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    Checking Network Routes, Addresses, and Connections Using TCP/IP Network Utilities

    To access basic network utilities for TCP/IP Networking, select Troubleshooting > Network Utilities. See Figure 1.

    Figure 1: Network Utilities Options

    Network Utilities Options

    This tool allows you to access the following options:


    Ping is a tool for checking network connectivity. The NSM4000 appliance prompts you with questions so you can focus your search. Figure 2 shows an example.

    Figure 2: Ping Utility

    Ping Utility
    • How Many Packets

      Enter the number of packets this ping command will send. The default is 5. The values range from 1-99.

    • Packet Size

      Enter the packet size (in bytes) this ping command will send. The default is 56. The values range from 1-9999.

    • How Many Sec Between Sending Each Packet

      Enter how much time (in seconds) ping should wait between sending each packet.

    • Patterns to Send (Hex)

      The data sent by ping contains a hexadecimal pattern. If you leave this option blank, ping will fill it with random data. This option is useful if you do not have problems with connectivity itself but with data loss.

    • Verbosity Output

      The NSM4000 appliance lists the ICMP packets (other than ECHO_Response) that have been received.

    • Numeric Output Only

      Check this option if you do not want any attempts to be made to look up symbolic names for host addresses.

    • Bypass Routing Tables

      If the host is not a directly attached network, an error is returned. This option can be used to ping a local host through an interface that has no route through it.


    Traceroute is a tool to print the route a packet takes to a network host. See Figure 3.

    Figure 3: Traceroute Utility

    Traceroute Utility

    Note: The only required field is Hostname. The value can be either a hostname or an IP address.


    Use the lookup tool to obtain the IP address from a hostname and the hostname from an IP address (see Figure 4). The query type drop-down list contains several types of records found in the DNS database. Enter a name server or select the default. If you choose the default, nslookup uses the server on which the NSM4000 appliance is installed.

    Figure 4: Lookup Utility

    Lookup Utility

    IP Subnet Calculator

    Use the IP subnet calculator to calculate the netmask for a TCP/IP network. You can calculate a netmask by class and subnet bits or by the number of hosts (see Figure 5). When you calculate a netmask by the number of hosts, the NSM4000 appliance returns the smallest network available.

    Figure 5: IP Subnet Calculator

    IP Subnet Calculator

    Published: 2014-10-30