Date: Sat, 30 Apr 2022 18:39:57 -0700 From: Bakul Shah <bakul@iitbombay.org> To: bob prohaska <fbsd@www.zefox.net> Cc: freebsd-net@freebsd.org, freebsd-arm@freebsd.org Subject: Re: 60+% ping packet loss on Pi3 under -current and stable-13 Message-ID: <FE6B7DD6-4F71-430C-A78D-480D18F45CCA@iitbombay.org> In-Reply-To: <20220430021207.GA7600@www.zefox.net> References: <8936EFD1-F1FD-48CF-9ED3-4D42595464DC@yahoo.com> <20220313193406.GA65568@www.zefox.net> <D0DFF445-9B68-4C64-B9CA-D68149ACD89E@yahoo.com> <20220314010330.GA70447@www.zefox.net> <9FA3F874-2987-44A2-A987-F905E78CCA65@yahoo.com> <20220428023226.GA5666@www.zefox.net> <8A57B411-AA06-47F4-935D-EDF45D8DF0EC@yahoo.com> <70C2DF4B-D08B-491D-B7B5-1EAD0D1BF0E3@yahoo.com> <20220429005206.GA1171@www.zefox.net> <A5172CAE-7327-4B13-94F7-989607D01237@yahoo.com> <20220430021207.GA7600@www.zefox.net>
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On Apr 29, 2022, at 7:12 PM, bob prohaska <fbsd@www.zefox.net> wrote: > > Since about December of 2021 I've been noticing problems with > wired network connectivity on a pair of raspberry pi 3 machines > using wired network connections. One runs stable-13.1, the other > runs -current, both are up to date as of a few days ago. > > Essentially both machines fail to respond to inbound network > connections via ssh or ping after reboot. If I get on the > serial console and start an outbound ping to anywhere, both > machines respond to incoming pings with about a 65% packet > loss. Ssh connections are answered with delays of zero to > perhaps thirty seconds. Once connected ssh is usable but > erratic, with dropped characters, multi-second delays and > disconnects after random intervals from minutes to hours. > > There are five other Raspberry Pi's on the network. Three > Pi2's run 12.3-stable, one Pi2 runs -current and a Pi4 runs > -current. All have no problems pinging one another and out > of network, so there's nothing obviously wrong with the net. > The network is not routed, but rather a block of eight > addresses simply bridged from my ISP over DSL. > > It's been found that an image of 13.1-RC4 behaves similarly > on one Pi3 when on the public network but exhibits more normal > ping response when moved to a 192.168.1.n private network. On > the face of it, this seems significant, but I can't guess how. Suggest running tcpdump on the rpi3 to see what is going on when connected to the public vs private net.
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