#19085: nanostation m5 loco xw "loses" interface
------------------------+------------------------
Reporter: anonymous | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: kernel | Version: Trunk
Resolution: | Keywords:
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Comment (by devel@…):
We (a Freifunk community) encountered the same problem: most of the
Nanostation ''M5 loco XW'' lose their ethernet connectivity every few
hours. It does not happen for (old) XM devices or for ''M5 High-Power XW''
devices.
There seem to be two distinct error patterns causing this ethernet
failure:
=== 1) kernel log: {{{eth0 entered disabled state}}} ===
Without any changes regarding the devices connected via ethernet there is
a sudden drop of the line as indicated by the dmesg output above. This is
confirmed by the output of the following command:
{{{
ip link show dev eth0 | grep NO-CARRIER
}}}
This error seems to happen much more often (every few hours instead of
days) if eth0 is part of a bridge (brctl) - even if eth0 is the only
member of this bridge.
Thus this error may be connected with the promiscuous mode (enabled for
bridge members).
=== 2) half-duplex -> down ===
kernel messages:
{{{
[33432.010000] eth0: link up (10Mbps/Half duplex)
[33434.010000] eth0: link down
}}}
The frequency of this bug seems to be noticeable lower if commit [43776]
is applied. Nevertheless this does not elimenate the bug completely.
The above observations were made with the Barrier Breaker release
including commit [42549] (for supporting the ''loco'' devices in Barrier
Breaker).
For now we did not manage to prepare the specific circumstances that would
trigger the above issues immeadiately. Thus we need to wait for some hours
or days in order to reproduce the bug.
--
Ticket URL: <https://dev.openwrt.org/ticket/19085#comment:1>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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