Juniper Networks J-Series manual Ping Host Results and Output Summary, Icmpseq=0 Icmpseq=number

J-series™ Services Router Administration Guide

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

Ping Host Result

bytes bytes from ip-address

icmp_seq=0

icmp_seq=number

ttl=number

time=time

number packets transmitted

number packets received

percentage packet loss

round-trip min/avg/max/stddev = min-time/avg-time/max-time/std-dev ms

Description

■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.

number—Sequence Number field of the ping response packet. You can use this value to match the ping response to the corresponding ping request.

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

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.

number—Number of ping requests (probes) sent to host.

number—Number of ping responses received from host.

percentage—Number of ping responses divided by the number of ping requests, specified as a percentage.

■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.

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