Hirschmann MS30, Power MICE, MACH 4000, OCTOPUS, Руководство пользователя

Страница: 44 / 196

Entering the IP parameters
44
2.6 System configuration via DHCP
Layer 2 Enhanced with Layer 2 Professional
Release 1.0 10/05
The special feature of DHCP in contrast to BOOTP is that the server can only
provide the configuration parameters for a certain period of time (“lease”).
When this time period (“lease duration”) expires, the DHCP client must at-
tempt to renew the lease or negotiate a new one. A response similar to
BOOTP can be set on the server (i.e. the same IP address is always assi-
gned to a particular client using the MAC address), but this requires the ex-
plicit configuration of a DHCP server in the network. If this configuration was
not performed, a random IP address – whichever one happens to be availa-
ble – is assigned.
On delivery DHCP is enabled.
As long as DHCP is activated, the Switch attempts to obtain an IP address.
If it cannot find a DHCP server after restarting, it will not have an IP address.
To activate/deactivate DHCP, see “System configuration via the Web-based
Interface” on page 47 .
Note: When using HiVision network management, ensure that DHCP always
assigns the original IP address to each Switch.
Refer to “Setting up DHCP/BOOTP Server” on page 154 ) for a BOOTP/
DHCP server configuration example.
Example of a DHCP configuration file:
# /etc/dhcpd.conf for DHCP Daemon
#
subnet 149.218.112.0 netmask 255.255.240.0 {
option subnet-mask 255.255.240.0;
option routers 149.218.112.96;
}
#
# Host berta requests IP configuration
# with her MAC address
#
host berta {
hardware ethernet 00:80:63:08:65:42;
fixed-address 149.218.112,82;
}