Re: [gentoo-user] Browsers cannot access WWW while ping and host utilities work as expected.

[Mick <michaelkintzios@gmail.com>]

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On Monday 05 Aug 2013 15:41:09 Bruce Hill wrote:
> On Mon, Aug 05, 2013 at 04:31:44PM +0200, Marc Joliet wrote:
> > Am Mon, 5 Aug 2013 07:59:09 -0500
> > 
> > schrieb Bruce Hill <daddy@happypenguincomputers.com>:
> > > If this is "the new kernel naming scheme of NICs", why this in dmesg:
> > > 
> > > [    4.725902] systemd-udevd[1176]: renamed network interface wlan0 to
> > > enp0s18f2u2
> > > 
> > > It looks as if systemd-udev renamed the NIC to me. Can you explain?
> > 
> > It already has been explained in the previous NIC renaming discussion:
> > what's broken is renaming a device within the kernels internal
> > namespace, which contains eth*, wlan* (and maybe others). The problem is
> > that there is a race condition with the kernel when renaming ethX to
> > ethY. What you *can* do is rename ethX to somethingelseX or
> > somethingelseY, because then you are not racing against the kernel to
> > hand out device names.
> > 
> > This is explained on the website that also explains the new default
> > renaming scheme used by udev. I (and IIRC others, too) already linked to
> > it in in the old
> > 
> > thread, and the relevant news item also referenced it, but here it is 
again:
> >   http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInte
> >   rfaceNames/
> 
> The fact is that udev renamed the NIC. For the average Joe with one NIC
> (very large percentage of users) this is a non sequitur. For those of us
> with 2 or more NICs, myself included, we have already setup our systems to
> use multiple NICs for a purpose and configured the system so that nothing
> can/will/needs to rename subsequent NICs.
> 
> My point is don't say "the new kernel naming scheme of NICs", say "the new
> systemd naming scheme of NICs".

Indeed!  Thanks for bringing this to my attention.  Here's my eth0:

[    6.437527] systemd-udevd[1407]: starting version 204
[    7.457924] systemd-udevd[1428]: renamed network interface eth0 to enp11s0

while my wireless NIC stays named as always was (wlan0):

[    7.822350] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
[    7.838741] b43-phy0: Found PHY: Analog 6, Type 5 (LP), Revision 1
[    7.838760] b43-phy0 debug: Found Radio: Manuf 0x17F, Version 0x2062, 
Revision 2
[   15.771370] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[   15.775217] b43-phy0 debug: b2062: Using crystal tab entry 19200 kHz.
[   17.157109] b43-phy0 debug: Chip initialized
[   17.157427] b43-phy0 debug: 64-bit DMA initialized
[   17.157888] b43-phy0 debug: QoS disabled
[   17.167424] b43-phy0 debug: Wireless interface started
[   17.172410] b43-phy0 debug: Adding Interface type 2
[   17.173097] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready


BTW, I have no systemd installed, only udev-204 and udev-init-scripts-26.
-- 
Regards,
Mick

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