NewDisplayName Posted November 14, 2019 Share Posted November 14, 2019 (edited) 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 November 14, 2019 by nuhll Quote Link to comment
bonienl Posted November 14, 2019 Share Posted November 14, 2019 When both clients are in the same network, e.g. 192.168.1.X then they will talke directly to each other via the switch. The router only gets involved if the clients are each in a different network. Quote Link to comment
NewDisplayName Posted November 14, 2019 Author Share Posted November 14, 2019 (edited) 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 November 14, 2019 by nuhll Quote Link to comment
bonienl Posted November 14, 2019 Share Posted November 14, 2019 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 Quote Link to comment
NewDisplayName Posted November 14, 2019 Author Share Posted November 14, 2019 (edited) 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) Edited November 14, 2019 by nuhll Quote Link to comment
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