Juniper Networks J-Series - Manual (Page 240)

Ping Host Results and Output Summary
Table 109 on page 218 summarizes the output in the ping host display. If the Services
Router receives no ping responses from the destination host, review the list after
Table 109 on page 218 for a possible explanation.
Table 109: J-Web Ping Host Results and Output Summary
Description Ping Host Result
■ bytes —Size of ping response packet, which is equal to the value you entered in
the Packet Size box, plus 8 .
■ ip-address —IP address of destination host that sent the ping response packet.
bytes bytes from ip-address
number —Sequence Number field of the ping response packet. You can use this value
to match the ping response to the corresponding ping request.
icmp_seq=0
icmp_seq=number
number —Time-to-live hop-count value of the ping response packet. ttl=number
time —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.
time=time
number —Number of ping requests (probes) sent to host. number packets transmitted
number —Number of ping responses received from host. number packets received
percentage —Number of ping responses divided by the number of ping requests,
specified as a percentage.
percentage packet loss
■ min-time —Minimum round-trip time (see time=time field in this table).
■ avg-time —Average round-trip time.
■ max-time —Maximum round-trip time.
■ std-dev —Standard deviation of the round-trip times.
round-trip min/avg/max/stddev =
min-time/avg-time/max-time/std-dev
ms
If the Services Router does not receive ping responses from the destination host (the
output shows a packet loss of 100 percent), one of the following explanations might
apply:
■ The host is not operational.
■ There are network connectivity problems between the Services Router and the
host.
■ The host might be configured to ignore ICMP echo requests.
■ The host might be configured with a firewall filter that blocks ICMP echo requests
or ICMP echo responses.
■ The size of the ICMP echo request packet exceeds the MTU of a host along the
path.
■ The value you selected in the Time-to-Live box was less than the number of hops
in the path to the host, in which case the host might reply with an ICMP error
message.
218 ■ Pinging Hosts from the J-Web Interface
J-series™ Services Router Administration Guide