Thin clients not booting - help?
Peter k
peter at beetlebolt.com
Tue Sep 6 12:01:49 UTC 2011
Joseph, I can't spot the problem either. And the dhcp3-server package in
11.10 is new to me (dhcp3-server - ISC DHCP server (transitional package)).
But since your error references not being able to process your
/etc/ltsp/dhcpd.conf file correctly, consider
1) backing it up and regenerating it
2) checking it's read permissions (ls -l )
3) ensure that it's the correct config file (correct name/correct location)
I'll try to remember to check your dhcpd.conf file against mine when I get
to work today.
I think it's unrelated to your dhcp server issue, but make sure you work out
your upstream device (eth0) which might require purging network-manager.
And dont' forget to run *sudo ltsp-update-sshkeys* since you changed your
nics.
but maybe you knew all that...
-peter
On Sat, Sep 3, 2011 at 11:45 AM, David Groos <djgroos at gmail.com> wrote:
> Hey Joseph,
>
> Some things that come to mind...
>
> 1. Are you using "Network Manager"? it seems that that has a different
> way of setting up ip addresses. For example, I was just trying to set up a
> vpn client on my home ubuntu so I could access our district servers. I
> thought I had everything correct but couldn't make it work with editing the
> appropriate config files. So then I tried using
> System-->Preference-->Network Connections and got it set up and it worked
> BUT it also ignored my /etc/network/interfaces config file! So then I had
> to put further info into this application to get my internet and static ip
> back. Lesson here, read up all you can about the issues with Network
> Manager. I know that I ended up removing it while setting up the school
> ltsp server 15 months ago. So, I'm saying that some other config file
> besides /etc/network/interfaces MIGHT be affecting your setup. Sorry I
> don't know more about this.
> 2. A common mistake for me is choosing the netmask--I've never really
> learned the diff between type A and type B/C etc networks, I don't remember
> when I should set this to 255.255.255.0 or 255.255.0.0. so when nothing else
> works I try one then the other. I seem to remember that a 10.x.x.x would
> have the latter? You probably know all this but I thought I would share it
> just in case.
> 3. When you type the command, "ifconfig" into the terminal, what do you
> get? This give some critical info as to what's happening on each of your
> ports. It would be useful (perhaps for myself or someone who knows more
> than I) for you to post the results of ifconfig here.
>
> Good Luck! When it finally works it's sweet!
> David
>
>
> On Fri, Sep 2, 2011 at 11:58 PM, Joseph Bishay <joseph.bishay at gmail.com>wrote:
>
>> Hello,
>>
>> Thanks for your feedback -- I tried mimicking your setting but I still
>> receive the same error. I also did make a point to restart every time
>> I made changes to the configuration files but it also made no
>> difference.
>>
>> Joseph
>>
>> On Fri, Sep 2, 2011 at 10:32 AM, David Groos <djgroos at gmail.com> wrote:
>> > Hi Joseph,
>> > I was looking at your /etc/network/interface file and noticed that all
>> you
>> > have for eth0 is the: "auto eth0" and it doesn't tell how it should
>> connect
>> > such as via dhcp:
>> > auto eth0
>> > iface eth0 inet dhcp
>> >
>> > or take on a static ip as I do on my server such as:
>> > auto eth0
>> > iface eth0 inet static
>> > address 10.51.0.199
>> > netmask 255.255.0.0
>> > gateway 10.51.0.1
>> >
>> > For the connection to the switch/thin/fat clients I use these lines:
>> > auto eth1
>> > iface eth1 inet static
>> > address 192.168.0.1
>> > netmask 255.255.255.0
>> > up iptables-restore < /etc/ltsp/nat
>> >
>> > You didn't mention that you rebooted the server after adjusting the
>> > 70-persistent-net.rules?
>> >
>> > Good luck!
>> > David
>> >
>> > On Thu, Sep 1, 2011 at 11:07 PM, Joseph Bishay <joseph.bishay at gmail.com
>> >
>> > wrote:
>> >>
>> >> Hello,
>> >>
>> >> I hope everyone is doing well.
>> >>
>> >> I have a cleanly installed Edubuntu 11.04 server in the classic 2-NIC
>> >> format. I realized after installation, but before I tried to connect
>> >> any thin clients, that it was better to reverse the NICs so the Intel
>> >> one was running the thin clients. I was able to successfully do so
>> >> via modification of /etc/udev/rules.d/70-persistent-net.rules and
>> >> reversing the two lines.
