Chapter 32 DHCP
32.2 DHCP Status
Click IP Application > DHCP in the navigation panel. The DHCP Status screen displays.
Figure 156 IP Application > DHCP Status
The following table describes the labels in this screen.
Table 95 IP Application > DHCP
LABEL | DESCRIPTION |
Relay Mode | This field displays: |
•None - if the Switch is not configured as a DHCP relay agent.
•Global - if the Switch is configured as a DHCP relay agent only.
•VLAN - followed by a VLAN ID if it is configured as a relay agent for specific VLAN(s).
32.3DHCP Relay
Configure DHCP relay on the Switch if the DHCP clients and the DHCP server are not in the same broadcast domain. During the initial IP address leasing, the Switch helps to relay network information (such as the IP address and subnet mask) between a DHCP client and a DHCP server. Once the DHCP client obtains an IP address and can connect to the network, network information renewal is done between the DHCP client and the DHCP server without the help of the Switch.
The Switch can be configured as a global DHCP relay. This means that the Switch forwards all DHCP requests from all domains to the same DHCP server. You can also configure the Switch to relay DHCP information based on the VLAN membership of the DHCP clients.
32.3.1 DHCP Relay Agent Information
The Switch can add information about the source of client DHCP requests that it relays to a DHCP server by adding Relay Agent Information. This helps provide authentication about the source of the requests. The DHCP server can then provide an IP address based on this information. Please refer to RFC 3046 for more details.
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