User manual
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A trusted port is a port that is directly or indirectly connected to a legitimate DHCP server. Trust port on
the received DHCP message normal forwarding, thus ensuring the DHCP client to get the correct IP
address.
Distrust ports are ports that are not connected to the legitimate DHCP server. The DHCP-ACK,
DHCP-NAK, and DHCP-OFFER packets that are received by the DHCP server in response to the never
trusted port will be discarded, thus preventing the DHCP client from getting the wrong IP address.
(Figure 6.6.6.3)
Port configuration steps:
Step 1: in the corresponding port after the Trust check box check box;
Step 2: in the corresponding port after the Trust-DAI check box check box;
Step 3: in the corresponding port after the Trust-IPSG check box check box;
Step 4: in the corresponding port after the Policy (Op82) drop-down box selection;
Step 5: select the Circuit-type drop-down box at the end of the corresponding port;
Step 6: fill in ID in the Circuit-id text box in the corresponding port;
Step 7: select the Remote-type drop-down box at the end of the corresponding port;
Step 8: fill in ID in the Remote-id text box in the corresponding port;
Step 9: click the "Apply" button.
6.6.7 DNS configuration
DNS, Domain Name System. DNS to help users find the path on the internet. Every computer on the
Internet has a unique address, called "IP" ". IP address (as a string of digits) is not convenient memory,
DNS allows users to use a string of common letters (domain name) to replace.
In the menu bar in order to click on the "main menu", "advanced configuration", "DNS configuration" into
the DNS configuration interface, the interface can be configured with the main DNS and standby DNS.