www.vtiinstruments.com
EMX-75XX Index
51
Multiple Network Ports
It is possible that the user computer, can have multiple network adaptors (physical/virtual).
Common example of this case, is use of Wireless Internet/Wi-Fi in Laptop computers, whose
Wired Ethernet connections are connected to LXI device connected network. In some cases,
virtual network adaptors could have been created for use by some of the installed applications on
user system. The easy solution to these problems is to disable all other Ethernet connections and
so force the computer to select the network port which is used by LXI Instrument.
Firewall
It is possible that the firewall of the computer may be stopping the data traffic to the connected
LXI device. It may not be always feasible to stop the Firewall completely, and hence the user may
contact their computer administrator for making exceptions in Firewall configuration to allow LXI
data traffic. Here are the list of ports and protocols, typically used by LXI devices.
Protocol /
Service
Port
Base
Protocol
Remarks
mDNS
5353
UDP/TCP
Zero-config protocol for
<hostname>.local address resolution; service discovery;
Multicast 224.0.0251, FF02::FB
HTTP
80
TCP
Instrument web pages (SFP) and driver communication
ICMPv4
ICMP
Typically enables echo request/respond for ping
ICMPv6
ICMP
Optional - Typically enables echo request/respond for ping, also
SLAAC for IPv6 addresses, RDDNS
Arp
Arp
Used to confirm address assignments
DHCPv4
67/68
UDP/TCP
IPv4 address assignment, DNS Server, Dynamic DNS, Gateway
DNS
53
UDP
Naming service
SSH
22
TCP
Bidirectional interactive text oriented communication
RPC port-
mapper
111
UDP/TCP
Builds upon Sun-RPC and port-mapper
VXI-11
Varies
TCP
VXI-11 instrument discovery
The exact port number varies; query the RPC port-mapper to
determine which port is current in use
LXI-eventsvc
5044
UDP/TCP
LXI Event support for instrument triggering; multicast
224.0.23.159, FF02::138. LXI Events can use other ports also, but
default port number is 5044
Ptp-event
319
UDP/TCP
LXI Profile IEEE 1588
Precision Time Protocol (PTP);
multicast 224.0.1.129, FF02::181
Ptp-general
320
UDP/TCP
LXI Profile IEEE 1588 Precision Time Protocol (PTP);
multicast 224.0.1.129, FF02::181
Data stream
9900
TCP
Driver data stream
T
ABLE
4-1:
STANDARD
PORTS,
PROTOCOLS,
AND
SERVICES
G
ENERAL
W
EB
P
AGE
O
PERATION
When initial connection is made to the EMX-2500, the instrument home page, or
Index
, appears.
This page displays instrument-specific information. This page is accessible from any other
instrument page by clicking on the EMX-2500 web page header. The EMX-2500 Navigation
Menu is displayed on the left hand side of every internal web page. The entries on the Navigation
Menu represent two types of pages: