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ping -t not working

ping -t not working

ping -t not working

On a Cisco ASA ping works but ping -t does not:

firewall# ping www.cisco.com
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to <IP>, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/8/10 ms

firewall# ping -t www.cisco.com
firewall# ping -t www.cisco.com
ERROR: % Invalid Hostname

What is going on?

RE: ping -t not working

Try the -t at the end instead of after the ping command.

firewall# ping www.cisco.com -t

Hope this helps.

RE: ping -t not working

Is there a space between the -t and the hostname? Hard to tell in the post.

RE: ping -t not working

I tried both ping -t www.cisco.com and ping www.cisco.com -t (yes there is a space)

I was able to use the ping repeat command for a long ping. I can only guess that ping -t is disabled somehow on the firewall?

RE: ping -t not working

Your 'ping', along with whatever else is available at your shell prompt, is most likely provided by busybox.



BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides minimalist replacements for most of the utilities you usually find in GNU coreutils, util-linux, etc. The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the options that are included provide the expected functionality and behave very much like their GNU counterparts.




Send ICMP ECHO_REQUEST packets to network hosts


-4, -6 Force IPv4 or IPv6 hostname resolution
-c CNT Send only CNT pings
-s SIZE Send SIZE data bytes in packets (default:56)
-I IFACE/IP Use interface or IP address as source
-W SEC Seconds to wait for the first response (default:10)
(after all -c CNT packets are sent)
-w SEC Seconds until ping exits (default:infinite)
(can exit earlier with -c CNT)
-q Quiet, only displays output at start
and when finished

If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

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