Opened 8 years ago

Last modified 4 years ago

#6811 assigned defect

adm5120 - no networking after UDP storm

Reported by: trnap7am@… Owned by: juhosg
Priority: normal Milestone: Barrier Breaker 14.07
Component: kernel Version: Kamikaze trunk
Keywords: adm5120 Cc:


I've been testing trunk r20018 on Edimax BR6104K (adm5120 platform).

After running UDP test using iperf between two computers connected through router:

iperf -c -u -b 50m -d

Router seems to be dead from network and is only accessible over serial line.

How to reproduce:

  1. Setup networking between computers connected to router
ifconfig eth0 netmask up
ifconfig eth0 netmask up
  1. Perform iperf test
iperf -s -u   #on computer with ip address
iperf -c -u -b 50m -d   #on computer

Expected result:
Under heavy load router should start dropping packets when consuming all available memory and should not drop packets after the the test finished.

Actual result:
Under heavy load router consumes all memory and starts dropping packets. When the test finished, router has free memory again but packetloss is kept very high.

Ping from inside:

root@(none):/# ping
PING ( 56 data bytes
64 bytes from seq=4 ttl=128 time=1.952 ms
64 bytes from seq=6 ttl=128 time=1.133 ms
64 bytes from seq=7 ttl=128 time=9.475 ms
64 bytes from seq=17 ttl=128 time=2.469 ms
64 bytes from seq=19 ttl=128 time=1.646 ms
64 bytes from seq=0 ttl=128 time=20015.800 ms
64 bytes from seq=1 ttl=128 time=19015.264 ms
64 bytes from seq=2 ttl=128 time=18014.648 ms
--- ping statistics ---
23 packets transmitted, 8 packets received, 65% packet loss

Ping from outside:

# ping -c 50
PING ( 56(84) bytes of data.
From icmp_seq=10 Destination Host Unreachable
From icmp_seq=10 Destination Host Unreachable
From icmp_seq=11 Destination Host Unreachable
From icmp_seq=12 Destination Host Unreachable
64 bytes from icmp_seq=16 ttl=64 time=0.966 ms
64 bytes from icmp_seq=18 ttl=64 time=0.694 ms
64 bytes from icmp_seq=20 ttl=64 time=0.706 ms
64 bytes from icmp_seq=21 ttl=64 time=0.640 ms
64 bytes from icmp_seq=47 ttl=64 time=0.709 ms

--- ping statistics ---
50 packets transmitted, 5 received, +4 errors, 90% packet loss, time 49001ms

Serial line communication is attached.

Attachments (1)

dmesg.log (89.9 KB) - added by trnap7am@… 8 years ago.
Serial line communication log

Download all attachments as: .zip

Change History (4)

Changed 8 years ago by trnap7am@…

Serial line communication log

comment:1 Changed 8 years ago by thepeople

  • Owner changed from developers to florian
  • Status changed from new to assigned

comment:2 Changed 8 years ago by florian

  • Owner changed from florian to juhosg

comment:3 Changed 4 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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