Metek EX1200A SERIES, Руководство пользователя

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VTI Instruments Corp.
56 EX1200A Series Preparation for Use
Auto IP is a mechanism for finding an unused IP address in the range 169.254.X.Y where X is in
the range 1 - 254 and Y is in the range 0 - 255. The device will first attempt to obtain the specific
address 169.254.X.Y, where X and Y are the second-to-last and last octets of the device’s MAC
address. However, X will be set to 1 if it is 0 in the MAC address, and to 254 if it is 255 in the
MAC address. If this address is already in use, the unit will attempt to obtain other IP addresses in
a pseudorandom fashion until it finds one that is available.
To illustrate the Auto IP mechanism, Table 2-1 lists the Auto IP default address for some example
MAC addresses.
MAC Address Auto IP Default Address
00:0D:3F:01:00:01 169.254.1.1
00:0D:3F:01:01:01 169.254.1.1
00:0D:3F:01:A3:28 169.254.163.40
00:0D:3F:01:FE:FE 169.254.254.254
00:0D:3F:01:FF:FE 169.254.254.254
T
ABLE
2-1: A
UTO
IP D
EFAULT
A
DDRESS
A
SSIGNMENT
If a static IP address assignment is preferred, one can be optionally assigned via the embedded
web page interface. This is done by clicking the
Network Configuration link, disabling DHCP,
and then assigning a static IP address. For more information, see Network Configuration in
Section 7 .
However, a much more convenient and recommended way to obtain the benefits of a static IP
address is to employ DHCP, but assign the instrument a reserved IP address in your company’s
DHCP server configuration. This reserved address, linked to the EX1200A’s MAC address on the
DHCP server, would be assigned to the EX1200A at power up initialization without having to
manually set it on the EX1200A. The DHCP server configuration provides a centralized,
controlled database of assigned IP addresses, preventing accidental assignment of the same IP
address to multiple instruments. Consult your company’s Information Technology department for
assistance.
VXI-11 Device Discovery is also supported by the EX1200A. This allows all EX1200As on a
local network to be found without knowledge of their MAC address or IP address with the use of a
broadcast message.
To return an EX1200A to the default network settings, the Reset Button can be used. For more
information, see Reset Button in
Section 3 .
N
ETWORK
T
ROUBLESHOOTING
If an error occurs when trying to discover the EX1200A (see Web Page Operation in Section 7 for
more information on discovery), it may be necessary to change the network settings for the
EX1200A and the host PC. By using the following methodology, most network-related issues can
be resolved:
1) Restore the EX1200A’s Default Network Settings
2) Determine PCs Network Settings
3) Set the EX1200A to Auto IP or Set the EX1200A to Static IP
4) Restore the Host PCs Network Settings
5) Using Multiple Network Cards
Restore the EX1200A’s Default Network Settings
It may be the case that the EX1200A is in an unknown network configuration. The EX1200A can
be returned to its default state by pressing the Reset Button located at the rear of the chassis.
1) Power off the EX1200A.