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Thread: Network Cards - 12.2 install

  1. #11
    Join Date
    Feb 2009
    Location
    Finland
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    211

    Default Re: Network Cards - 12.2 install

    lwfinger. Yes! That's what I thought also.

    I tried to fix things up post-install but still no joy. I notice in the logs a load of error messages mentioning network manager!

    I have just re-done the install and, this time, made no changes to the config of the wired connection. That is, I put it "on boot" after disabling netmanager and ipv6. I recall that I had tried "on plug" and then "on boot" after that failed.

    This time, it brought up the card and things are progressing normally. Will post again if anything weird happens.

    Cheers - AK

  2. #12
    Join Date
    Feb 2009
    Location
    Finland
    Posts
    211

    Default Re: Network Cards - 12.2 install

    Right.

    Using another box with a cable nic and a wireless nic and experimenting with various combos of "boot" and "hotplug".

    Basically, if both networks are available both are brought up but the default route goes to the cable rather than the wireless. Since the wireless has the better bandwidth, it "should" be the choice but...

    If I disconnect the cable after both nics have been set up, I lose the default route (dhcpd removes it) effectively killing the network. It would be good if the "underware" would re-assign the default route to the nic that is up still. After 1-15 minutes, still no default route. It only comes back if I plug the cable in again.

    If I use the ifplgd priority and both nets are available, it does seem to bring up the nic that has the highest priority. Certainly what I saw from the logs is that when it comes to doing the wlan, it saw that it had a lower priority than the cable and didn't bring it up.

    With the box which was the subject of the original post, I have added the wlan nic after all the installation. The system attempts to bring it up but it is failing to authenticate. Its ifcfg-wlan0 is identical (a copy) of the one used on the box that is working fine but still it wont authenticate.

    Will try searching the forum, maybe I'm missing something.

  3. #13
    Join Date
    Jun 2008
    Location
    Kansas City Area, Missouri, USA
    Posts
    7,235

    Default Re: Network Cards - 12.2 install

    On 02/16/2013 06:26 AM, antttikutoja wrote:
    >
    > Right.
    >
    > Using another box with a cable nic and a wireless nic and experimenting
    > with various combos of "boot" and "hotplug".
    >
    > Basically, if both networks are available both are brought up but the
    > default route goes to the cable rather than the wireless. Since the
    > wireless has the better bandwidth, it "should" be the choice but...


    Are you sure that the wireless has better bandwidth? The only way that would
    happen is if you have hardware from 1990 with 10 Mbps capability. Yes, wireless
    might have 300 Mbps capability, but that is half-duplex so the throughput is cut
    in half. In addition, the switch in your router gives you a private wired
    connection, while wireless bandwidth is shared among all the users. Using iperf
    to test throughput against a local server - no WAN is involved - I get 94 Mbps
    on my 100 Mbps connection. The best I have ever seen with a wireless connection
    with 300 Mbps capability is 70 Mbps, and the usual rate is 40-50.

    > If I disconnect the cable after both nics have been set up, I lose the
    > default route (dhcpd removes it) effectively killing the network. It
    > would be good if the "underware" would re-assign the default route to
    > the nic that is up still. After 1-15 minutes, still no default route. It
    > only comes back if I plug the cable in again.


    With the wired nic set to be enabled "on boot", the system is doing exactly what
    it should. You want to set the wired connection to be enabled on cable
    connection. One other consideration is that the system might fail to boot if the
    wired NIC is set to activate on boot, and the wire is disconnected. It happened
    to me.

    > If I use the ifplgd priority and both nets are available, it does seem
    > to bring up the nic that has the highest priority. Certainly what I saw
    > from the logs is that when it comes to doing the wlan, it saw that it
    > had a lower priority than the cable and didn't bring it up.


    I think you should set the wired iface to connect on cable connection, and the
    wireless on boot, and only adjust the priorities if you have multiple devices of
    the same kind.

    > With the box which was the subject of the original post, I have added
    > the wlan nic after all the installation. The system attempts to bring it
    > up but it is failing to authenticate. Its ifcfg-wlan0 is identical (a
    > copy) of the one used on the box that is working fine but still it wont
    > authenticate.


    Without logs, we will never be able to fix this. Some wireless devices in kernel
    3.7 need different firmware than is provided by the kernel-firmware package. I
    submitted the updated package to Factory, and I am assured that it will be in
    12.3, but it is not there yet.



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