On Sun, 2005-08-28 at 17:51 -0700, Antonio Olivares wrote:
Dear folks,
Recently at work, the network administrators
changed from static ip's to dhcp. They made changes
to use static dhcp using the mac address of the
machines connected to the network. Before I could
connect to the network using something like
[root@rio ~]# ifconfig eth0 10.154.20.157 netmask
255.255.248.0
[root@rio ~]# route add default gateway 10.154.16.1
[root@rio ~]# echo nameserver 10.128.0.4 >>
/etc/resolv.conf
Here's the info of that machine's connection after
system administrator connected the machine using mac
address.
[root@rio ~]# ifconfig -a
eth0 Link encap:Ethernet HWaddr
00:50:2C:A6:19:28
inet addr:10.154.19.136 Bcast:10.154.19.255
Mask:255.255.255.0
inet6 addr: fe80::250:2cff:fea6:1928/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:2511 errors:0 dropped:0
overruns:0 frame:0
TX packets:1766 errors:0 dropped:0
overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1405141 (1.3 MiB) TX bytes:307686
(300.4 KiB)
Interrupt:11 Base address:0xae00
[root@rio ~]#
Now I cannot get network access. Even with dhcp
enabled. The network identifies the mac address of
the machine and assigns the same ip throughout.
Are you getting a gateway route added?
Are you getting a DNS server provided?
The gateway would need to be in the same (new) class C address space and
the static gateway entry would need to be removed.
I want to add an extra NIC/LAN card to this machine
call it eth1 and use the machine as a host for a small
network so that I can use/share the internet access
with other machines. I ask for advice/help on this
issue. I have read the following
http://www.tldp.org/HOWTO/DHCP/index.html
and
http://www.linux-mag.com/2000-04/networknirvana_01.html
What are the contents of /etc/sysconfig/network-scripts/ifcfg-eth0
and /etc/sysconfig/network ?
That is where you enable the necessary settings for hostname, gateway,
etc when doing static IPs, and the settings are different to use dhcp.
but I am not sure how to begin. I have not placed the
nic card yet on the machine but I will do so tomorrow.
The machine has Fedora Core 3 with an everything
install. What do I need to setup a mini dhcp server
from this machine?
Right now you are trying to set up a dhcp client so this machine has
access to the internet via eth0. A dhcp server is also simple, but is
not a factor in the problem you are describing.
When you set up the dhcp server you will need to restrict it to
answering only on the appropriate interface and set the appropriate
address range. You will also have a routing issue to handle.
Adding a second nic may have some surprises. It may get the name eth0
and the existing one may become eth1, depending on the order devices are
probed.
Thanks in advance,
Antonio