Thin clients not booting - help?
David Groos
djgroos at gmail.com
Sat Sep 3 15:45:30 UTC 2011
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
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/edubuntu-users/attachments/20110903/e6bea306/attachment.html>
More information about the edubuntu-users
mailing list