GNSS NMEA data IP transport service

IP transport services are used to send GNSS National Marine Electronics Association (NMEA) data to remote hosts. All IP transport functionality supported for serial data over raw sockets is also available for NMEA data. See Raw socket IP transport service for information.

An IP transport subservice within a Layer 3 VPRN service can be configured to transmit GNSS NMEA data from the GNSS receiver (as the IP transport local host) to one or more remote hosts. See GNSS NMEA data over IP transport service. Any packets sent from remote hosts toward the local host of the IP transport subservice are dropped.

Use the following syntax to create an IP transport subservice within a VPRN service.

CLI syntax:

config>service 
    vprn service-id [customer customer-id] [create] 
        ip-transport ipt-id [create] 
            description description-string
            filter-unknown-host 
            local-host ip-addr ip-addr port-num port-num protocol {tcp | udp} 
            remote-host host-id [ip-addr ip-addr] [port-num port-num] [create] 
                description description-string 
                name host-name 
                exit 
            shutdown 
            tcp 
                inactivity-timeout seconds 
                max-retries number 
                retry-interval seconds 
            exit 
        exit 
    exit 
exit 

To enable the transport of NMEA data from the local host, configure the ipt-id as gnss. The following example is an IP transport subservice configuration output for the transport of NMEA data.

A:NOK-B>config>service>vprn# info
----------------------------------------------
        ip-transport gnss create
                description "ip-transport to send NMEA data to multiple hosts"
                filter-unknown-host
                local-host ip-addr 192.0.2.1 port-num 2000 protocol tcp
                remote-host 1 create ip-addr 128.5.5.1 port-num 32000
                exit
                remote-host 2 create ip-addr 128.4.4.2 port-num 32000
                exit
                no shutdown
            exit
            no shutdown
----------------------------------------------
A:NOK-B>config>service>vprn#

For information about configuring NMEA parameters on the GNSS receiver, see the 7705 SAR-Hm and SAR-Hmc Interface Configuration Guide, "GNSS configuration".