OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity High
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Outré - 10.02.2021

FS#3616 - LAN peers unreachable after a few hours

Device: D-Link DIR-882 A1
Version: OpenWrt SNAPSHOT r15710-f5f01bcacd / LuCI Master git-21.029.67968-af1f961

After the router has been booted up for about a day, all LAN peers will become unreachable, but WAN works fine, resulting all LAN applications fail.

I ran a few tests. The Router was 192.168.1.1, a computer assigned 192.168.1.233 and another device 192.168.1.169.

Connection to the router was fine:

> tracert 192.168.1.1
Tracing route to OPENWRT.lan [192.168.1.1]
over a maximum of 30 hops:
  1     2 ms     2 ms     2 ms  OPENWRT.lan [192.168.1.1]
Trace complete.

Connection to itself was fine:

> tracert 192.168.1.233
Tracing route to WINDOWS.lan [192.168.1.233]
over a maximum of 30 hops:
  1    <1 ms    <1 ms    <1 ms  WINDOWS.lan [192.168.1.233]
Trace complete.

Connection to peer failed. It returned the address of itself:

> tracert 192.168.1.169
Tracing route to ANDROID.lan [192.168.1.169]
over a maximum of 30 hops:
  1  WINDOWS.lan [192.168.1.233]  reports: Destination host unreachable.
Trace complete.
> ping 192.168.1.169
Pinging 192.168.1.169 with 32 bytes of data:
Reply from 192.168.1.233: Destination host unreachable.
Reply from 192.168.1.233: Destination host unreachable.
Reply from 192.168.1.233: Destination host unreachable.
Reply from 192.168.1.233: Destination host unreachable.
Ping statistics for 192.168.1.169:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

System reboot can solve the problem temporarily. All LAN applications back online:

> ping 192.168.1.169
Pinging 192.168.1.169 with 32 bytes of data:
Reply from 192.168.1.169: bytes=32 time=4ms TTL=64
Reply from 192.168.1.169: bytes=32 time=5ms TTL=64
Reply from 192.168.1.169: bytes=32 time=4ms TTL=64
Reply from 192.168.1.169: bytes=32 time=4ms TTL=64
Ping statistics for 192.168.1.169:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 5ms, Average = 4ms
Outré commented on 10.02.2021 09:48

I will disable hardware flow offloading to see if it's related

Outré commented on 13.02.2021 12:29

Still exists when hardware flow offloading or software flow offloading is disabled.

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