Packet loss on local lan

[Speedster]

I'm running a TP-Link flashed with Open-Wrt as my primary router (DNS etc) connected to two LTE routers for internet access. The TP-link switches the default gateway between the two routers based on time of day (for rain uncapped LTE). The TP-link is 192.168.0.1, while the LTE routers are 0.2 and 0.3 respectively. In any case, I'm picking up packet loss between the TP-link and one of the routers - what could be the cause of this?

PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=3.078 ms
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=2.815 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=3.952 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=3.605 ms
64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=3.220 ms
64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=3.472 ms
64 bytes from 192.168.0.1: icmp_seq=6 ttl=64 time=4.826 ms
64 bytes from 192.168.0.1: icmp_seq=7 ttl=64 time=2.860 ms
64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=2.779 ms
64 bytes from 192.168.0.1: icmp_seq=9 ttl=64 time=2.979 ms
64 bytes from 192.168.0.1: icmp_seq=10 ttl=64 time=2.824 ms

--- 192.168.0.1 ping statistics ---
11 packets transmitted, 11 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 2.779/3.310/4.826/0.600 ms

PING 192.168.0.2 (192.168.0.2): 56 data bytes
64 bytes from 192.168.0.2: icmp_seq=0 ttl=64 time=3.080 ms
64 bytes from 192.168.0.2: icmp_seq=1 ttl=64 time=5.513 ms
64 bytes from 192.168.0.2: icmp_seq=2 ttl=64 time=3.802 ms
64 bytes from 192.168.0.2: icmp_seq=3 ttl=64 time=2.909 ms
64 bytes from 192.168.0.2: icmp_seq=4 ttl=64 time=3.007 ms
Request timeout for icmp_seq 5
64 bytes from 192.168.0.2: icmp_seq=6 ttl=64 time=3.118 ms
Request timeout for icmp_seq 7
64 bytes from 192.168.0.2: icmp_seq=8 ttl=64 time=1.809 ms
Request timeout for icmp_seq 9
64 bytes from 192.168.0.2: icmp_seq=10 ttl=64 time=3.032 ms
64 bytes from 192.168.0.2: icmp_seq=11 ttl=64 time=6.734 ms
64 bytes from 192.168.0.2: icmp_seq=12 ttl=64 time=13.256 ms

--- 192.168.0.2 ping statistics ---
13 packets transmitted, 10 packets received, 23.1% packet loss
round-trip min/avg/max/stddev = 1.809/4.626/13.256/3.180 ms

 

[SauRoNZA]

Common denominator says if it’s only one of the routers then the problem is there.

Could be physical (wire, interference etc) or the router itself.

Two LTE routers the same? Same firmware etc?

 

[Speedster]

Common denominator says if it’s only one of the routers then the problem is there.

Could be physical (wire, interference etc) or the router itself.

Two LTE routers the same? Same firmware etc?

I changed out the previous router last week because I thought that was the issue, so I doubt it's that. Currently the Rain router (0.2) is a B618 while the peak hour MTN router (0.3) is B315. The packet loss is only to the B618. But you raise a valid point, let me change out the cable and see what happens.

 

[SauRoNZA]

I changed out the previous router last week because I thought that was the issue, so I doubt it's that. Currently the Rain router (0.2) is a B618 while the peak hour MTN router (0.3) is B315. The packet loss is only to the B618. But you raise a valid point, let me change out the cable and see what happens.

Also worth changing the port on the OpenWRT side it’s connected to.

 

[Speedster]

Changed cables, tested a variety of ports but same issue... Going to spend the afternoon with the family and will try to troubleshoot a bit more this evening

 

[Speedster]

I think I've isolated the issue to the B618 router I was using. Any ideas what would cause the B618 to drop packets when connected over LAN? Is it possible that somehow the hardware itself is faulty or would it be some sort of software thing?

 

[Thor]

Huawei routers aren't that great so definitely possible it's hardware related.

 

[RonSwanson]

I think I've isolated the issue to the B618 router I was using. Any ideas what would cause the B618 to drop packets when connected over LAN? Is it possible that somehow the hardware itself is faulty or would it be some sort of software thing?

Ensure that autonegotiate is turned off, both ethernet ports set to the same max speed and full duplex.