From: Arvid Brodin <Arvid.Brodin@xdin.com>
To: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Stephen Hemminger <shemminger@vyatta.com>
Subject: "ADDRCONF(NETDEV_UP): eth0: link is not ready" with IPv6
Date: Fri, 29 Jun 2012 02:36:51 +0000 [thread overview]
Message-ID: <4FED14C2.9020200@xdin.com> (raw)
Hi,
After 'ip link set eth0 up' on an avr32 board (network driver macb), the device ends up in
operational mode "UNKNOWN":
# ip link
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
link/ether 00:24:74:00:17:9d brd ff:ff:ff:ff:ff:ff
Unplugging and plugging in the network cable gets the device to mode "UP".
This is a problem for me because I'm trying to use this device as a "slave" device (for a
virtual HSR device*) and I need to be able to decide if the slave device is operational or
not.
Following Stephen's advice here:
http://kerneltrap.org/mailarchive/linux-netdev/2008/9/24/3398834 I checked the macb.c code
and noticed they do not call netif_carrier_off() neither before register_netdev() nor in
dev_open().
I added the call before register_netdev(), which fixed the problem. However, if I then
enable IPv6:
# ip link set eth0 up
ADDRCONF(NETDEV_UP): eth0: link is not ready
eth0: link up (100/Full)
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Any idea what is happening / what I'm doing wrong? (This is not just cosmetic; is some
situations this seems to kill the interface - e.g. ping does not work, down/up does not
help...) Things work fine without IPv6 configured.
*N.B. I'm writing a driver for a network protocol called "High-availability Seamless
Redundancy".
--
Arvid Brodin | Consultant (Linux)
XDIN AB | Jan Stenbecks Torg 17 | SE-164 40 Kista | Sweden | xdin.com
next reply other threads:[~2012-06-29 2:36 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-29 2:36 Arvid Brodin [this message]
2012-06-29 15:24 ` "ADDRCONF(NETDEV_UP): eth0: link is not ready" with IPv6 Ben Hutchings
2012-07-03 15:47 ` Arvid Brodin
2012-07-03 15:55 ` Ben Hutchings
2012-07-03 16:15 ` Nicolas Ferre
2012-07-03 16:15 ` Nicolas Ferre
2012-07-04 0:30 ` Ben Hutchings
2012-07-04 0:30 ` Ben Hutchings
2012-07-04 9:14 ` [PATCH] net/macb: manage carrier state with call to netif_carrier_{on|off}() Nicolas Ferre
2012-07-04 9:14 ` Nicolas Ferre
2012-07-09 7:03 ` David Miller
2012-07-09 7:03 ` David Miller
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