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    ping

    Syntax

    ping host<bypass-routing><count requests><detail> <do-not-fragment> <inet | inet6><interface source-interface><interval seconds><logical-system (all | logical-system-name)><loose-source value><no-resolve><pattern string> <rapid> <record-route><routing-instance routing-instance-name><size bytes> <source source-address><strict ><strict-source value.><tos type-of-service><ttl value><verbose><wait seconds>

    Syntax (QFX Series)

    ping host<bypass-routing><count requests><detail> <do-not-fragment> <inet><interface source-interface><interval seconds><loose-source value><mac-address mac-address><no-resolve><pattern string> <rapid> <record-route><routing-instance routing-instance-name><size bytes> <source source-address><strict>< strict-source value><tos type-of-service><ttl value><verbose><wait seconds>

    Release Information

    Command introduced before Junos OS Release 7.4.

    Command introduced in Junos OS Release 9.0 for EX Series switches.

    Command introduced in Junos OS Release 11.1 for the QFX Series.

    Description

    Check host reachability and network connectivity. The ping command sends Internet Control Message Protocol (ICMP) ECHO_REQUEST messages to elicit ICMP ECHO_RESPONSE messages from the specified host. Type Ctrl+c to interrupt a ping command.

    Options

    host
    		—

    IP address or hostname of the remote system to ping.

    bypass-routing
    		—

    (Optional) Bypass the normal routing tables and send ping requests directly to a system on an attached network. If the system is not on a directly attached network, an error is returned. Use this option to ping a local system through an interface that has no route through it.

    count requests
    		—

    (Optional) Number of ping requests to send. The range of values is 1 through 2,000,000,000. The default value is an unlimited number of requests.

    detail
    		—

    (Optional) Include in the output the interface on which the ping reply was received.

    do-not-fragment
    		—

    (Optional) Set the do-not-fragment (DF) flag in the IP header of the ping packets. For IPv6 packets, this option disables fragmentation.

    Note: In Junos OS Release 11.1 and later, when issuing the ping command for an IPv6 route with the do-not-fragment option, the maximum ping packet size is calculated by subtracting 48 bytes (40 bytes for the IPV6 header and 8 bytes for the ICMP header) from the MTU. Therefore, if the ping packet size (including the 48-byte header) is greater than the MTU, the ping operation might fail.

    inet
    		—

    (Optional) Ping Packet Forwarding Engine IPv4 routes.

    inet6
    		—

    (Optional) Ping Packet Forwarding Engine IPv6 routes.

    interface source-interface
    		—

    (Optional) Interface to use to send the ping requests.

    interval seconds
    		—

    (Optional) How often to send ping requests. The range of values, in seconds, is 1 through infinity. The default value is 1.

    loose-source value
    		—

    (Optional) Intermediate loose source route entry (IPv4). Open a set of values.

    mac-address mac-address
    		—

    (Optional) Ping the physical or hardware address of the remote system you are trying to reach.

    no-resolve
    		—

    (Optional) Do not attempt to determine the hostname that corresponds to the IP address.

    pattern string
    		—

    (Optional) Specify a hexadecimal fill pattern to include in the ping packet.

    rapid
    		—

    (Optional) Send ping requests rapidly. The results are reported in a single message, not in individual messages for each ping request. By default, five ping requests are sent before the results are reported. To change the number of requests, include the count option.

    record-route
    		—

    (Optional) Record and report the packet’s path (IPv4).

    routing-instance routing-instance-name
    		—

    (Optional) Name of the routing instance for the ping attempt.

    size bytes
    		—

    (Optional) Size of ping request packets. The range of values, in bytes, is 0 through 65,468. The default value is 56, which is effectively 64 bytes because 8 bytes of ICMP header data are added to the packet.

    source source-address
    		—

    (Optional) IP address of the outgoing interface. This address is sent in the IP source address field of the ping request. If this option is not specified, the default address is usually the loopback interface (lo.0).

    strict
    		—

    (Optional) Use the strict source route option (IPv4).

    strict-source value
    		—

    (Optional) Intermediate strict source route entry (IPv4). Open a set of values.

    tos type-of-service
    		—

    (Optional) Set the type-of-service (ToS) field in the IP header of the ping packets. The range of values is 0 through 255.

    ttl value
    		—

    (Optional) Time-to-live (TTL) value to include in the ping request (IPv6). The range of values is 0 through 255.

    verbose
    		—

    (Optional) Display detailed output.

    vpls instance-name
    		—

    (Optional) Ping the instance to which this VPLS belongs.

    wait seconds
    		—

    (Optional) Maximum wait time, in seconds, after the final packet is sent. If this option is not specified, the default delay is 10 seconds. If this option is used without the count option, a default count of 5 packets is used.

    Required Privilege Level

    network

     

    Related Documentation

     

    List of Sample Output

    ping hostname
    ping hostname size count
    ping hostname rapid

    Output Fields

    When you enter this command, you are provided feedback on the status of your request. An exclamation point (!) indicates that an echo reply was received. A period (.) indicates that an echo reply was not received within the timeout period. An x indicates that an echo reply was received with an error code. These packets are not counted in the received packets count. They are accounted for separately.

    Sample Output

    ping hostname

    user@host> ping skye
    PING skye.net (192.168.169.254): 56 data bytes
64 bytes from 192.168.169.254: icmp_seq=0 ttl=253 time=1.028 ms
64 bytes from 192.168.169.254: icmp_seq=1 ttl=253 time=1.053 ms
64 bytes from 192.168.169.254: icmp_seq=2 ttl=253 time=1.025 ms
64 bytes from 192.168.169.254: icmp_seq=3 ttl=253 time=1.098 ms
64 bytes from 192.168.169.254: icmp_seq=4 ttl=253 time=1.032 ms
64 bytes from 192.168.169.254: icmp_seq=5 ttl=253 time=1.044 ms
^C [abort]

    ping hostname size count

    user@host> ping skye size 200 count 5
    PING skye.net (192.168.169.254): 200 data bytes
208 bytes from 192.168.169.254: icmp_seq=0 ttl=253 time=1.759 ms
208 bytes from 192.168.169.254: icmp_seq=1 ttl=253 time=2.075 ms
208 bytes from 192.168.169.254: icmp_seq=2 ttl=253 time=1.843 ms
208 bytes from 192.168.169.254: icmp_seq=3 ttl=253 time=1.803 ms
208 bytes from 192.168.169.254: icmp_seq=4 ttl=253 time=17.898 ms

--- skye.net ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 1.759/5.075/17.898 ms

    ping hostname rapid

    user@host> ping skye rapid 
    PING skye.net (192.168.169.254): 56 data bytes
!!!!!
--- skye.net ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.956/0.974/1.025/0.026 ms

    Published: 2013-11-18

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