ECS3510-28T_Management Guide-R05

C HAPTER 13 | Security Measures
DHCP Snooping
– 412 –
■
IP Address – Inserts an IP address in the remote ID sub-option for
the DHCP snooping agent (i.e., the IP address of the management
interface). This attribute can be encoded in Hexadecimal or ASCII.
■
string - An arbitrary string inserted into the remote identifier field.
(Range: 1-32 characters)
◆ DHCP Snooping Information Option Policy – Specifies how to
handle DHCP client request packets which already contain Option 82
information.
■
Drop – Drops the client’s request packet instead of relaying it.
■
Keep – Retains the Option 82 information in the client request, and
forwards the packets to trusted ports.
■
Replace – Replaces the Option 82 information circuit-id and
remote-id fields in the client’s request with information about the
relay agent itself, inserts the relay agent’s address (when DHCP
snooping is enabled), and forwards the packets to trusted ports.
(This is the default policy.)
WEB INTERFACE
To configure global settings for DHCP Snooping:
1. Click IP Service, DHCP, Snooping.
2. Select Configure Global from the Step list.
3. Select the required options for the general DHCP snooping process and
for the DHCP snooping information policy.
4. Click Apply
Figure 225: Configuring Global Settings for DHCP Snooping