ip domain-list nameConfigure this command up to six times to specify a list of possible domain names. Dell Networking OS searches the domainnames in the order they were configured until a match is found or the list is exhausted.Configuring DNS with TracerouteTo configure your switch to perform DNS with traceroute, 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.• When you enter the traceroute command without specifying an IP address (Extended Traceroute), you are promptedfor a target and source IP address, timeout in seconds (default is 5), a probe count (default is 3), minimum TTL (default is 1),maximum TTL (default is 30), and port number (default is 33434).CONFIGURATION modetraceroute [host | ip-address]To keep the default setting for these parameters, press the ENTER key.Example of the traceroute CommandThe following text is example output of DNS using the traceroute command.Dell#traceroute www.force10networks.comTranslating "www.force10networks.com"...domain server (10.11.0.1) [OK]Type Ctrl-C to abort.----------------------------------------------------------------------Tracing the route to www.force10networks.com (10.11.84.18), 30 hops max, 40 byte packets----------------------------------------------------------------------TTL Hostname Probe1 Probe2 Probe31 10.11.199.190 001.000 ms 001.000 ms 002.000 ms2 gwegress-sjc-02.force10networks.com (10.11.30.126) 005.000 ms 001.000 ms 001.000 ms3 fw-sjc-01.force10networks.com (10.11.127.254) 000.000 ms 000.000 ms 000.000 ms4 www.dell.com (10.11.84.18) 000.000 ms 000.000 ms 000.000 msDell#ARPDell Networking OS uses two forms of address resolution: address resolution protocol (ARP) and Proxy ARP.ARP runs over Ethernet and enables endstations to learn the MAC addresses of neighbors on an IP network. Over time, DellNetworking OS creates a forwarding table mapping the MAC addresses to their corresponding IP address. This table is called theARP Cache and dynamically learned addresses are removed after a defined period of time.For more information about ARP, refer to RFC 826, An Ethernet Address Resolution Protocol.In Dell Networking OS, Proxy ARP enables hosts with knowledge of the network to accept and forward packets from hosts thatcontain no knowledge of the network. Proxy ARP makes it possible for hosts to be ignorant of the network, including subnetting.IPv4 Routing 409
