc Main Configuration Guide, Layer 2 and Layer 3 Services chapter, "Raw socket IP transport service".