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Help in DHCP Server [message #39851]

Thu, 10 June 2010 15:14

f.sivas
Messages: 4
Registered: April 2010

Junior Member

I have a Debian 5.0 machine with linux-image-2.6.26-2-openvz-686.
With 2 network cards. One is eth0 conected to the modem, the other is eth1 with a static ip (192.168.1.9) conected to an wireless acess point.
At the moment i'v got in the node the DHCP Server runing because i can´t configure it in a virtual machine. What i did was:

First off all stop the dhcp server in the hardware node and unconfigure eth1.

[host-node]:~# ifconfig -a
eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:xxx.xxx.xxx.xxx  Bcast:xxx.xxx.xxx.xxx  Mask:255.255.240.0
          inet6 addr: fe80::221:85ff:fe15:bedf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5320 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3222 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6549594 (6.2 MiB)  TX bytes:326786 (319.1 KiB)
          Interrupt:221

eth1      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16 Base address:0xe800

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:2459 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4428 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:143700 (140.3 KiB)  TX bytes:6383660 (6.0 MiB)

Then add veth device to CT

[host-node]:~# vzctl set 107 --netif_add eth1 --save

[host-node]:~# ifconfig -a
eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:xxx.xxx.xxx.xxx   Bcast:xxx.xxx.xxx.xxx   Mask:255.255.240.0
          inet6 addr: fe80::221:85ff:fe15:bedf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5414 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3254 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6575652 (6.2 MiB)  TX bytes:333920 (326.0 KiB)
          Interrupt:221

eth1      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16 Base address:0xe800

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:2503 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4472 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:147327 (143.8 KiB)  TX bytes:6387674 (6.0 MiB)

veth107.1 Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet6 addr: fe80::218:51ff:fea1:8375/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Then configure device in CT

[host-node]# ifconfig veth107.1 0
[host-node]# echo 1 > /proc/sys/net/ipv4/conf/veth107.1/forwarding
[host-node]# echo 1 > /proc/sys/net/ipv4/conf/veth107.1/proxy_arp
[host-node]# echo 1 > /proc/sys/net/ipv4/conf/eth1/forwarding
[host-node]# echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp

# Configure device in CT107

[ve-101]# ifconfig eth1 0
[ve-101]# ip addr add 192.168.1.9 dev eth1
[ve-101]# ip route add default dev eth1
# RTNETLINK answers: File exists
dhcp:/# ip route
192.0.2.1 dev venet0  scope link
default via 192.0.2.1 dev venet0
[ve-101]# ip route del default via 192.0.2.1 dev venet0
[ve-101]# ip route add default dev eth1

Add route in CT0

[host-node]# ip route add 192.168.1.9 dev veth107.1

After this

[ve-101]# apt-get install dhcp3-server

The strange is that i can ping 192.168.1.9 but the clients can´t get any leases.
Can someone help me in the configuration?
Thanks.

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[Message index]

		Help in DHCP Server By: f.sivas on Thu, 10 June 2010 15:14
		Re: Help in DHCP Server By: f.sivas on Fri, 11 June 2010 01:28
		Re: Help in DHCP Server By: maratrus on Fri, 11 June 2010 11:32

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