Manual:Tools/Ping
Applies to RouterOS: v3, v4, v5 +
Contents
Summary
Ping uses Internet Control Message Protocol (ICMP) Echo messages to determine if a remote host is active or inactive and to determine the round-trip delay when communicating with it. Ping tool sends ICMP (type 8) message to the host and waits for the ICMP echo-reply (type 0). The interval between these events is called round trip. If the response (that is called pong) has not come until the end of the interval, we assume it has timed out. The second significant parameter reported is ttl (Time to Live). Is is decremented at each machine in which the packet is processed. The packet will reach its destination only when the ttl is greater than the number of routers between the source and the destination.
Properties
Command: /ping [address] [properties]
Ping tool can be used to ping IP address and mac address. Mac ping works only to devices that has mac ping server configured. Read more>>
| Property | Description |
|---|---|
| arp-ping (yes | no; Default: ) | |
| count (integer [0..4294967295]; Default: 0) | Total number of packets to send (defult is to send forever until interrupted). |
| do-not-fragment (; Default: ) | If do-not-fragment flag is set packets will not be fragmented if size exceeds interface mtu. |
| interface (string; Default: ) | Which interface to use (required when pinging IPv6 address) |
| interval (time [10ms..5s]; Default: 1s) | how long to wait for response. If no response is received within 1000ms, ping will show as "timed out", but if you will receive a response after 3ms, still the ping program will wait the rest of 997ms until it sends next ping. |
| routing-table (string; Default: main) | Which routing table to use to resolve destination. Used in VRF setups. |
| size (integer; Default: 64) | Packet size to be used in bytes (includes payload and IP header) |
| src-address (IPv4,IPv6; Default: ) | IPv4/IPv6 address to be set as packets source. Useful if replies must be sent to specific address. |
| ttl (integer [1..255]; Default: ) | Time to live parameter adjustment |
Note: If DNS is configured, then DNS name can be used to ping destination
Examples
Ping IP address
[admin@dzeltenais_burkaans] > /ping 10.1.101.3
HOST SIZE TTL TIME STATUS
10.1.101.3 56 64 3ms
10.1.101.3 56 64 10ms
10.1.101.3 56 64 7ms
sent=3 received=3 packet-loss=0% min-rtt=3ms avg-rtt=6ms max-rtt=10ms
[admin@dzeltenais_burkaans] > /ping 10.1.101.9
HOST SIZE TTL TIME STATUS
timeout
timeout
timeout
sent=3 received=0 packet-loss=100%
It is also possible to ping multicast address to discover all hosts belongign to multicast group:
[admin@dzeltenais_burkaans] > /ping ff02::1
HOST SIZE TTL TIME STATUS
fe80::20c:42ff:fe49:fceb 56 64 1ms echo reply
fe80::20c:42ff:fe72:a1b0 56 64 1ms echo reply
fe80::20c:42ff:fe28:7945 56 64 1ms echo reply
fe80::21a:4dff:fe5d:8e56 56 64 3ms echo reply
sent=1 received=4 packet-loss=-300% min-rtt=1ms avg-rtt=1ms max-rtt=3ms
Ping large packets:
[admin@dzeltenais_burkaans] > /ping 10.1.101.3 size=1600 do-not-fragment
HOST SIZE TTL TIME STATUS
576 64 3ms fragmentation needed and DF set
576 64 6ms fragmentation needed and DF set
sent=2 received=2 packet-loss=0% min-rtt=3ms avg-rtt=4ms max-rtt=6ms
Ping by DNS name
[admin@dzeltenais_burkaans] > /ping www.google.lv
HOST SIZE TTL TIME STATUS
74.125.77.99 56 47 59ms
74.125.77.99 56 47 85ms
sent=2 received=2 packet-loss=0% min-rtt=59ms avg-rtt=72ms max-rtt=85ms
Ping MAC address
[admin@dzeltenais_burkaans] > /ping 00:0C:42:72:A1:B0
HOST SIZE TTL TIME STATUS
00:0C:42:72:A1:B0 56 0ms
00:0C:42:72:A1:B0 56 0ms
sent=2 received=2 packet-loss=0% min-rtt=0ms avg-rtt=0ms max-rtt=0ms
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