Reference Guide

266 | IPv4 Routing
www.dell.com | support.dell.com
Figure 14-6 shows an example output of DNS using the traceroute command.
Figure 14-6. Traceroute Command Example
Addess Resolution Protocol (ARP)
FTOS uses two forms of address resolution: ARP and proxy ARP.
ARP runs over Ethernet and enables endstations to learn the MAC addresses of neighbors on an IP
network. Over time, FTOS creates a forwarding table mapping the MAC addresses to their corresponding
IP address. This table is called ARP cache. 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.
traceroute [host | ip-address ]
CONFIGURATION 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)
• port number (default is 33434).
To keep the default setting for those parameters, press the
ENTER key.
Command Syntax Command Mode Purpose
FTOS#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.force10networks.com (10.11.84.18) 000.000 ms 000.000 ms 000.000 ms
FTOS#