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2-104 Command Line Interface Commands Reference

ping [ ip ] { ip-addr | hostname } [count count] [timeout milliseconds] [delay milliseconds] [size bytes]

[source ip-addr]

The ping command allows you to send ICMP echo requests to another network device. You can specify the

destination using either an IP address in dotted-quad notation or a hostname. The default count is 5, the

default timeout and delay are 1000 milliseconds (1 second) each, and the default size is 100 bytes. The size

value you specify includes the size of the IP and ICMP packet headers. The minimum size value is 28 and the

maximum size value is 1664. source speciﬁes which router interface IP address ip-addr to use as the source IP

address. If the ping goes out through an interface that has NAT (Network Address Translation) enabled, then

the source address will be translated.

For each timely ICMP echo response received, an exclamation point (“!”) is displayed; for each timeout, a

period (“.”) is displayed; and for each ICMP destination unreachable received, an uppercase letter U (“U”) is

displayed. When the ping operation completes, statistics are displayed including the total number of ICMP echo

requests sent and ICMP echo responses received, the success rate as a percentage, and the minimum,

average, and maximum round trip times.

To abort a ping operation while it is in progress, type Control-C.

Example:

#ping www.netopia.com

Translating "www.netopia.com"... (163.176.4.31) [OK]

Type Control-C to abort.

Sending 5, 100-byte ICMP Echos to 163.176.4.32, timeout is 1 second:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 0/4/10 ms

ping oam interface sdsl id pvc {id | tag | vpi/vci } [count count] [timeout seconds]

This command initiates a process by which up to n (count) OAM loopback tests are performed at n (seconds)

delay between each.

For each individual OAM loopback test failure, a period ‘.’ will be output. For each individual OAM loopback test

success, an exclamation mark ‘!’ will be output. A running total of successes and failures will be maintained for

the duration of the test. The success-to-failure rate is output at the conclusion. If any OAM loopback test fails

for a reason other than a timeout, the command will be aborted immediately.

Example:

ping oam interface sdsl 1 pvc count 17

Type Control-C to abort.

Performing 17 OAM loopback tests; timeout is 5 seconds.

.....

Success rate is 0 percent (0/17)

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