Moxa Technologies OnCell G3111-HSPA series, Руководство пользователя

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OnCell G3111/G3151-HSPA Series Basic Settings and Network Settings
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DNS Settings
You can access DNS Settings by expanding the Network Settings item in the navigation panel.
DNS server 1: This is an optional field. If your network has access to a DNS server, you may enter the DNS
server’s IP address in this field. This allows the OnCell G3111/G3151-HSPA to use domain names instead of IP
addresses to access hosts.
The Domain Name System (DNS) is used to identify Internet domain names, and translate the names into IP
addresses. A domain name is an alphanumeric name, such as www.moxa.com, that it is usually easier to
remember than the numeric IP address. A DNS server is a host that translates this kind of text-based domain
name into the actual IP address used to establish a TCP/IP connection.
When the user wants to visit a particular website, the user’s computer sends the domain name (e.g.,
www.moxa.com) to a DNS server to request that website’s numeric IP address. When the IP address is
received from the DNS server, the user’s computer uses that information to connect to the website’s web
server. The OnCell G3111/G3151-HSPA plays the role of a DNS client, in the sense that it actively queries the
DNS server for the IP address associated with a particular domain name. The following functions in the OnCell
G3111/G3151-HSPA’s web console support the use of domain names in place of IP addresses: Time Server,
Destination IP Address (in TCP Client mode), Mail Server, SNMP Trap Server, and SMTP Server.
DNS server 2: This is an optional field. The IP address of another DNS server may be entered in this field for
times when DNS server 1 is unavailable.
Advanced Network Settings
Access Advanced Network Settings by expanding the Network Settings item in the navigation panel.
Advanced Network Settings is where the gratuitous ARP is configured.
Gratuitous ARP: In some applications, you may need the OnCell G3111/G3151-HSPA to send broadcast
packets to update the ARP table on the server. If you enable this function and set the send period, the OnCell
G3111/G3151-HSPA will periodically send broadcast packets at the specified time interval.
Auto IP Report Settings
You can access Auto IP Report by expanding the Network Settings item in the navigation panel.
When the OnCell G3111/G3151-HSPA products are used in a dynamic IP environment, users must spend more
time with IP management tasks. For example, if the OnCell works as a server (TCP or UDP), then the host,
which acts as a client, must know the IP address of the server. If the DHCP server assigns a new IP address to
OnCell, the host must have some way of determining OnCell’s new IP address.