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Old 12-12-2007, 01:18 PM
"Timothy Boyden"
 
Default Secondary DHCP configuration question

Sorry if I'm repeating
questions here, haven't figured out a good way to search the
archives...


My office is part of a
larger corporate network infrastructure and we do not have control over the
network DNS settings. Is there a way to configure the Edubuntu DHCP server or
the clients to to talk directly to the Edubuntu server? My clients successfully
get the boot loader but are not able to mount the root file system and it
appears when I press ctrl-alt-F1 that the two DHCP servers are fighting. My
current DHCPD.conf is below:


ddns-update-style
none;
not authoritative;
default-lease-time 600;
max-lease-time
7200;
option domain-name "supercoups.local";
option subnet-mask
255.255.255.0;
option broadcast-address 10.100.54.255;
option routers
10.100.54.9;
option domain-name-servers 10.100.54.9;
next-server
10.100.54.9;
option root-path "/opt/ltsp/i386";
filename
"/ltsp/i386/pxelinux.0";
shared-network ltsp {
subnet 10.100.54.0 netmask
255.255.255.0 {
}
}
#
# Netboot Clients
#
host graphics1
{
hardware ethernet 00:0d:60:7b:33:a3;
fixed-address
10.100.54.10;
}


*

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Old 12-12-2007, 02:43 PM
"Harry Sweet"
 
Default Secondary DHCP configuration question

You probably do not want the clients to see both DHCP servers!

Think about your topology. If the clients can only connect to the edubuntu
server physically they will not be a conflict because they do not connect to the corporate server, only LTSP.

client-----(eth1)---Edubuntu---(eth0)------The rest of the network-------------Gateway, Router, world......

Make sure that your DHCP is only serving eth1 (in this example) or your network administrator
will be very, very mad at you : )

We've set up a simple system with a $12 Ethernet switch so we can choose which DHCP server to connect
our lab to.


>>> "Timothy Boyden" <tboyden@supercoups.com> 12/12/2007 9:18 AM >>>
Sorry if I'm repeating questions here, haven't figured out a good way to
search the archives...

My office is part of a larger corporate network infrastructure and we do
not have control over the network DNS settings. Is there a way to
configure the Edubuntu DHCP server or the clients to to talk directly to
the Edubuntu server? My clients successfully get the boot loader but are
not able to mount the root file system and it appears when I press
ctrl-alt-F1 that the two DHCP servers are fighting. My current
DHCPD.conf is below:

ddns-update-style none;
not authoritative;
default-lease-time 600;
max-lease-time 7200;
option domain-name "supercoups.local";
option subnet-mask 255.255.255.0;
option broadcast-address 10.100.54.255;
option routers 10.100.54.9;
option domain-name-servers 10.100.54.9;
next-server 10.100.54.9;
option root-path "/opt/ltsp/i386";
filename "/ltsp/i386/pxelinux.0";
shared-network ltsp {
subnet 10.100.54.0 netmask 255.255.255.0 {
}
}
#
# Netboot Clients
#
host graphics1 {
hardware ethernet 00:0d:60:7b:33:a3;
fixed-address 10.100.54.10;
}





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Old 12-12-2007, 03:00 PM
"Timothy Boyden"
 
Default Secondary DHCP configuration question

Easier said then done I'm afraid, in a lab environment it would be
relatively easy to separate the lab network from a larger network, not
so in an office environment where clients are dispersed around the
office. The clients do not connect to the server physically, they
connect through the office switch.

We do run a Cisco based network, so maybe there is a way to create a
VLAN to accomplish the same effect. But I'm not sure on how to do that,
has anyone out there done this?

Thanks,

Tim

-----Original Message-----
From: Harry Sweet [mailto:hsweet@gcsny.org]
Sent: Wednesday, December 12, 2007 10:43 AM
To: Edubuntu Community; Timothy Boyden
Subject: Re: Secondary DHCP configuration question

You probably do not want the clients to see both DHCP servers!

Think about your topology. If the clients can only connect to the
edubuntu server physically they will not be a conflict because they do
not connect to the corporate server, only LTSP.

client-----(eth1)---Edubuntu---(eth0)------The rest of the
network-------------Gateway, Router, world......

Make sure that your DHCP is only serving eth1 (in this example) or your
network administrator will be very, very mad at you : )

We've set up a simple system with a $12 Ethernet switch so we can choose
which DHCP server to connect our lab to.


