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fakebear
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Joined: 17 Oct 2012
Posts: 5

PostPosted: Wed Oct 17, 2012 2:33 am    Post subject: After install the network not work Reply with quote

I install the version 3.3.8 Gentoo. And follow exactly with the handbook.
While installing, with no DHCP, so I use:
Code:
ifconfig eth0 192.168.31.112 broadcast 192.168.31.255 netmask 255.255.255.0
route add default gw 192.168.31.1
ifconfig eth0 down
ifconfig eth0 up
to set my network. And it works fine.

And I set the /etc/resolv.conf with correct DNS.

I modified the file /etc/conf.d/hostname to change computer name.
Modified the file /etc/conf.d/net with add the following lines:
Code:
config_eth0=( "192.168.31.112 netmask 255.255.255.0 brd 192.168.31.255" )
routes_eth0=( "default via 192.168.31.1" )

And run the cmd line:
Code:
cd /etc/init.d
ln -s net.lo net.eth0
rc-update add net.eth0 default


After the reboot, the network can ping itself with ip 192.168.31.112, but it cannot ping the gateway and any other address anymore.

when i run route, it displayed:
Code:

loopback         localhost    255.0.0.0            UG    0    0    0    lo
192.168.31.0  *                255.255.255.0    U      0    0    0    eth0


I use cmd "route add default gw 192.168.31.1", but it still not work.
And I tried to modify the file "/etc/conf.d/net", change the route part to "routes_eth0=( "default gw 192.168.31.1" )", it still not work.

Please, Please give me some advice. I am not a so good linuxer.
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BillWho
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Joined: 03 Mar 2012
Posts: 1600
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PostPosted: Wed Oct 17, 2012 3:02 am    Post subject: Reply with quote

fakebear,

Check the content of /etc/resolv.conf. If there are no servers listed then add them in /etc/conf.d/net with dns_servers_eth0="8.8.8.8 8.8.4.4"

The above are google's dns servers - you can use them or just replace them with your providers.
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Since installing gentoo, my life has become one long emerge :)
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fakebear
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Joined: 17 Oct 2012
Posts: 5

PostPosted: Wed Oct 17, 2012 3:18 am    Post subject: Reply with quote

Thank you for your answer anyway.
But it is not the problem. Now I cannot ping the gateway with the ip address 192.168.31.1, not associate with the DNS at all.
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DONAHUE
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Joined: 09 Dec 2006
Posts: 6615
Location: Goose Creek SC

PostPosted: Wed Oct 17, 2012 3:20 am    Post subject: Reply with quote

Quote:
config_eth0="192.168.31.112 netmask 255.255.255.0 brd 192.168.31.255"
routes_eth0="default via 192.168.31.1"
dns_servers="8.8.8.8 8.8.4.4"
parens do not work with openrc and baselayout2
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fakebear
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PostPosted: Wed Oct 17, 2012 4:24 am    Post subject: Reply with quote

Thank you DONAHUE!

After I remove the parens in file "/etc/conf.d/net" and reboot, problem solved.

But after I reboot again, it cannot ping the gateway again. What's the problem?
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DONAHUE
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PostPosted: Wed Oct 17, 2012 4:49 am    Post subject: Reply with quote

what does
Code:
ifconfig
produce?
Code:
/etc/init.d/net.eth0 restart
ping -c2 192.168.31.1
ping -c2 8.8.8.8
ping -c2 google.com
dmesg | grep -i eth
What happens?
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fakebear
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PostPosted: Wed Oct 17, 2012 5:56 am    Post subject: Reply with quote

ifconfig:
Code:

eth0  Link encap:Ethernet HWaddr 90:fb:xx:xx:xx:xx
         inet addr:192.168.31.112 Bcast:192.168.31.255 Mask 255.255.255.0
         UP BROADCAST MULTICAST MTU:1500 Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
         Interrupt:17


/etc/init.d/net.eth0 restart
Code:

Unmounting network filesystems ....  [OK]
Bringing down interface eth0
    Removing addresses
        192.168.31.112/24
Bringing up interface eth0
    192.168.31.112 ...                          [OK]
    Adding routes
        default via 192.168.31.1 ...        [OK]
Mounting network filesystems ...       [OK]


ping -c2 192.168.31.1
Code:

PING 192.168.31.1 (192.168.31.1) 56(84) bytes of data.
From 192.168.31.112: icmp_seq=1 Destination Host Unreachable
From 192.168.31.112: icmp_seq=2 Destination Host Unreachable

--- 192.168.31.1 ping statistics ---
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 999ms pipe 2


And the same result with the other pings.

dmesg | grep -i eth
Code:

[    0.449475] sky2 0000:02:00.0: eth0: addr 90:fb:xx:xx:xx:xx
[    4.605861] sky2 0000:02:00.0: eth0: enabling interface
[    4.606033] ADDRCONF(NETDEV_UP): eth0: link is not ready
[202.184881] sky2 0000:02:00.0: eth0: disabling interface
[202.233962] sky2 0000:02:00.0: eth0: enabling interface
[202.234133] ADDRCONF(NETDEV_UP): eth0: link is not ready
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fakebear
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PostPosted: Wed Oct 17, 2012 6:10 am    Post subject: Reply with quote

Is there any difference between:
Code:

routes_eth0="default via 192.168.31.1"

and
Code:

routes_eth0="default gw 192.168.31.1"
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DONAHUE
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Joined: 09 Dec 2006
Posts: 6615
Location: Goose Creek SC

PostPosted: Wed Oct 17, 2012 6:25 am    Post subject: Reply with quote

IIRC, I have used both with success. Currently I'm using
Quote:
routes_eth0="default gw 192.168.1.1"

You may have a loose connection or intermittent problem.
What does
Code:
lspci -k
say about the nic? manufacturer, model, driver in use?
Code:
rm /etc/udev/rules.d/70-persistent-net.rules
reboot
the rule will regenerate on the reboot.
check that /etc/conf.d/net is as you left it.
could there be another 192.168.31.112 on your subnet?
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fhaddad78
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Joined: 21 May 2012
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PostPosted: Wed Oct 17, 2012 3:53 pm    Post subject: Reply with quote

Having properly configured /etc/resolve.conf, /etc/hosts, and /etc/conf.d/net files is a necessary step towards having a working network.
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