>> >>
>> >> Now I wanted to try to book a thin client. Took a switch and plugged
>> >> the LTSP NIC from the server and a thin client into the switch. And
>> >> the thin client fails to PXE boot -- can't find the DHCPD server.
>> >>
>> >> Ideally I'd like eth0 to be the Internet NIC and eth1 to be the LTSP
>> >> NIC on the 10.x.x.x. subnet.
>> >>
>> >> So I hunted around and find that the dhcpd3 service is not running.
>> >> Every time I try to run it on the server I get:
>> >>
>> >> sudo service isc-dhcp-server start:
>> >> * Starting ISC DHCP server dhcpd
>> >> * check syslog for diagnostics. [fail]
>> >>
>> >> Checking syslog I get:
>> >>
>> >> eduLTSP dhcpd: Wrote 0 leases to leases file.
>> >> eduLTSP dhcpd:
>> >> eduLTSP dhcpd: No subnet declaration for eth1 (no IPv4 addresses).
>> >> eduLTSP dhcpd: ** Ignoring requests on eth1. If this is not what
>> >> eduLTSP dhcpd: you want, please write a subnet declaration
>> >> eduLTSP dhcpd: in your dhcpd.conf file for the network segment
>> >> eduLTSP dhcpd: to which interface eth1 is attached. **
>> >> eduLTSP dhcpd:
>> >> eduLTSP dhcpd:
>> >> eduLTSP dhcpd: Not configured to listen on any interfaces!
>> >>
>> >> I've tried to search online and tried a bunch of steps but been unable
>> >> to resolve this! Here are the relevant configuration files:
>> >> ---
>> >> jbishay at i7-eduLTSP:~$ cat /etc/networks
>> >> # symbolic names for networks, see networks(5) for more information
>> >> link-local 169.254.0.0
>> >> ---
>> >> jbishay at i7-eduLTSP:/etc/network$ cat interfaces
>> >> auto lo
>> >> iface lo inet loopback
>> >>
>> >> auto eth0
>> >>
>> >> #auto eth1
>> >>
>> >> iface eth1 inet static
>> >> # address 192.168.0.254
>> >> address 10.0.0.254
>> >> netmask 255.255.255.0
>> >> broadcast 10.0.0.255
>> >> ---
>> >> jbishay at i7-eduLTSP:/etc/ltsp$ cat dhcpd.conf
>> >> #
>> >> # Default LTSP dhcpd.conf config file.
>> >>
>> >> authoritative;
>> >>
>> >> subnet 10.0.0.0 netmask 255.255.255.0 {
>> >> range 10.0.0.1 10.0.0.250;
>> >> option domain-name "edultsp.stgr.org";
>> >> option domain-name-servers 192.168.1.1;
>> >> option broadcast-address 10.0.0.255;
>> >> option routers 192.168.1.1;
>> >> # next-server 192.168.0.1;
>> >> # get-lease-hostnames true;
>> >> option subnet-mask 255.255.255.0;
>> >> option root-path "/opt/ltsp/i386";
>> >> if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
>> >> filename "/ltsp/i386/pxelinux.0";
>> >> } else {
>> >> filename "/ltsp/i386/nbi.img";
>> >> }
>> >> }
>> >> ---
>> >> jbishay at i7-eduLTSP:/etc/default$ cat isc-dhcp-server
>> >> # Defaults for dhcp initscript
>> >> # sourced by /etc/init.d/dhcp
>> >> # installed at /etc/default/isc-dhcp-server by the maintainer scripts
>> >> #
>> >> # This is a POSIX shell fragment
>> >> #
>> >> # On what interfaces should the DHCP server (dhcpd) serve DHCP
>> requests?
>> >> # Separate multiple interfaces with spaces, e.g. "eth0 eth1".
>> >> INTERFACES="eth1"
>> >> ---
>> >>
>> >> I believe that is all the relevant files-- if I missed something
>> >> please just tell me and I'll post it here!
>> >>
>> >> So I'm at a loss -- what do you recommend?
>> >>
>> >> Thanks!
>> >> Joseph
>> >>
>> >> --
>> >> edubuntu-users mailing list
>> >> edubuntu-users at lists.ubuntu.com
>> >> Modify settings or unsubscribe at:
>> >> https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
>> >
>> >
>>
>
>
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