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Sample Task—Ping Host

Figure 1 shows a sample Ping Host page. In this example, you are sending ping requests are sent to two destination hosts—10.10.2.2 and 10.10.10.10. The echo requests reaches 10.10.2.2 and does not reach 10.10.10.10.

To ping the host:

  1. Select Troubleshoot>Ping Host from the task bar.
  2. Next to Advanced options, click the expand icon (see Figure 1).
  3. Next to Remote Host, typ 10.10.2.2 to specify the host's IP address.
  4. Retain the default values in the following fields:
    • Interface—any—Ping requests to be sent on all interfaces.
    • Count—10—Number of ping requests to send.
    • Type-of-Service—0—TOS value in the IP header of the ping request packet.
    • Routing Instance—default—Routing instance name for the ping attempt.
    • Interval—1—Interval, in seconds, between the transmission of each ping request.
    • Packet Size—56—Size of the ping request packet in bytes. The routing platform adds 8 bytes of ICMP header to this size before sending it.
    • Time-to-Live—32—TTL hop count for the ping request packet.
  5. Click Start.
  6. Repeat Steps 2 through 5 to ping destination host 10.10.10.10.

Figure 1: Ping Host Troubleshoot Page

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Figure 2 displays the results of a successful ping in the main pane, and Table 1 provides a summary of the ping host results and output.

Figure 2: Successful Ping Host Results Page

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Table 1: J-Web Ping Host Results and Output Summary

Ping Host Result

Description

64 bytes from

Size of ping response packet, which is equal to the default value in the Packet Size box (56), plus 8.

10.10.2.2

IP address of the destination host that sent the ping response packet.

icmp_seq=number

Sequence numbers of packets from 0 through 9. You can use this value to match the ping response to the corresponding ping request.

ttl=56

Time-to-live hop-count value of the ping response packet.

259.730 ms

Total time between the sending of the ping request packet and the receiving of the ping response packet, in milliseconds. This value is also called round-trip time.

10 packets transmitted, 10 packets received, 0% packet loss

Ping packets transmitted, received, and lost. 10 ping requests (probes) were sent to the host, and 10 ping responses were received from the host. No packets were lost.

257.492/269.512/365.037/31.865 ms

  • 257.492—Minimum round-trip time
  • 269.51—Average round-trip time
  • 365.03—Maximum round-trip time
  • 31.865—Standard deviation of the round-trip times
  • ms—milliseconds

Figure 3 shows the output of an unsuccessful ping. There can be different reasons for an unsuccessful ping. This result shows that the local router did not have a route to the host 10.10.10.10 and thus could not reach it.

Figure 3: Unsuccessful Ping Host Results Page

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Published: 2010-04-29

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