openwrt / openwrt/mt76

[mt7613/mt7615] client connected but ping fail

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#518 279 comments 5 reactions 0 assignees View on GitHub

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Dominant language
C
Stars
888
Forks
436
PR merge metrics
No merged PRs in 30d

Description

on chip mt7613
iwinfo wlan1 assoclist show the sta connected
but ping fail, no network
tcpdump -i wlan1 shows that sta client(My PC) sending arp request and AP reply the arp reply
that means My PC cannot get the arp replay packets
say, AP sending out but actually xmit fail?
and on this situation
it is eating memory
The memory is quickly exhausted
oom-kill

but if I do something

ifconfig wlan1 down
ifconfig wlan1 up

the lost memory back again.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the mt7613/mt7615 failure with iwinfo wlan1 assoclist, tcpdump -i wlan1, and a ping from the connected station. Compare ARP transmission with memory usage, then repeat the ifconfig wlan1 down and ifconfig wlan1 up recovery. Done means the station can exchange traffic and memory no longer grows until OOM-kill.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
networking
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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