Siemens OSM Bedienungsanleitung PDF herunterladen (Seite 35)

Important OSM/ESM Functions

2-15

Industrial Ethernet OSM/ESM Network Management

C79000-G8976-C137-08

2.13 BOOTP/DHCP

If there is a BOOTP or DHCP server in your network, the OSM/ESM can

automatically obtain the following from the server:

S the IP address,

S the subnet mask,

S the IP address of the default gateway,

S the IP address of the TFTP server,

S the configuration file (Section 2.17) / or the firmware file name

If the BOOTP/DHCP function is activated on the OSM/ESM (default), BOOTP and

DHCP are always started after starting up the device.

BOOTP and DHCP can only be activated/deactivated together. When started, the

OSM/ESM sends both BOOTP and DHCP frames. If a BOOTP and a DHCP

server reply in the network, the DHCP server will be given priority by the

OSM/ESM.

Note

The BOOTP/DHCP process delays the startup of the device by approximately 40

seconds if the BOOTP/DHCP server is not obtainable. For this reason,

BOOTP/DHCP is deactivated as soon as an IP address is set using WBM, CLI,

direct SNMP access or the Primary Setup Tool.

Note

DHCP provides a mechanism that allows a client to lease an IP address for a

limited lease time. When the lease time expires, the OSM/ESM can no longer be

contacted using its previous IP address. If you use DHCP, please check the

(default) settings of the DHCP server regarding the lease time.

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Siemens OSM Bedienungsanleitung Seite 35