Dell PowerSwitch S4112F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 493
View DHCP Information, System domain name and list
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This option secures all DHCP traffic that goes through a DHCP relay agent, and ensures that communication between the DHCP relay agent and the DHCP server is not compromised. The DHCP relay agent inserts Option 82 before forwarding DHCP packets to the DHCP server. The DHCP server includes Option 82 back in its response to the relay agent. The relay agent uses this information to forward a reply out the interface on which the request was received rather than flooding it on the entire VLAN. However, the relay agent removes Option 82 from its DHCP responses before forwarding the responses to the client. NOTE: Option 82 is supported, but not configurable. View DHCP Information Use the show ip dhcp binding command to view the DHCP binding table entries. View DHCP Binding Table OS10# show ip dhcp binding IP Address Hardware address Lease expiration Hostname 11.1.1.254 00:00:12:12:12:12 Jan 27 2016 06:23:45 Total Number of Entries in the Table = 1 System domain name and list If you enter a partial domain, the system searches different domains to finish or fully qualify that partial domain. A fully qualified domain name (FQDN) is any name that terminates with a period or dot. OS10 searches the host table first to resolve the partial domain. The host table contains both statically configured and dynamically learned host and IP addresses. If OS10 cannot resolve the domain, it tries the domain name assigned to the local system. If that does not resolve the partial domain, the system searches the list of domains configured. You can configure the ip domain-list command up to five times to enter a list of possible domain names. The system searches the domain names in the order they were configured until a match is found or the list is exhausted. 1 Enter a domain name in CONFIGURATION mode (up to 64 alphanumeric characters). ip domain-name name 2 Add names to complete unqualified host names in CONFIGURATION mode. ip domain-list name Configure local system domain name and list OS10(config)# ip domain-name ntengg.com OS10(config)# ip domain-list dns1 OS10(config)# ip domain-list dns2 OS10(config)# ip domain-list dns3 OS10(config)# ip domain-list dns4 OS10(config)# ip domain-list dns5 View local system domain name information OS10# show running-configuration ! Version 10.2.9999E ! Last configuration change at Feb 20 04:50:33 2017 ! username admin password $6$q9QBeYjZ$jfxzVqGhkxX3smxJSH9DDz7/3OJc6m5wjF8nnLD7/VKx8SloIhp4NoGZs0I/ UNwh8WVuxwfd9q4pWIgNs5BKH. System management 493