packet loss after 8-10 targets

[ksalman]

It seems fping starts reporting timeouts if there are more than 8-10 targets, and it progressively gets worse after that. Is this some kind of limitation I am seeing?

# fping -C 20 -q -B1 -r1 -i10 osuosl.org 9.9.9.9 4.2.2.1 1.0.0.1 cixp.web.cern.ch www.indiana.edu 1.1.1.1  8.8.8.8 youtube.com linuxserver.io www.berkeley.edu www.telefonica.de facebook.com twin-cities.umn.edu 8.8.4.4 4.2.2.2 google.com
osuosl.org          : 42.0 43.0 41.9 43.6 43.3 43.9 44.0 44.0 44.0 43.0 43.0 43.1 42.0 44.8 43.1 43.1 43.1 43.2 43.2 41.8
9.9.9.9             : 16.3 16.3 16.5 18.2 17.4 16.4 16.8 16.5 16.5 16.4 16.4 16.3 17.1 17.8 16.4 16.4 16.4 16.5 16.4 16.3
4.2.2.1             : 7.57 7.96 7.91 7.89 8.93 7.85 7.79 7.73 7.75 8.10 7.92 7.88 7.72 8.62 7.76 7.71 7.65 7.74 7.73 7.75
1.0.0.1             : 6.55 6.99 6.85 10.4 9.50 6.71 6.76 6.76 6.83 6.77 6.74 6.79 6.73 7.84 6.84 6.76 6.84 6.86 6.73 6.79
cixp.web.cern.ch    : 189 189 173 158 154 153 153 154 153 153 153 153 153 154 153 153 153 153 154 153
www.indiana.edu     : 88.0 88.1 66.4 68.3 66.8 66.3 66.1 66.2 66.1 66.2 66.9 66.3 66.1 67.3 66.4 66.1 66.3 66.1 66.7 66.1
1.1.1.1             : 6.60 6.96 6.84 6.79 7.46 6.79 6.82 6.90 6.57 6.78 6.79 6.84 6.80 8.12 6.91 6.85 6.82 6.92 6.57 6.68
8.8.8.8             : 6.57 6.80 6.86 6.97 7.26 6.86 6.79 6.86 6.67 6.77 6.91 6.79 6.76 7.37 6.87 6.77 6.89 6.82 6.56 6.59
youtube.com         : 14.2 14.4 14.3 14.5 17.6 14.4 14.1 14.5 14.2 14.3 14.3 14.4 14.3 14.8 14.4 14.3 14.5 14.2 14.2 14.5
linuxserver.io      : 148 148 148 149 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148 148
www.berkeley.edu    : - - 6.73 8.30 9.65 6.67 6.58 6.87 6.42 6.48 6.39 6.64 6.46 8.41 6.68 6.50 6.65 6.45 6.59 6.64
www.telefonica.de   : - - 177 177 180 177 177 177 177 177 177 177 177 177 177 177 177 177 177 177
facebook.com        : - - - 16.0 15.8 15.7 15.2 15.4 15.3 15.4 15.3 15.4 15.3 17.4 15.4 15.2 15.6 15.3 15.2 15.3
twin-cities.umn.edu : - - - 6.95 8.09 6.60 6.38 6.40 6.29 6.35 6.40 6.66 6.50 8.98 6.63 6.48 6.58 6.52 6.34 6.42
8.8.4.4             : - - - - 6.94 6.70 6.47 6.51 6.70 6.36 6.53 6.63 6.62 6.83 6.74 6.68 6.79 6.47 6.48 6.43
4.2.2.2             : - - - - 8.92 7.54 7.56 7.61 7.59 7.62 7.60 7.60 7.54 9.42 7.95 7.50 7.70 7.45 7.56 7.54
google.com          : - - - - - 14.3 14.3 14.2 14.2 14.2 14.3 14.3 14.4 16.9 14.5 14.2 14.2 14.1 14.3 14.1

The latter targets are fine if I just test against those

# fping -C 20 -q -B1 -r1 -i10 www.berkeley.edu www.telefonica.de facebook.com twin-cities.umn.edu 8.8.4.4 4.2.2.2 google.com
www.berkeley.edu    : 8.79 8.49 8.05 7.70 8.39 8.39 6.64 6.66 8.21 8.89 8.13 8.33 8.39 8.25 6.51 8.36 8.06 8.34 8.31 8.97
www.telefonica.de   : 177 177 177 177 177 177 180 177 177 177 177 177 177 177 177 177 177 177 177 177
facebook.com        : 15.8 15.7 15.3 15.4 15.4 17.4 18.4 15.5 15.3 16.1 15.3 15.4 15.5 15.2 15.5 15.2 15.1 15.3 15.6 16.7
twin-cities.umn.edu : 6.83 6.59 6.45 6.43 6.46 10.3 8.06 6.77 6.39 8.06 6.48 6.40 6.82 6.42 6.38 6.43 6.34 6.41 6.44 9.11
8.8.4.4             : 6.98 6.81 6.60 6.47 6.53 7.31 7.01 7.07 6.54 7.48 6.59 6.50 6.83 6.68 6.56 6.60 6.57 6.52 6.81 8.51
4.2.2.2             : 8.19 8.03 7.54 7.49 7.82 7.79 7.95 7.94 7.63 8.41 7.63 7.60 7.76 7.50 7.51 7.75 7.61 7.61 7.70 7.78
google.com          : 14.7 14.6 14.1 14.3 14.2 17.3 14.6 14.6 14.2 16.9 14.3 14.4 14.5 14.4 14.4 14.3 14.3 14.1 14.4 15.4

[auerswal]

This is quite an aggressive network use, I would suggest you consider if this is really necessary. Please consider using less aggressive settings for network tests.

