Dynamic Host Configuration Protocol | 321Figure 13-4. Configuring Dell Force10 Systems as a DHCP Relay DeviceTo view the ip helper-address configuration for an interface, use the command show ip interface fromEXEC privilege mode, Figure 250.Figure 13-5. Displaying the Helper Address ConfigurationConfigure Secure DHCPDHCP as defined by RFC 2131 provides no authentication or security mechanisms. Secure DHCP is asuite of features that protects networks that use dynamic address allocation from spoofing and attacks.• Option 82 on page 322DHCP 001R1(conf-if-gi-1/3)#show config!interface GigabitEthernet 1/3ip address 10.11.0.3/24ip helper-address 10.11.1.5ip helper-address 10.11.2.5no shutdown1/3Unicast DHCP Server10.11.1.5DHCP Server10.11.2.5BroadcastSource IP : 10.11.1.5Destination IP: 255.255.255.255Source Port: 67Destination Port: 68UnicastSource IP : 0.0.0.0Destination IP: 10.11.1.5Source Port: 68Destination Port: 67Relay Agent Address: 10.11.0.31/4UnicastSource IP : 10.11.1.5Destination IP: 10.11.0.3Source Port: 67Destination Port: 68BroadcastSource IP : 0.0.0.0Destination IP: 255.255.255.255Source Port: 68Destination Port: 67Relay Agent Address: 0.0.0.0R1_E600#show ip int gig 1/3GigabitEthernet 1/3 is up, line protocol is downInternet address is 10.11.0.1/24Broadcast address is 10.11.0.255Address determined by user inputIP MTU is 1500 bytesHelper address is 192.168.0.1192.168.0.2Directed broadcast forwarding is disabledProxy ARP is enabledSplit Horizon is enabledPoison Reverse is disabledICMP redirects are not sentICMP unreachables are not sent
