Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 461

CONFIGURATION mode Dell(conf)#ip tcp reduced-syn-ack-wait You can use the no ip tcp reduced-syn-ack-wait command to restore the default behavior, which causes the wait period to be set as 8 seconds. 2. View the interval that you configured for the device to wait before the TCP connection is attempted to be established. EXEC mode Dell>show ip tcp reduced-syn-ack-wait Enabling Directed Broadcast By default, Dell Networking OS drops directed broadcast packets destined for an interface. This default setting 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 mode ip directed-broadcast To view the configuration, use the show config command in INTERFACE mode. Resolution of Host Names Domain name service (DNS) maps host names to IP addresses. This feature simplifies such commands as Telnet 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 system resolves 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 Traceroute In the release 9.4.(0.0), the Name server, Domain name, and Domain list are VRF specific. The maximum number of Name servers and Domain lists per VRF is six. Enabling Dynamic Resolution of Host Names By default, dynamic resolution of host names (DNS) is disabled. To enable DNS, use the following commands. • Enable dynamic resolution of host names. CONFIGURATION mode ip domain-lookup • Specify up to six name servers. IPv4 Routing 461