Reference Guide

● Enter up to 63 characters to configure names to complete unqualified host names.
CONFIGURATION mode
ip domain-list name
Configure this command up to six times to specify 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.
Configuring DNS with Traceroute
To configure your switch to perform DNS with traceroute, use the following commands.
● Enable dynamic resolution of host names.
CONFIGURATION mode
ip domain-lookup
● Specify up to six name servers.
CONFIGURATION mode
ip 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
prompted for 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 mode
traceroute [host | ip-address]
To keep the default setting for these parameters, press the ENTER key.
The following text is example output of DNS using the traceroute command.
Dell#traceroute www.force10networks.com
Translating "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 Probe3
1 10.11.199.190 001.000 ms 001.000 ms 002.000 ms
2 gwegress-sjc-02.force10networks.com (10.11.30.126) 005.000 ms 001.000 ms 001.000 ms
3 fw-sjc-01.force10networks.com (10.11.127.254) 000.000 ms 000.000 ms 000.000 ms
4 www.dell.com (10.11.84.18) 000.000 ms 000.000 ms 000.000 ms
Dell#
ARP
The system 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, the
system creates a forwarding table mapping the MAC addresses to their corresponding IP address. This table is called the ARP
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.
Proxy ARP enables hosts with knowledge of the network to accept and forward packets from hosts that contain no knowledge
of the network. Proxy ARP makes it possible for hosts to be ignorant of the network, including subnetting.
For more information about Proxy ARP, refer to RFC 925, Multi-LAN Address Resolution, and RFC 1027, Using ARP to
Implement Transparent Subnet Gateways.
IPv4 Routing
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