Re: [gentoo-user] Internet

[William Kenworthy <billk@iinet.net.au>]

On Thu, 2011-06-16 at 16:10 +0200, Cahn Roger wrote:
> > Apologies if I missed someone already asking these:
> 
> No problem! Thanks to try to help me.
> 
> > 1. are the lights on or flashing with a cable plugged in and pinging
> > something valid?
> 
> No. They are stable
> 

That indicates a problem - if a packet is going out/in, the lights
shouls flash

> > 2. can you ping yourself (both 127.0.0.1 and the nic IP) - cable plugged
> > in
> 
> They work both (127.0.0.1 and 192.168.1.20 my desktop IP)
> 
that would indicate the software (protocol stack) is ok

> > 3. do you have IP tables installed - "iptables -vnL" and check you have
> > not firewalled yourself off from the world somehow.
> 
> Not iptables installed.
ok

> 
> > 4. set up a ping and check "dmesg" and terminal 12 (<ctrl-alt-F12>) for
> > anything meaningful.
> 
> ping to my laptop which works (192.168.0.22) fails.
> In dmesg (very very long!) I didn't find anything
> I could understand but this:
> [   11.002756] sky2 0000:02:00.0: eth0: enabling interface
> [   11.003194] ADDRCONF(NETDEV_UP): eth0: link is not ready
> [   11.113427] Adding 2048280k swap on /dev/sdb2.  Priority:-1 extents:1
> across:2048280k
> [   14.025657] sky2 0000:02:00.0: eth0: Link is up at 100 Mbps, full
> duplex, flow control rx
> [   14.026096] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [   24.386040] eth0: no IPv6 routers present
> 

normal, seeing the cable and a valid line discipline the other end

> With ctrl+alt+F12 i canread this (interesting?)
> Bureau ntpd_intres[3301] host name not found: 0.gentoo.pool.ntp.org
> (3 other lines like this with number 2, 3, 4)
> 
ntpd is the network time protocol daemon - its basicly complaining about
no network.

> > 5. as an outside chance, run "modinfo [eth_module]" - get the right
> > module name from "lsmod"
> 
> in lsmod I don't have a module eth_module
> 
> 
in this comntext [ ] normally means optional or "replace this" so you
need to do an lsmod, identify the module for your ethernet card (sky2?)
and rum "modinfo eth_module" replacing eth_module with the real module
name.

> 
> 
> 

Next I would remove the switch and use a crossover cable to another
machine and use ethtool on each end to go deeper into what the
hardware/cable is doing.  You can still get problems with one end being
say 10Mb/s and the other running a different speed/duplex etc.  I am
finding that 1Ghz chips seem less than reliable in this regard to older
switches that way!  I also have some 4 port sun 100mhz cards that need
the other end always up before powering the machine they are in on as
nothing I can do once up will get the ends in sync.


also try "cat /proc/net/dev" and see if that shows anything useful

BillK


-- 
William Kenworthy <billk@iinet.net.au>
Home in Perth!