User`s manual
VTI Instruments Corp.
38 EX7000 Series Web Page Operation
Device Info Tab
If the Device Info tab is clicked, information regarding the EX7000 mainframe is available as well
as the version of the SFP, firmware, and configuration.
F
IGURE 4-6: DEVICE INFORMATION WEB PAGE
NETWORK CONFIGURATION
The EX7000 Network Configuration page can be seen in Figure 4-7. By default, the EX7000
will attempt to locate a DHCP server. If one is found, the IP address assigned by the DHCP server
will be assumed, along with subnet masks, gateway, etc. Otherwise, after a timeout of 20 seconds,
the unit will attempt to obtain an IP address by using Auto IP (IPv4 Dynamic Link Local
Addressing).
NOTE The EX7000 can be returned to a known, default network configuration by using the LCI (LAN
Configuration Initialize) Mechanism. See Reset Button for more information.
Auto IP is a mechanism for finding an unused IP address in the IANA assigned range
169.254.X.Y (169.254/16) where X is in the range 1 to 254 and Y is in the range 0 to 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 for conformance with the Auto IP
specifications. If this address is already in use, the unit will attempt to obtain other IP addresses in
the 169.254/16 range in a pseudorandom fashion until it finds one that is available.
To illustrate the Auto IP mechanism, Table 4-1 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
TABLE 4-1: AUTO IP DEFAULT ADDRESS ASSIGNMENT