Re: packet loss

On 2023-04-19 13:52, Andrei Borzenkov wrote:

On Wed, Apr 19, 2023 at 2:47 PM Per Jessen wrote:

...

Carlos E. R. wrote:

...

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Isengard:~ # while sleep 1 ; do DATE=`date --iso=s` ; echo -n "$DATE " ; fping -c 20 --period=100 --quiet 2a02:...80d4 ; done

...

2023-04-19T10:11:07+02:00 2a02:...:80d4 : xmt/rcv/%loss = 20/16/20%, min/avg/max = 0.45/0.53/0.69 2023-04-19T10:11:10+02:00 2a02:...:80d4 : xmt/rcv/%loss = 20/0/100% 2023-04-19T10:11:13+02:00 2a02:...:80d4 : xmt/rcv/%loss = 20/11/45%, min/avg/max = 0.47/1.09/5.45

What do you make of 100%& loss?

Even at 10 pings/second, that is surely not right. Some questions are -

a) do the echo requests reach your router? b) does your router respond with echo replies? c) does isengard receive the echo reply?

Briefly looking at documentation for this switch, it should support port mirroring so one could capture what happens on the router side.

I did that on sw1, maybe a month ago, which is the one directly connected to the router. About sw2, I lost the login/password, so I have to factory reset it in order to do anything on it. -- Cheers / Saludos, Carlos E. R. (from 15.4 x86_64 at Telcontar)