Trying to test some PMTU Discovery and looking to see ICMP messages but ping no longer supports the -D option? If you google anything about PMTU discovery you will find references to this option on Mac OS X. Running MacOS 10.15.5.
Any ideas?
sh-3.2# ping -D 1.1.1.1
ping: invalid option -- 'D'
Try 'ping --help' or 'ping --usage' for more information.
iMac Line (2012 and Later)
Found it. Somewhere another copy of ping got installed in /usr/local/bin. Renamed that to dumbping and viola.
ping 10.1.1.1 -D
PING 10.1.1.1 (10.1.1.1): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Found it. Somewhere another copy of ping got installed in /usr/local/bin. Renamed that to dumbping and viola.
ping 10.1.1.1 -D
PING 10.1.1.1 (10.1.1.1): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
iMac22:~ john$ sh
sh-3.2$ ping -D 10.0.1.1
PING 10.0.1.1 (10.0.1.1): 56 data bytes
64 bytes from 10.0.1.1: icmp_seq=0 ttl=255 time=1.737 ms
64 bytes from 10.0.1.1: icmp_seq=1 ttl=255 time=1.701 ms
64 bytes from 10.0.1.1: icmp_seq=2 ttl=255 time=0.636 ms
64 bytes from 10.0.1.1: icmp_seq=3 ttl=255 time=0.645 ms
^C
--- 10.0.1.1 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.636/1.180/1.737/0.539 ms
sh-3.2$
🤷🏻♂️
What version of MacOS are you using? Does not work on mine.
Douglass-iMac:~ Doug$ sh
sh-3.2$ ping -D 10.0.1.1
ping: invalid option -- 'D'
Try 'ping --help' or 'ping --usage' for more information.
sh-3.2$
Catalina 10.15.5 (supplemental update) with Zsh v5.7.1 shell:
Same version as you. Same everything.
Tried bash? zsh? Anything funky about your shell?
Tried reinstalling macOS?
sh-3.2$ help
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin19)
That is too weird. No way in **** I care enough to reinstall MacOS.
The help command doesn't even work. Tried bash, zsh.
If I wanted this level of flaky I'd have bought a PC.
Oh well.
What happened to the -D option on ping?