Enabling Directed BroadcastBy default, Dell Networking OS drops directed broadcast packets destined for an interface. This defaultsetting provides some protection against denial of service (DoS) attacks.To enable Dell Networking OS to receive directed broadcasts, use the following command.• Enable directed broadcast.INTERFACE modeip directed-broadcastTo view the configuration, use the show config command in INTERFACE mode.Resolution of Host NamesDomain name service (DNS) maps host names to IP addresses. This feature simplifies commands such asTelnet and FTP by allowing you to enter a name instead of an IP address.Dynamic resolution of host names is disabled by default. Unless you enable the feature, the systemresolves only host names entered into the host table with the ip host command.The following sections describe DNS and the resolution of host names.• Enabling Dynamic Resolution of Host Names• Specifying the Local System Domain and a List of Domains• Configuring DNS with TracerouteName server, Domain name, and Domain list are VRF specific. The maximum number of Name serversand Domain lists per VRF is six.Enabling Dynamic Resolution of Host NamesBy default, dynamic resolution of host names (DNS) is disabled.To enable DNS, use the following commands.• Enable dynamic resolution of host names.CONFIGURATION modeip domain-lookup• Specify up to six name servers.CONFIGURATION modeip name-server ip-address [ip-address2 ... ip-address6]The order you entered the servers determines the order of their use.Example of the show hosts CommandTo view current bindings, use the show hosts command.Dell>show hostDefault domain is force10networks.comName/address lookup uses domain serviceName servers are not setIPv4 Routing 425
