ECS4100 Series Web Management Guide-R07

Table Of Contents
Chapter 19
| IP Services
Dynamic Host Configuration Protocol
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DHCP response back to the DHCP relay agent (i.e., this switch). This switch then
passes the DHCP response received from the server to the client.
Figure 478: Layer 3 DHCP Relay Service
Command Usage
You must specify the IP address for at least one active DHCP server. Otherwise,
the switchs DHCP relay agent will not be able to forward client requests to a
DHCP server. Up to five DHCP servers can be specified in order of preference.
If any of the specified DHCP server addresses are not located in the same
network segment with this switch, specify the default router through which
this switch can reach other IP subnetworks using the IP > Routing > Static
Routes (Add) page (see Configuring Static Routes” on page 676) or the IP >
IPv6 Configuration (Configure Global) page (see Configuring the IPv6 Default
Gateway” on page 653).
DHCP relay configuration will be disabled if an active DHCP server is detected
on the same network segment.
Parameters
These parameters are displayed:
VLAN ID – ID of configured VLAN.
Server IP Address – Addresses of DHCP servers or relay servers to be used by
the switchs DHCP relay agent in order of preference.
Restart DHCP Relay – Use this button to re-initialize DHCP relay service.
Web Interface
To configure DHCP relay service:
1. Click IP Service, DHCP, Relay (just below Client)
2. Enter up to five IP addresses for DHCP servers or relay servers in order of
preference for any VLAN.
3. Click Apply.
Provides IP address
compatible with switch
segment to which client
is attached
DHCP
Server