Lantronix MSS1-T, Reference Manual

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Using the MSS Multihost Mode
5 - 9
5.4 Multihost Mode
Multihost mode is used to set up a data pipe between a serial device attached to the MSS and
multiple hosts on the network. Data from any network host goes out of the MSS serial port, and
data from the serial port is sent to all connected network hosts.
The MSS attempts to send data in the order it is received. That is, it reads in and sends data from
one host before reading in any data from another host. The MSS will not perform any packetiza-
tions or conversions, nor will it change the data to show which host(s) it came from; the host(s)
and serial device handle this independent of the MSS.
To configure the MSS for multihost mode, first set the MSS for a dedicated multihost connection
using the Change Dedicated Hostlist command.
Figure 5-15: Setting the MSS for Multihost Mode
Next, configure the list of hosts with which to communicate using the Host Add command. The
host list can include up to 8 host entries in any combination of LAT, SPX, Telnet, Rlogin, and UDP
addresses. For more information about formatting host list entries, see the Host command on page
6-28.
Figure 5-16: Adding Entries to the Host Table
In the previous example, the UDP host entry is actually a broadcast IP address. Data would be
sent to all hosts on that particular subnet.
NOTE: Any changes to the host table don't take effect until the port is logged out or the
MSS is initialized.
To remove an entry from the host table, use the Show Hostlist command to find out its entry
number, and then use the Host Delete command.
Figure 5-17: Removing Entries from the Host Table
The MSS will preface TCP and UDP sends with a Ping packet to make sure the remote hosts are
alive. If they are alive, the MSS makes the real connection and passes the data. If any of them aren’t
alive, the MSS doesn’t connect or retry.
Local>> CHANGE DEDICATED HOSTLIST
Local>> HOST ADD LAT commserv
Local>> HOST ADD SPX
sap_name
Local>> HOST ADD TCP 192.0.1.35:T
Local>> HOST ADD UDP 192.0.2.255
Local>> LOGOUT PORT 1
Local>> SHOW HOSTLIST
Local>> HOST DELETE 2
Local>> LOGOUT PORT 1