Administrator Guide

• 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.
Example of the traceroute Command
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
Dell 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, Dell Networking OS 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.
In Dell Networking OS, 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.
368
IPv4 Routing