That said, I have tested your command line once, and it did work fine for me:

$ fping -C 20 -q -B1 -r1 -i10 osuosl.org 9.9.9.9 4.2.2.1 1.0.0.1 cixp.web.cern.ch www.indiana.edu 1.1.1.1  8.8.8.8 youtube.com linuxserver.io www.berkeley.edu www.telefonica.de facebook.com twin-cities.umn.edu 8.8.4.4 4.2.2.2 google.com
osuosl.org          : 165 164 165 164 165 164 164 164 164 164 165 164 164 165 164 164 165 164 165 165
9.9.9.9             : 3.49 3.33 3.82 3.42 3.53 2.99 4.64 3.22 3.23 3.03 3.67 3.14 3.15 3.73 3.71 3.13 3.81 3.24 3.49 3.28
4.2.2.1             : 3.25 2.90 3.14 2.99 3.23 3.39 3.09 3.30 2.88 3.50 3.17 2.82 3.01 3.73 2.72 2.83 3.26 3.27 3.10 3.12
1.0.0.1             : 3.26 3.39 3.71 3.55 3.79 3.35 3.03 3.29 3.41 3.48 3.69 3.34 3.57 3.74 3.83 3.35 3.18 3.83 3.04 3.65
cixp.web.cern.ch    : 20.0 19.4 19.9 19.5 19.7 19.5 19.2 19.6 19.1 19.6 19.6 19.2 19.7 19.8 19.7 19.5 19.8 19.7 19.4 19.3
www.indiana.edu     : 110 109 109 109 110 111 109 109 109 109 109 109 109 110 109 109 110 109 109 109
1.1.1.1             : 3.75 3.86 3.69 3.42 3.70 3.32 3.59 3.74 3.81 3.37 3.36 3.27 3.50 3.72 3.70 3.72 3.64 3.75 3.47 3.06
8.8.8.8             : 3.26 3.55 3.11 3.08 3.32 3.21 2.88 3.44 3.29 2.67 3.08 2.80 2.94 3.53 2.82 3.19 2.97 3.43 3.08 3.05
youtube.com         : 3.58 2.89 3.47 3.37 3.14 3.50 3.22 3.23 3.14 3.02 2.84 3.65 3.27 3.25 3.09 3.42 3.29 3.24 3.41 3.32
linuxserver.io      : 28.9 28.7 29.3 28.7 28.9 28.8 28.5 28.6 28.9 28.8 28.7 28.9 29.1 29.1 28.9 28.7 29.1 29.0 28.6 28.7
www.berkeley.edu    : 3.69 3.79 3.64 3.76 3.69 3.12 3.49 3.72 3.69 3.83 3.79 3.64 3.42 3.58 3.55 3.57 3.53 3.59 3.28 3.56
www.telefonica.de   : 8.68 8.51 8.53 7.91 8.24 7.98 8.18 7.80 8.15 8.06 8.45 8.19 8.29 8.30 8.08 7.98 8.33 7.69 8.38 8.44
facebook.com        : 8.47 8.80 8.89 9.24 8.52 8.79 8.56 8.60 8.97 8.95 8.74 8.55 8.61 8.61 8.91 8.80 8.65 8.58 8.74 8.74
twin-cities.umn.edu : 3.66 3.83 3.68 3.75 3.66 3.55 3.41 3.10 3.58 3.82 3.73 3.62 3.31 3.53 3.42 3.51 3.47 3.58 4.43 3.54
8.8.4.4             : 3.32 3.17 3.23 3.56 3.44 3.10 2.92 3.06 3.29 3.27 3.64 2.87 2.96 2.95 2.69 3.12 2.94 2.92 3.62 3.15
4.2.2.2             : 3.07 3.19 3.03 3.13 3.14 2.89 2.87 3.17 3.01 3.22 3.20 3.12 3.28 2.92 3.35 2.93 2.87 2.93 3.26 2.93
google.com          : 3.40 3.75 3.35 3.60 3.05 3.09 2.92 3.66 3.39 3.33 3.67 3.48 3.05 3.24 3.19 3.15 3.17 3.45 3.12 3.31

Your network or ISP might impose a rate limit on ICMP. I would suggest that you use less aggressive settings.

I do not think that this is an fping bug.

[ksalman]

Ok, thanks. I didn't think it was a fping bug. A limit imposed by ISP makes sense.