Small question about ping


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Lets say one part of my network is like this:

2 Clients connected "directly" thru a switch.

 

If Client 1 Pings client 2, from my understanding the ping goes directly Client1 -> switch -> Client2


I want to diagnose a problem with ping loss... 

 

Or does it go thru the router under the switch?

 

Client 1 | Client 2

Switch

Router

Edited by nuhll
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Okay, fine. Like i thought.

 

I found out that Clients -> Switch -> Router 1 -> Router 2 (and all hard connections between clients) seem to dont drop packets.

 

BUT the 2 routers which comes AFTER router 2, do drop pings. 1% ~~, its not much, but sometimes its like 26 pings (5sec each) so that is very very distruptive. (tested from clients)


NOW is the question is it because of the 2 routers AFTER router 2, or is it Router 2 which drops packets hes sending to WAN (Router 3 & 4)?

 

Do you know any clever way to find that out?

 

Clients

Router 1 (Google Wifi)

Router 2 (does load balancing)

-> Router 3 & 4

Edited by nuhll
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Two main reasons why routers drop packets

1. Bad connection/cabling. Ensure all cables are properly seated and/or replace cables

2. Router overload. Too much traffic for the router to handle

 

Check if your routers provide any statistics about interfaces

Here is an example from my router

eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 18:e8:29:bd:80:c7 brd ff:ff:ff:ff:ff:ff
    inet 10.0.101.1/24 brd 10.0.101.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::1ae8:29ff:febd:80c7/64 scope link
       valid_lft forever preferred_lft forever
    Description: LAN

    RX:  bytes    packets     errors    dropped    overrun      mcast
    1569109171   11965971          0        337          0     368921
    TX:  bytes    packets     errors    dropped    carrier collisions
    27131680121   20486430          0          0          0          0

 

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I found statistics for router 3 and 4.

 

For Router 2 i need to install a syslog server and let it run so this takes some time i guess.

 

Router 3 and 4 have crazy drops to the internet, but thats because its also bundling LTE. So thats normal. But i want to know why IN my LAN packets drops. Anyway could that have anything to do with it?! (i dont think)

3.png

4.png

Edited by nuhll
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