On 2019-04-09 07:46, Peter Wiersig wrote:
mick crane <mick.cr...@gmail.com> writes:
the PCs are physically adjacent connected with the RJ45 ( isn't it )
cables through what is supposed to be a switch I got in B&Q several
years ago.
Almost, RJ-45 is the specification for the plug and jacks, what you're
having here is ethernet wiring in twisted pairs between client and
server connected by a hub. Or switch, please clarify that as that
changes a lot.
Is anything else connected to this hub? If your problems occur, is
anything else using the hub concurrently? Can you reduce the
connections only to server and client and maybe a internet uplink?
Network printers can do unimaginably bad things in regard to hubs, and
even switches.
Can you change the hub to a real switch?
but I think it might be a hub.
Perhaps that is the culprit ?
Perhaps. Check the "ifconfig" output on the Linux side, maybe reset the
server, connect from windows and if you're having problems check the
dmesg output regarding the interface.
i
how do I tell if it's a switch or a hub ?
I thought a switch sends data over the required port but a hub sends
over all the ports ?
It's got "8 port switch" printed on it but if there is network activity
all the lights seem to flash.
/sbin/ifconfig
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.3 netmask 255.255.255.0 broadcast 10.0.0.255
inet6 fe80::219:d1ff:fe41:c769 prefixlen 64 scopeid 0x20<link>
ether 00:19:d1:41:c7:69 txqueuelen 1000 (Ethernet)
RX packets 47732498 bytes 13998322190 (13.0 GiB)
RX errors 0 dropped 5642 overruns 0 frame 0
TX packets 73403188 bytes 102853469866 (95.7 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 21 memory 0xdffe0000-e0000000
I've got a Buster PC with apache2, cups, dovecot, roundcube as mail and
print server.
a Buster PC I mess about on, a win 10 PC and a printer all connected to
the "switch"
the gateway is a PC with pfsense on it which is connected to "switch"
and its other network card connected to ISP router thing.
Maybe the sluggishness I sometimes observed is Windows updating itself ?
mick
For reference, here's my output:
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 217.172.177.159 netmask 255.255.255.0 broadcast
217.172.177.255
ether 00:19:66:f1:43:9e txqueuelen 1000 (Ethernet)
RX packets 81994186 bytes 14753508445 (13.7 GiB)
RX errors 14 dropped 0 overruns 14 frame 0
TX packets 107524155 bytes 14836289080 (13.8 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Take note of the 2nd line of RX and TX status lines, there should be no
counters there, in my case 14 overruns in regard to 819 million packets
is a very low error rate. I suspect that if there's a network problem
it would manifest in some higher relative values on your side.
If in doubt verify that both sides are set to auto-negotiate and
replace
both wires from the machines to the hub with new cables.
Peter
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