Installation guide

Switch Services
5-15
3. Refer to the Interfaces field for the names of the interfaces available to route information between
the DHCP Server and DHCP clients. If this information is insufficient, consider creating a new IP pool
or edit an existing pool.
4. Refer to the Gateway Information field for DHCP Server and Gateway Interface IP addresses.
Ensure these address are not in conflict with the addresses used to route data between the DHCP
Server and client.
5. Click the Edit button to modify the properties displayed for an existing DHCP relay configuration.
Refer to step 7 for editable properties for the DHCP relay.
6. To delete a relay interface, highlight it from those available and click the Delete button.
7. Click the Add button to create a new DHCP relay for a specific switch VLAN interface.
a. Use the Interface drop-down menu to assign the interface for the DHCP relay. As VLANs are
added to the switch, the number of available interfaces grows.
b. Add Servers as needed based on the availability of external DHCP servers. As Servers are
added, use the Gateway drop-down menu (associated with each Server) to supply the interface
on which this external DHCP server can be reached.
c. Click OK to save and add the changes to the running configuration and close the dialog.
d. Click Cancel to close the dialog without committing updates to the running configuration.
5.2.5 Viewing DDNS Bindings
The DDNS Bindings tab displays mappings between client IP addresses and domain names. DDNS keeps a
domain name linked to a changing IP address. Typically, when a user connects to a network, the user’s ISP
assigns an unused IP address from a pool of IP addresses (usually done through a DHCP server). This address
is only valid for a limited time. The mechanism of dynamically assigning IP addresses increases the pool of
NOTE The gateway address should not be set to a VLAN interface used by the switch.
NOTE The interface VLAN and gateway interface should have their IP addresses set. The
interface VLAN and gateway interface should not have DHCP client or DHCP
Server enabled. DHCP packets cannot be relayed to an onboard DHCP Server. The
interface VLAN and gateway interface cannot be the same.