6.3 Diagnostics—Traceroute (IPv4)

The Traceroute (IPv4) page allows you to perform a traceroute test over IPv4 towards a remote host. Traceroute is a diagnostic tool for displaying the route and measuring transit delays of packets across an IPv4 network.

Figure 6-5. Traceroute (IPv4)

You can configure the following parameters for the test:

  • Hostname or IP Address: The destination IP Address
  • DSCP Value: This value is used for the DSCP value in the IPv4 header. The default value is 0. The valid range is 0–63.
  • Number of Probes Per Hop: Determines the number of probes (packets) sent for each hop. The default value is 3. The valid range is 1–60.
  • Response Timeout: Determines the number of seconds to wait for a reply to a sent request. The default number is 3. The valid range is 1–86400.
  • First TTL Value: Determines the value of the TTL field in the IPv4 header in the first packet sent. The default number is 1. The valid range is 1–30.
  • Max TTL Value: Determines the maximum value of the TTL field in the IPv4 header. If this value is reached before the specified remote host is reached the test stops. The default number is 30. The valid range is 1–255.
  • VID for Source Interface: This field is used to force the test to use a specific local VLAN interface as the source interface. Leave this field empty for automatic selection based on routing configuration.
    Note: You may only specify either the VID or the IP Address for the source interface.
  • IP Address for Source Interface: This field is used to force the test to use a specific local interface with the specified IP address as the source interface. The specified IP address must be configured on a local interface. Leave this field empty for automatic selection based on routing configuration.
    Note: You may only specify either the VID or the IP Address for the source interface.
  • Use ICMP instead of UDP: By default, the traceroute command uses UDP datagrams. Selecting this option forces it to use ICMP ECHO packets instead.
  • Print Numeric Address: By default, the traceroute command prints out hop information using a reverse DNS lookup for the acquired host IP addresses. This may slow down the display if the DNS information is not available. Selecting this option prevents the reverse DNS lookup and forces the traceroute command to print numeric IP addresses.