Advantech IMC-710-A, Руководство пользователя

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7 SNMP Management Module User Manual
2.4 Using DHCP
2.4.1 DHCP Disable (Static IP Addressing)
DHCP is disabled in the default configuration. Initially, modules are assigned a Static
default IP Address of 10.10.10.10. Changes to the Static IP Address can be added
manually through Web-HTTP, an RS-232 Serial session, or Telnet. The changes will
be initiated following reboot of the module.
2.4.2 DHCP Enable (Dynamic IP Addressing)
If a DHCP server is present on the network and DHCP is enabled, the DHCP client
will initiate a dialog with the server during the boot up sequence. The server will then
issue an IP address to the management card. Once the new IP address is received.
Refer to the About Serial Port Configuration for more information about Enabling/
Disabling DHCP. When there is no DHCP server on the network, use serial
configuration to manually set the IP addresses.
When DHCP is enabled, the IP address (default 10.10.10.10 or user configured) is
saved. When DHCP is disabled, the saved IP address will be reinstated and the
device will reboot.
DHCP servers give out lease times: devices renew their leases based on the
administrator-specified time. If a device cannot renew its lease, and the lease
expires, the device will be given the IP address 10.10.10.10.
2.5 Main Serial/Telnet Configuration Screen
After launching a serial session using a CLI (Command Line Interface) or a TELNET
session, an initial self-test is performed and the main screen will display the following
message: "Welcome to SNMP Management Module" and ready to accept user
account/password.
2.5.0.1 Assigning IP Information
To modify the saved parameter values (i.e., assign IP address and subnet mask),
key command configure to enter configure mode. Key command ip address X.X.X.X
mask X.X.X.X to set the IP address and subnet mask for the connected device, and
pressing Enter. (Key this command ip address X.X.X.X. to change IP address only)
When finished, key "exit" to leave configure mode and key command: "show ip". It
will display now ip setting information.
2.5.0.2 Creating Community Strings for SNMP
The purpose of community strings is to add a level of security to a network. The
default community string is named "public" and has read/write access. Do not delete
the community string “public” until the new community string has been tested. Add
necessary custom community strings such as one with read/only access (for general
use), the other with read/write access (for the administrator).
To create a new community string, key in configure to enter configuration mode, key
in snmp community XXX rw to add the name of the new community (up to 20
characters, no spaces) and community string's access rights, and press Enter. The
following is the community string's access rights:
ro = read-only access