>>> "Timothy Boyden" <tboyden@supercoups.com> 12/12/2007 9:18 AM >>>
Sorry if I'm repeating questions here, haven't figured out a good way to
search the archives...

My office is part of a larger corporate network infrastructure and we do
not have control over the network DNS settings. Is there a way to
configure the Edubuntu DHCP server or the clients to to talk directly to
the Edubuntu server? My clients successfully get the boot loader but are
not able to mount the root file system and it appears when I press
ctrl-alt-F1 that the two DHCP servers are fighting. My current
DHCPD.conf is below:

ddns-update-style none;
not authoritative;
default-lease-time 600;
max-lease-time 7200;
option domain-name "supercoups.local";
option subnet-mask 255.255.255.0;
option broadcast-address 10.100.54.255;
option routers 10.100.54.9;
option domain-name-servers 10.100.54.9;
next-server 10.100.54.9;
option root-path "/opt/ltsp/i386";
filename "/ltsp/i386/pxelinux.0";
shared-network ltsp {
subnet 10.100.54.0 netmask 255.255.255.0 { } } # # Netboot Clients #
host graphics1 { hardware ethernet 00:0d:60:7b:33:a3; fixed-address
10.100.54.10; }





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Old 12-12-2007, 03:30 PM
"Timothy Boyden"
 
Default Secondary DHCP configuration question

OK, I got a little farther, I added the following to
/var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default:

nfsroot=10.100.54.9:/opt/ltsp/i386

This allowed the NetBoot client to bootup from the LTSP server. However
it is not accepting my username and password to login. Any ideas? I
found a clue to the above from the Debian-EDU documentation from here:
http://wiki.debian.org/DebianEdu/HowTo/LtspDisklessWorkstation#head-26f1
2e766954393f43559e19868f5b947e50e185

If I didn't mention it already, I'm running the Edubuntu 7.04 server
edition.

Thanks,

Tim

-----Original Message-----
From: edubuntu-users-bounces@lists.ubuntu.com
[mailto:edubuntu-users-bounces@lists.ubuntu.com] On Behalf Of Timothy
Boyden
Sent: Wednesday, December 12, 2007 11:01 AM
To: Edubuntu Community
Subject: RE: Secondary DHCP configuration question

Easier said then done I'm afraid, in a lab environment it would be
relatively easy to separate the lab network from a larger network, not
so in an office environment where clients are dispersed around the
office. The clients do not connect to the server physically, they
connect through the office switch.

We do run a Cisco based network, so maybe there is a way to create a
VLAN to accomplish the same effect. But I'm not sure on how to do that,
has anyone out there done this?

Thanks,

Tim

-----Original Message-----
From: Harry Sweet [mailto:hsweet@gcsny.org]
Sent: Wednesday, December 12, 2007 10:43 AM
To: Edubuntu Community; Timothy Boyden
Subject: Re: Secondary DHCP configuration question

You probably do not want the clients to see both DHCP servers!

Think about your topology. If the clients can only connect to the
edubuntu server physically they will not be a conflict because they do
not connect to the corporate server, only LTSP.

client-----(eth1)---Edubuntu---(eth0)------The rest of the
network-------------Gateway, Router, world......

Make sure that your DHCP is only serving eth1 (in this example) or your
network administrator will be very, very mad at you : )

We've set up a simple system with a $12 Ethernet switch so we can choose
which DHCP server to connect our lab to.


>>> "Timothy Boyden" <tboyden@supercoups.com> 12/12/2007 9:18 AM >>>
Sorry if I'm repeating questions here, haven't figured out a good way to
search the archives...

My office is part of a larger corporate network infrastructure and we do
not have control over the network DNS settings. Is there a way to
configure the Edubuntu DHCP server or the clients to to talk directly to
the Edubuntu server? My clients successfully get the boot loader but are
not able to mount the root file system and it appears when I press
ctrl-alt-F1 that the two DHCP servers are fighting. My current
DHCPD.conf is below:

ddns-update-style none;
not authoritative;
default-lease-time 600;
max-lease-time 7200;
option domain-name "supercoups.local";
option subnet-mask 255.255.255.0;
option broadcast-address 10.100.54.255;
option routers 10.100.54.9;
option domain-name-servers 10.100.54.9;
next-server 10.100.54.9;
option root-path "/opt/ltsp/i386";
filename "/ltsp/i386/pxelinux.0";
shared-network ltsp {
subnet 10.100.54.0 netmask 255.255.255.0 { } } # # Netboot Clients #
host graphics1 { hardware ethernet 00:0d:60:7b:33:a3; fixed-address
10.100.54.10; }





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Old 12-12-2007, 04:22 PM
"Timothy Boyden"
 
Default Secondary DHCP configuration question

Whoohoo! I solved it myself and I'm in like slim.

