OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
    0%
  • Task Type Bug Report
  • Category Kernel
  • Assigned To No-one
  • Operating System All
  • Severity Critical
  • Priority Very Low
  • Reported Version openwrt-19.07
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Clifford Anup Dhamanigi - 11.01.2021

FS#3571 - Kernel Drops Packets and causes heavy re-transmission

Supply the following if possible:
- Device problem occurs on - Netgear R6220
- Software versions of OpenWrt/LEDE release, packages, etc - OpenWrt 19.07.04 & 19.07.05, mt7621
- Steps to reproduce - No Specific steps to reproduce the problem. Problem automatically starts occurring after a few weeks of usage. Upon running tcpdump on the bridged lan interface where majority of my clients are connected, many packets were dropped by the Kernel which caused many re-transmissions.

root@OpenWrt:~# tcpdump -i br-lan -w /mnt/sda1/tcpdump/tcpdump.pcap
tcpdump: listening on br-lan, link-type EN10MB (Ethernet), capture size 262144 bytes

39397 packets received by filter
14785 packets dropped by kernel
root@OpenWrt:~#

During the tcpdump packet capture, all I tried doing was browse various web pages from one client and do a speedtest from another client. The web pages would either never load and load after several re-attempts. Speedtest would fail to complete and error out.

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