[OpenWrt-Devel] Ethernet problems with trunk on brcm47xx

[Felix Fietkau]

On 2014-06-24 01:17, Paul Sokolovsky wrote:
> Hello,
> 
> I upgraded my Asus WL-500g Deluxe from 10.03.1 to today's daily build
> of trunk ("BARRIER BREAKER (Bleeding Edge, r41302)") to test fix for
> issue https://dev.openwrt.org/ticket/7552 .
> 
> After upgrade, all WiFi clients work ok. However, all wired ethernet
> clients lost connectivity. All obvious checks like leds blinking for
> lan ports, swconfig dev eth0 show showing connected ports up, dnsmasq
> running on udp 0.0.0.0:67, pass. Ultimately, doing "logread -f" and
> connecting cable to my RasPi I see:
> 
> Mon Jun 23 22:54:14 2014 daemon.info dnsmasq-dhcp[905]: DHCPDISCOVER(br-lan) b8:27:eb:2d:38:4d 
> Mon Jun 23 22:54:14 2014 daemon.info dnsmasq-dhcp[905]: DHCPOFFER(br-lan) 192.168.15.177 b8:27:eb:2d:38:4d 
> Mon Jun 23 22:54:17 2014 daemon.info dnsmasq-dhcp[905]: DHCPDISCOVER(br-lan) b8:27:eb:2d:38:4d 
> Mon Jun 23 22:54:17 2014 daemon.info dnsmasq-dhcp[905]: DHCPOFFER(br-lan) 192.168.15.177 b8:27:eb:2d:38:4d 
> Mon Jun 23 22:54:20 2014 daemon.info dnsmasq-dhcp[905]: DHCPDISCOVER(br-lan) b8:27:eb:2d:38:4d 
> Mon Jun 23 22:54:20 2014 daemon.info dnsmasq-dhcp[905]: DHCPOFFER(br-lan) 192.168.15.177 b8:27:eb:2d:38:4d 
> 
> In other words, dnsmasq on router sees DHCP request from RasPi,
> and replies to it with IP address, but RasPi never sees that reply and
> keeps resending requests, until it gives up and autoassigns 169.*.
> 
> Worse, I cannot access a device with static IP address on the same
> subnet connected via ethernet (from WiFi client or from router itself).
> Also, if I connect via ethernet and set static IP on my laptop, I
> cannot ping router from it. But I can ping and otherwise access another
> ethernet device with static IP, so switch in router works as
> expected ;-).
> 
> Intuitively, this would look like problem with bridging (eth0.0 ->
> br-lan works, but the other direction doesn't), but brctl looks as
> usual:
> 
> root at OpenWrt:~# brctl show
> bridge name	bridge id		STP enabled	interfaces
> br-lan		7fff.0015f23d7889	no		eth0.0
> 							wlan0
> 
> 
> I would appreciate any hints (again, I upgraded, preserving config,
> from 10.03.1, if that may be relevant).
Please try resetting your config, your network config probably doesn't
have the updated switch configuration settings.

- Felix
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