LTE3301-PLUS - asymmetric ping response times

gabor2

Hi All,

I have a Zyxel LTE3301-PLUS router. I use mobile net (300Mb) and there is a wifi intranet containing some hosts and a printer.

The hosts can reach the internet with good speed via wifi. The problem occurs when I want to reach another host. The ping response time changes from 1ms to 1000ms and there is packet loss. The wifi network as intranet is not stable.

E.g. ping: host1 -> host2

$ ping 192.168.1.109
PING 192.168.1.109 (192.168.1.109) 56(84) bytes of data.
64 bytes from 192.168.1.109: icmp_seq=1 ttl=64 time=1046 ms
64 bytes from 192.168.1.109: icmp_seq=2 ttl=64 time=35.3 ms
64 bytes from 192.168.1.109: icmp_seq=3 ttl=64 time=528 ms
64 bytes from 192.168.1.109: icmp_seq=4 ttl=64 time=25.4 ms

And If I ssh into Zyxel router and ping back to the host the result is very bad:

ping: router -> host

ZySH> ping 192.168.1.2<br>common_ping: hostname 192.168.1.2<br>PING 192.168.1.2 (192.168.1.2): 56 data bytes<br>64 bytes from 192.168.1.2: seq=0 ttl=64 time=1.471 ms<br>64 bytes from 192.168.1.2: seq=1 ttl=64 time=112.857 ms<br>64 bytes from 192.168.1.2: seq=2 ttl=64 time=25.187 ms<br>64 bytes from 192.168.1.2: seq=3 ttl=64 time=45.170 ms

From host to router it is fine:
ping host -> router

$ping 192.168.1.1<br>PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.<br>64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=2.08 ms<br>64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.46 ms<br>64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.74 ms<br>64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.65 ms

Settings :

• RTS/CTS Threshold :  1500
  
• Fragmentation Threshold : 2000
  
• Beacon Interval : 100
• DTIM : 1

I have tried many things without result:

• 4 different computers
• Moving router to other places
• Changing band : 5G and 2.4G
• Changing RTS/CTS Threshold and Fragmentation Threshold
• Changing wifi channel (auto or some value)
• Changing Bandwidth (20, 20/40, 20/40/80)

Does anybody has some idea why it is happening?

Kind regards,

Gabor

gabor2

fixing broken lines:

ping: router -> host

ZySH> ping 192.168.1.2
common_ping: hostname 192.168.1.2
PING 192.168.1.2 (192.168.1.2): 56 data bytes
64 bytes from 192.168.1.2: seq=0 ttl=64 time=1.471 ms
64 bytes from 192.168.1.2: seq=1 ttl=64 time=112.857 ms
64 bytes from 192.168.1.2: seq=2 ttl=64 time=25.187 ms
64 bytes from 192.168.1.2: seq=3 ttl=64 time=45.170 ms

From host to router it is fine:
ping host -> router

$ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=2.08 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.46 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.74 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.65 ms

Miaa

Hi gabor2, I use two laptop connect to LTE3301-PLUS WiFi 5GHz SSID, ping from router to host and get the different result, it seems ping response time depends on the host. 

ping router->laptop 1


ping router->laptop 2