I thought I had done this previously but I had to run
ltsp-update-sshkeys to re-issue the SSH keys for the LTSP server. After
doing that the netboot client now connects. Phew!

-Tim

-----Original Message-----
From: edubuntu-users-bounces@lists.ubuntu.com
[mailto:edubuntu-users-bounces@lists.ubuntu.com] On Behalf Of Timothy
Boyden
Sent: Wednesday, December 12, 2007 11:30 AM
To: Edubuntu Community
Subject: RE: Secondary DHCP configuration question

OK, I got a little farther, I added the following to
/var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default:

nfsroot=10.100.54.9:/opt/ltsp/i386

This allowed the NetBoot client to bootup from the LTSP server. However
it is not accepting my username and password to login. Any ideas? I
found a clue to the above from the Debian-EDU documentation from here:
http://wiki.debian.org/DebianEdu/HowTo/LtspDisklessWorkstation#head-26f1
2e766954393f43559e19868f5b947e50e185

If I didn't mention it already, I'm running the Edubuntu 7.04 server
edition.

Thanks,

Tim

-----Original Message-----
From: edubuntu-users-bounces@lists.ubuntu.com
[mailto:edubuntu-users-bounces@lists.ubuntu.com] On Behalf Of Timothy
Boyden
Sent: Wednesday, December 12, 2007 11:01 AM
To: Edubuntu Community
Subject: RE: Secondary DHCP configuration question

Easier said then done I'm afraid, in a lab environment it would be
relatively easy to separate the lab network from a larger network, not
so in an office environment where clients are dispersed around the
office. The clients do not connect to the server physically, they
connect through the office switch.

We do run a Cisco based network, so maybe there is a way to create a
VLAN to accomplish the same effect. But I'm not sure on how to do that,
has anyone out there done this?

Thanks,

Tim

-----Original Message-----
From: Harry Sweet [mailto:hsweet@gcsny.org]
Sent: Wednesday, December 12, 2007 10:43 AM
To: Edubuntu Community; Timothy Boyden
Subject: Re: Secondary DHCP configuration question

You probably do not want the clients to see both DHCP servers!

Think about your topology. If the clients can only connect to the
edubuntu server physically they will not be a conflict because they do
not connect to the corporate server, only LTSP.

client-----(eth1)---Edubuntu---(eth0)------The rest of the
network-------------Gateway, Router, world......

Make sure that your DHCP is only serving eth1 (in this example) or your
network administrator will be very, very mad at you : )

We've set up a simple system with a $12 Ethernet switch so we can choose
which DHCP server to connect our lab to.


>>> "Timothy Boyden" <tboyden@supercoups.com> 12/12/2007 9:18 AM >>>
Sorry if I'm repeating questions here, haven't figured out a good way to
search the archives...

My office is part of a larger corporate network infrastructure and we do
not have control over the network DNS settings. Is there a way to
configure the Edubuntu DHCP server or the clients to to talk directly to
the Edubuntu server? My clients successfully get the boot loader but are
not able to mount the root file system and it appears when I press
ctrl-alt-F1 that the two DHCP servers are fighting. My current
DHCPD.conf is below:

ddns-update-style none;
not authoritative;
default-lease-time 600;
max-lease-time 7200;
option domain-name "supercoups.local";
option subnet-mask 255.255.255.0;
option broadcast-address 10.100.54.255;
option routers 10.100.54.9;
option domain-name-servers 10.100.54.9;
next-server 10.100.54.9;
option root-path "/opt/ltsp/i386";
filename "/ltsp/i386/pxelinux.0";
shared-network ltsp {
subnet 10.100.54.0 netmask 255.255.255.0 { } } # # Netboot Clients #
host graphics1 { hardware ethernet 00:0d:60:7b:33:a3; fixed-address
10.100.54.10; }





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