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16
Preparation (continued)
Ⅵ3-1 VN-E4 with Factory Default Settings
Refer to
START-UP GUIDE
on procedures for setting the IP address when VN-E4 is in the factory default settings.
Ⅵ3-2 VN-E4 for which IP address is known
When the IP address of VN-E4 is known, it can be changed by accessing the built-in web page of VN-E4 via the PC’s Internet Explorer.
See A5. Setting Using Internet ExplorerB.
Ⅵ3-3 When IP address of VN-E4 is unknown
When IP address of VN-E4 is unknown, there are 3 methods to know IP address.
a) Use the search tool
The search tool in attached CD-ROM is available to know IP address of VN-E4. Refer readme file of the tool for detailed
information.
b) Initialize VN-E4
Pushing [RESET] button on rear panel over 5 seconds initializes VN-E4 to factory default setting.
c) Capture packets on network
Perform following procedures to find out the IP address of VN-E4.
1. Configuration for looking up IP address
Set up a PC with the network monitor software installed on it. The network monitor software will capture and look up incoming
packets at the PC. An example of free network monitor software that may be obtained from the Internet is Ethereal.
Connect VN-E4, the switching hub and PC using a straight LAN cable of Category 5 and above. (Do not connect the DHCP
server to the switching hub.)
2. Capturing packets sent by VN-E4
Launch the network monitor software on the PC and start capturing.
Supply power to VN-E4 using the AC adaptor. Depending on the settings, the amount of time required for VN-E4 to start up may
vary from about 1 to 2 minutes. VN-E4 will start packet transmission during this interval, and capturing will end in about 2 minutes.
3. Looking up captured packets
● If ARP request is sent first by VN-E4
If the following ARP request is sent first by VN-E4, then the destination IP address of this packet will be the IP address of
VN-E4. (In this case, the subnet mask of VN-E4 is unknown.)
Packet type: ARP request
Source IP address: 100.100.254.169
This ARP request packet is used to check whether there are devices that possess a duplicate IP address with VN-E4. In this
case, ADHCPB and APPPoEB of VN-E4 are set to AOffB.
● If the DHCP Discover packet is sent first by VN-E4
The DHCP client function of VN-E4 is set to ON. In a LAN environment without a DHCP server, the DHCP will time out in
about 2 minutes after the power is turned on, and VN-E4 will be started up using the following IP address.
IP address 192.168.0.2
Subnet mask 255.255.255.0
Default gateway 192.168.0.254
● If the following broadcast packet is sent first by VN-E4
Destination MAC address 0xFFFFFFFFFFFF
Ethernet Type 0x8863
The APPPoEB of VN-E4 is set to AOnB. In a LAN environment without a PPPoE server, it will time out in about 2 minutes after
the power is turned on, and VN-E4 will be started up using the following IP address.
IP address 192.168.0.2
Subnet mask 255.255.255.0
Default gateway 192.168.0.254
4. IP address setting on PC
The subnet mask of VN-E4 is unknown when methods 1. to 3. are used to look up the IP address, and there is a possibility
that this may be 255.255.255.254.
Set the IP address of the PC such that it is in the same segment with VN-E4.
(Example 1) When the IP address of VN-E4 is 10.1.2.2
By setting the PC’s IP address to 10.1.2.3 and the subnet mask to 255.255.255.0, they will be in the same segment and
communication will be enabled even if the subnet mask of VN-E4 is 255.255.255.254.
(Example 2) When the IP address of VN-E4 is 10.1.2.3
By setting the PC’s IP address to 10.1.2.2 and the subnet mask to 255.255.255.0, they will be in the same segment and
communication will be enabled even if the subnet mask of VN-E4 is 255.255.255.254.
Whether communication is enabled may be determined by sending a Ping from the PC to the IP address of VN-E4.
For procedures on changing settings of VN-E4 via Internet Explorer on the PC, refer to A5. Setting Using Internet ExplorerB.
3. IP Address Setting