On 2023-04-20 09:01, Andrei Borzenkov wrote:
On Wed, Apr 19, 2023 at 10:06 PM Carlos E. R. <robin.listas@telefonica.net> wrote:
On 2023-04-19 20:55, Carlos E. R. wrote:
On 2023-04-19 20:48, Per Jessen wrote:
Carlos E. R. wrote:
On Wednesday, 2023-04-19 at 16:19 +0200, Per Jessen wrote:
Given how different the results were, there has to be more than "not running the exact same command". I mean, their connections, maybe some hardware, cabling?
Nope.
I'm sorry, but I give up. I can't keep up with you. I have no idea how you hope to diagnose anything when you change variables and topic all the time.
Just see the output of my commands that prove the problem is inside the router. It refuses to talk with my SW2. It is crystal clear.
Summary:
1 2 router-----sw1------sw2-----telcontar \ \-----isengard \Legolas
ping telcontar → isengard : 0% loss ping isengard → telcontar : 0% loss
ping telcontar → router : 0..30% loss
ping isengard → router : 0..30% loss
"router" is hopelessly ambiguous here. "Router" by definition has multiple addresses and you neither showed your complete addressing plan nor told what router address you access.
The problem goes back for months, since the technician installed it, thus before I had IPv6. The only address it has, for the purpose of this test, is the usual 192.168.1.1. It is the typical consumer router provided by an ISP: it connects to the internet on one side, using fiber, and to the home LAN on the other, using 4 ethernet mouths and wifi. Model is "Mitrastar-HGW-2501GN". I have the manual in Spanish, dated 2014. The router is probably manufactured to specs from Telefónica, so I have not found an English manual to download. It is a piece of crap. I can not access its log. Route on this computer is: default via 192.168.1.1 dev eth0 192.168.0.0/16 dev eth0 proto kernel scope link src 192.168.1.14 So the router and network is configured for a /16 network. The installer did the typical /24, made no difference to this problem. https://www.manualslib.com/manual/2475708/Mitrastar-Hgw-2501gn-R2.html (English manual online, no download) https://accesorouter.com/router-mitrastar-hgw-2501gn-r2/ <https://www.movistar.es/particulares/atencion-cliente/internet/adsl/equipamiento-adsl/routers/mitrastar/> (ISP doc page)
ping isengard → legolas : 0% loss
ping isengard → sw1 : 0% loss
This lacks legolas - router tests.
Lew asked for that yesterday, it is on another post. Zero loses. Same results connecting Legolas to SW1, to router, or to router via WiFi.
1 2 router-----sw1------sw2-----telcontar \ \-----isengard \Legolas
ping isengard → legolas : 0% loss
(uses the switch part of the router)
ping isengard → legolas : 0% loss wifi of router
So far from this summary, pings inside your LAN are OK and pings to an unknown address that you call "router" are not OK. I fail to see how it points at one of the switches as the root cause.
Because (currently) only pings traversing SW2 and going to the router (192.168.1.1) or internet have loses. When the router was installed, pings traversing SW2 or SW1 had trouble.
And it certainly lacks tests from the switches themselves.
Because I can not do them. SW1 management is only via a Windows app (TP Link Easy Smart). SW2 I lost the password, so I have no access. I have on my ToDo list to to a factory reset on it. Looking at SW1 with TP Link Easy Smart inside Windows virtual machine: It has a "cable test facility". Success. Stats say that port 2 received 158080670 packets, and 864 bad (that could be two months, but it does not say). It send 317033596, none bad. That's the cable going to SW2. Status is "1000M Full". Flow control is off. IGMP snooping is on (needed for TV). Report message suppression is neither on nor off. No VLAN nor LAG groups defined. Loop prevention is disabled. Port mirror is disabled. QOS is port based, and is set to highest on port 1 (to router) and port 2 (SW2). I could change it to 802.1P based, whatever that means. Bandwidth control is set to unlimited. Storm control is disabled. I do not see anywhere a facility to send pings, sorry.
I repeat:
I had one router for years, no trouble. Comes the technician, changes the router.
Connectivity from computer room to router and internet is fully lost.
How are we expected to know what a "computer room" is and what devices are there?
Well, it is simply a bedroom in my house that I call that, where I sit with my computers. No bed. There is a switch, SW2, connected to downstairs SW1 (50 metres of cable, gigabit speed). I have my desktop computer, a mini server, a printer, an access point, a scanner, a new laptop, a TV recorder... Does it really matter? Any information you need, just ask. Better if you tell what command to try to obtain that information. I'm not hiding information, I just do not know you want it. -- Cheers / Saludos, Carlos E. R. (from 15.4 x86_64 at Telcontar)