Dell NetWorker 19.9 Administration Guide

Verifying network connectivity

Use the ping command and the traceroute command on UNIX and Linux, or the pathping command on Windows, to transmit packets between hosts and verify that network connectivity exists between the source and the destination hosts. Run each command from the source host and destination host and use each command with the shortname, FQDN, and the IP address of the destination host.

1. On the pwd.emc.com host, run the following pathping commands:

   pathping pwd.corp.com
   pathping pwd
   pathping 10.1.1.20
   pathping mnd.corp.com
   pathping mnd
   pathping 10.1.1.10

   A successful pathping command displays the following information:

   C:>pathping mnd.corp.com
   Tracing route to mnd.emc.com [10.1.1.10]
   over a maximum of 30 hops:
     0  pwd.corp.com [10.1.1.20]
     1  mnd.corp.com [10.1.1.10]
   Computing statistics for 25 seconds...
               Source to Here   This Node/Link
   Hop  RTT    Lost/Sent = Pct  Lost/Sent = Pct  Address
     0                                           pwd.corp.com [10.1.1.20]
                                   0/ 100 =  0%   |
     1    0ms     0/ 100 =  0%     0/ 100 =  0%  mnd.corp.com [10.1.1.10]
   Trace complete.

   An unsuccessful pathping command displays the following information:

   C:>pathping 10.1.1.10
   Tracing route to 10.1.1.10 over a maximum of 30 hops
     0  pwd.corp.com [10.10.10.20]
     1     *        *        *
   Computing statistics for 0 seconds...
               Source to Here   This Node/Link
   Hop  RTT    Lost/Sent = Pct  Lost/Sent = Pct  Address
     0                                           pwd.corp.com [10.10.10.20]
   Trace complete.

2. Complete the following steps on the mnd.corp.com host:
   1. Run the following ping commands:

      ping pwd.corp.com
      ping pwd
      ping 10.1.1.20
      ping mnd.corp.com
      ping mnd
      ping 10.1.1.10

   2. Run the following traceroute commands:

      traceroute pwd.corp.com
      traceroute pwd
      traceroute 10.1.1.20
      traceroute mnd.corp.com
      traceroute mnd
      traceroute 10.1.1.10

      Ensure that each ping and traceroute command succeeds. Lost packets can indicate a slow connection between hosts. If any try to transmit a packet fails with an error message, then verify the name resolution and ensure that all routers between the source host and destination hosts are operational.