3Com 4007, Implementation Manual, Page: 623 / 684

traceRoute 623
Strategies for Using
Ping
Follow these strategies for using ping:
■
Ping devices when your network is operating normally so that you
have a performance baseline for comparison.
■
Ping by IP address when:
■
You want to test devices on different subnetworks. This method
allows you to ping your network segments in an organized way,
rather than having to remember all the hostnames and locations.
■
Your DNS server is down and your system cannot look up host
names properly. You can ping with IP addresses even if you
cannot access hostname information.
■
Ping by hostname when you want to identify DNS server problems.
■
To troubleshoot problems involving large packet sizes, ping the
remote host repeatedly, increasing the packet size each time.
traceRoute
Use the traceRoute feature to track the route of an IP packet through the
network. TraceRoute information includes all of the nodes in the network
through which a packet passes to get from its origin to its destination.
The traceRoute feature uses the IP time-to-live (TTL) field in User
Datagram Protocol (UDP) probe packets to elicit an ICMP Time Exceeded
message from each gateway to a particular host.
traceRoute is implemented for the Multilayer Switching Modules of the
Switch 4007 system.
Using traceRoute The system provides two traceRoute functions:
■
traceRoute — Uses the hostname or IP address to trace a route to a
host with default options
■
advancedTraceRoute — Uses the hostname or IP address to trace a
route to a host with the advanced traceRoute options that you specify