#16794: Packets to wlan clients dropped on TP-Link WDR4900
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Reporter: florian.richter@… | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Attitude Adjustment 12.09
Component: packages | Version: Trunk
Keywords: |
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After a couple of days, our TP-Link WDR4900 exhibit the problem, that
clients after successful association and authentication can't acquire a
dhcp lease anymore. Debugging with tcpdump showed, that packets are
bridged from wlan0 to br-lan (our bridge to the appropriate vlan on the
switch), but all packets from br-lan to wlan0 are dropped:
On the access point:
# tcpdump -i br-lan ether host 10:0b:a9:39:e1:70
10:17:40.306401 EAP packet (0) v1, len 10
10:17:40.312908 EAP packet (0) v1, len 161
10:17:40.361224 EAP packet (0) v1, len 6
10:17:40.367743 EAP packet (0) v1, len 6
10:17:40.382405 EAP packet (0) v1, len 144
10:17:40.390775 EAP packet (0) v1, len 6
10:17:40.395089 EAP packet (0) v1, len 80
10:17:40.405900 EAP packet (0) v1, len 144
10:17:40.413032 EAP packet (0) v1, len 80
10:17:40.421173 EAP packet (0) v1, len 80
10:17:40.430027 EAPOL key (3) v1, len 117
10:17:40.435310 EAPOL key (3) v1, len 95
10:17:40.539877 IP6 :: > ff02::16: HBH ICMP6, multicast listener report
v2, 1 group record(s), length 28
10:17:40.583929 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
Request from 10:0b:a9:39:e1:70 (oui Unknown), length 300
10:17:40.595162 IP dhcp1.hadiko.uni-karlsruhe.de.bootps >
hadiko-75-178.hadiko.uni-karlsruhe.de.bootpc: BOOTP/DHCP, Reply, length
303
10:17:41.207499 IP6 :: > ff02::16: HBH ICMP6, multicast listener report
v2, 1 group record(s), length 28
10:17:41.309532 IP6 :: > ff02::1:ff39:e170: ICMP6, neighbor solicitation,
who has fe80::120b:a9ff:fe39:e170, length 24
10:17:42.311697 IP6 fe80::120b:a9ff:fe39:e170 > ff02::16: HBH ICMP6,
multicast listener report v2, 1 group record(s), length 28
10:17:42.314755 IP6 fe80::120b:a9ff:fe39:e170 > ff02::2: ICMP6, router
solicitation, length 8
10:17:42.442978 10:0b:a9:39:e1:70 (oui Unknown) > 50:3d:e5:31:13:b3 (oui
Unknown), ethertype Unknown (0x88c7), length 18:
0x0000: 0101 0000 ....
10:17:42.733414 IP6 fe80::120b:a9ff:fe39:e170 > ff02::16: HBH ICMP6,
multicast listener report v2, 1 group record(s), length 28
10:17:43.982466 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
Request from 10:0b:a9:39:e1:70 (oui Unknown), length 300
10:17:43.990321 IP dhcp1.hadiko.uni-karlsruhe.de.bootps >
hadiko-75-178.hadiko.uni-karlsruhe.de.bootpc: BOOTP/DHCP, Reply, length
303
# tcpdump -i wlan0 ether host 10:0b:a9:39:e1:70
10:17:40.539827 IP6 :: > ff02::16: HBH ICMP6, multicast listener report
v2, 1 group record(s), length 28
10:17:40.583891 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
Request from 10:0b:a9:39:e1:70 (oui Unknown), length 300
10:17:41.207464 IP6 :: > ff02::16: HBH ICMP6, multicast listener report
v2, 1 group record(s), length 28
10:17:41.309488 IP6 :: > ff02::1:ff39:e170: ICMP6, neighbor solicitation,
who has fe80::120b:a9ff:fe39:e170, length 24
10:17:42.311661 IP6 fe80::120b:a9ff:fe39:e170 > ff02::16: HBH ICMP6,
multicast listener report v2, 1 group record(s), length 28
10:17:42.314727 IP6 fe80::120b:a9ff:fe39:e170 > ff02::2: ICMP6, router
solicitation, length 8
syslog on association of one client (no other syslog messages):
Jun 14 10:16:42 notice wap-b2f hostapd: wlan1: STA 10:0b:a9:39:e1:70 IEEE
802.11: authenticated
Jun 14 10:16:42 notice wap-b2f hostapd: wlan1: STA 10:0b:a9:39:e1:70 IEEE
802.11: associated (aid 3)
Jun 14 10:16:43 notice wap-b2f hostapd: wlan1: STA 10:0b:a9:39:e1:70
RADIUS: starting accounting session 5398C728-00000374
Jun 14 10:16:43 notice wap-b2f hostapd: wlan1: STA 10:0b:a9:39:e1:70 IEEE
802.1X: authenticated - EAP type: 25 (PEAP)
Jun 14 10:16:43 notice wap-b2f hostapd: wlan1: STA 10:0b:a9:39:e1:70 WPA:
pairwise key handshake completed (RSN)
Doing wifi up fixes the problem temporarily.
We're running openwrt f8259e2d4df01af.
If necessary, we're happy to provide more information, logging, traces or
remote access to the access point.
--
Ticket URL: <https://dev.openwrt.org/ticket/16794>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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