How are the IP assign, DHCP or static?
If DHCP, are you sure you only have one DHCP server on the network
If on DHCP, try changing the ip renew time to something short like 2
hours and then test?
Go to each PC and write down their network configuration, IP, Subnet,
DNS, Gateway and then compare and make sure that are all the same (other
than IP address)
Reboot the Netgear switch and router
Are you using a firewall\IPtables on any of the devices, can you turn
off to test?
You don't say if there are all ethernet or mixed wifi ethernet
You could try installing wireshark on the device that are not talking to
each other and see what wire shark says when you try to connect
Check workgroup\Domain names make sure they all have the same
When faced with a network issue these are the basics I look at, if all
this comes back OK then we start looking for the bigger problems.
Tim H
On 23/01/2022 15:21, Graeme Gemmill wrote:
I would be grateful for suggestions to solve the following connection
problem.
In the following description, D stands for 192.168.1
My router, D.1, has a control panel that identifies the following
ethernet connected devices:
192.168.1.10 f0:2f:74:1f:d0:99 y
192.168.1.16 b8:27:eb:50:44:91 y
192.168.1.3 f4:30:b9:83:84:1c y
192.168.1.6 74:03:bd:0c:b0:38 y
192.168.1.9 40:16:7e:b4:09:e2 y
y indicates that the device passes traffic to the WAN
My laptop, D.3 shown the following devices by ip neigh:
192.168.1.1 enp1s0 c4:ea:1d:e4:27:a2 REACHABLE Y
192.168.1.10 enp1s0 f0:2f:74:1f:d0:99 STALE N
192.168.1.6 enp1s0 74:03:bd:0c:b0:38 STALE N
192.168.1.9 enp1s0 40:16:7e:b4:09:e2 STALE N
Y/N indicates ping success.
D.3 "knows about" D.6, D.9 and D.10 because they are in /etc/fstab as
a result of previously successful connections.
D.9 acts as a server and shows the following by ip neigh:
192.168.1.1 enp2s0 c4:ea:1d:e4:27:a2 REACHABLE Y
192.168.1.10 enp2s0 f0:2f:74:1f:d0:99 REACHABLE Y
192.168.1.16 enp2s0 b8:27:eb:50:44:91 STALE Y
192.168.1.6 enp2s0 74:03:bd:0c:b0:38 STALE Y
D.10 is my main work PC, and shows the following via ip neigh:
192.168.1.1 enp5s0 c4:ea:1d:e4:27:a2 REACHABLE Y
192.168.1.16 enp5s0 b8:27:eb:50:44:91 REACHABLE Y
192.168.1.6 enp5s0 74:03:bd:0c:b0:38 STALE Y
192.168.1.9 enp5s0 40:16:7e:b4:09:e2 REACHABLE Y
D.6 ia a NAS box that both D.9 and D.10 can and do write to.
D.6, D.9, D.10 and D.16 are connected to D.1 via an 8-way Netgear hub
My problem: D.3 cannot reach D.9 or D.10, and neither D.9 nor D.10 can
reach D.3, despite all being connected to D.1
(I hope the attempt at tabulating this data survives the translation
to other mail clients)
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