Rebooting the router fixed the problem. It's a Netgear genie 6200v2, with the original firmware, and getting a bit long in the tooth. This is the first time that I remember it behaving oddly.
Thanks for the troubleshooting reminder. -- - David Fleck ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Tuesday, December 11, 2018 7:45 PM, Russell Senior <russ...@personaltelco.net> wrote: > Oh, also check to see that the IPaddr that your problematic laptop has is > distinct from all other hosts on your network. I recall a problem once upon a > time with the Paradyne/Zhone DSL modems that Integra Telecom used would > happily hand out leases of ipaddrs that were already taken on the network, > leading to periodic clashes with devices with static IPs. > > On Tue, Dec 11, 2018 at 5:42 PM Russell Senior <russ...@personaltelco.net> > wrote: > >> More info needed: >> >> * What is the router? What is it running (i.e. stock vs 3rd party >> firmware); >> * Have you tried power cycling the router? >> * Have you looked at dmesg -T on your problematic laptop? >> * Have you looked at iptables on your problematic laptop? >> >> On Tue, Dec 11, 2018 at 5:32 PM David Fleck <dcfl...@protonmail.ch> wrote: >> >>> My wife and I have 2 practically identical ThinkPad laptops, both running >>> OpenSUSE 42.3. They connect to a wireless router via DHCP. We also have >>> several desktop machines (Linux & FreeBSD) with static IP addresses. All >>> the machines are connected by a router. Both laptops can see the router, >>> the outside world, and each other. But one laptop can see all the >>> desktops, and the other one can't see any of them. The desktops can't see >>> the one laptop, either. >>> >>> As far as I can see, the routing tables are the same on both laptops: >>> m2:~ # route ### This is the non-connecting laptop >>> Kernel IP routing table >>> Destination Gateway Genmask Flags Metric Ref Use >>> Iface >>> default 192.168.1.1 0.0.0.0 UG 600 0 0 >>> wlan0 >>> 192.168.1.0 * 255.255.255.0 U 600 0 0 >>> wlan0 >>> >>> dcf:~> route ### This is the connecting laptop >>> Kernel IP routing table >>> Destination Gateway Genmask Flags Metric Ref Use >>> Iface >>> default 192.168.1.1 0.0.0.0 UG 600 0 0 >>> wlan0 >>> 192.168.1.0 * 255.255.255.0 U 600 0 0 >>> wlan0 >>> >>> But when I try to ping from the non-connecting laptop: >>> m2:~ # ping 192.168.1.9 >>> PING 192.168.1.9 (192.168.1.9) 56(84) bytes of data. >>> ^C >>> --- 192.168.1.9 ping statistics --- >>> 5 packets transmitted, 0 received, 100% packet loss, time 3999ms >>> >>> whereas: >>> dcf:~> ping 192.168.1.9 >>> PING 192.168.1.9 (192.168.1.9) 56(84) bytes of data. >>> 64 bytes from 192.168.1.9: icmp_seq=1 ttl=64 time=9.59 ms >>> 64 bytes from 192.168.1.9: icmp_seq=2 ttl=64 time=0.960 ms >>> 64 bytes from 192.168.1.9: icmp_seq=3 ttl=64 time=0.960 ms >>> >>> I'm flummoxed. Everything I can think to look at on the non-connecting >>> laptop looks right, but the machines simply don't 'see' each other, even >>> though they can see other machines on the network and there is no >>> difference in network topology distinguishing connecting and non-connecting >>> machines. Reboots (of desktops and the laptop) haven't helped. >>> >>> Last data point: this was all working correctly 24 hours ago. >>> >>> -- >>> - David Fleck >>> _______________________________________________ >>> PLUG mailing list >>> PLUG@pdxlinux.org >>> http://lists.pdxlinux.org/mailman/listinfo/plug _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
