VTI Instruments EX1401, Руководство пользователя

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50 EX1401 Web Page Operation
available on the network it is connected to, it will instead use Auto IP. Determining the Auto IP
address is discussed in the Network Configuration portion of
Section 2. Other discovery methods,
such as VXI-11, can be used as well.
C
OMMON
I
SSUES
Certain networking issues may prevent instrument discovery, such as connecting the instrument and
host computer to different sub-nets. You may need to contact your network administrator for
assistance with these issues. This section describes possible solutions for other common issues.
Multiple Network Ports
Your computer may have multiple physical or virtual network adaptors. For example, a laptop may
have wi-fi enabled as well as a wired Ethernet connection to the network containing the LXI device.
Some applications also create virtual network adaptors. To resolve this problem, disable all other
network adaptors to force the computer to select the network used by the instrument.
Firewall
A firewall may block some or all network traffic between your computer and the LXI device.
Contact your network administer for assistance with creating exceptions in the firewall
configuration to communication with the instrument. See the table below for a list of ports and
protocols typically used by the EX1401 and other 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: S
TANDARD
P
ORTS
, P
ROTOCOLS
,
AND
S
ERVICES
G
ENERAL
W
EB
P
AGE
O
PERATION
When initial connection is made to the EX1401, 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 EX1401 web page header. The EX1401 Navigation Menu is displayed on