76343/4/5 | English, Revision 05 | Date: 23.02.2022
57
Bridge Modes – Chapter 6
6.2.2 DHCP Server Settings
Figure 48
Bridge Modes: DHCP server
settings
The DHCP server offers the
following parameters after ac
-
tivation.
IP Range start (end)
: The IP
addresses for LAN clients are
offered in the range specified
with these 2 IP addresses.
Lease Time
: The time in sec
-
onds after which an IP ad
-
dress must be confirmed
again. This renewal is trig
-
gered by the LAN client.
DNS IP
: The DHCP server usu
-
ally also provides the IP ad
-
dress of one or more DNS
servers with the IP address.
These DNS servers can be de
-
fined here. If no information is entered here, the DHCP server retrieves the DNS in
-
formation from the WLAN interface and transmits it to the LAN clients.
6.2.3 Static DHCP Server entries
Figure 49
Bridge Modes: Static DHCP
server entries
To ensure that LAN clients are
always assigned the same IP
address after switching on the
HG G
76343/4/5 or the entire
system, you can reserve IP ad
-
dresses from the IP range de
-
fined above in this table via
the MAC address of the LAN
client or via the device name
that is sent in the DHCP re
-
quest.
A maximum of 50 entries can be managed.
Advantages of the NAT mode:
1.
Almost any number of LAN clients can be connected to a HG G
2.
In the WLAN the HG G
76343/4/5 and all LAN clients appear under a single IP
address.
3.
If in a project there are several units consisting of a HG G
76343/4/5 and con
-
nected LAN clients the configuration is the same for all units. Only the IP
address of each HG G
76343/4/5 towards the WLAN has to be individual.
4.
In a way the LAN clients are better protected against unwanted access since
the HG G
76343/4/5 only forwards data for the specified ports.
5.
Local broadcast packets (on the LAN side of the HG G
76343/4/5) are not sent
over the WLAN.
