openstack team mailing list archive

[Javier Alvarez <javier.alvarez@xxxxxx>]

Hello,

I'm having troubles with the network configuration in a compute node. I 
followed this tutorial:

http://www.mirantis.com/blog/openstack-networking-single-host-flatdhcpmanager/

But my instances are unable to get an IP via DHCP. The network 
configuration in the compute node when an instance is running is as follows:

> ifconfig

br100     Link encap:Ethernet  HWaddr fe:16:3e:3b:3f:ef
          inet6 addr: fe80::b0e3:fdff:fe8f:ae5f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:132 errors:0 dropped:0 overruns:0 frame:0
          TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:24372 (23.8 KiB)  TX bytes:2790 (2.7 KiB)

eth0      Link encap:Ethernet  HWaddr 68:b5:99:c2:3b:04
          inet addr:172.16.8.21  Bcast:172.16.8.255 Mask:255.255.255.0
          inet6 addr: fe80::6ab5:99ff:fec2:3b04/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12559093 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5842385 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:11928155434 (11.1 GiB)  TX bytes:636265975 (606.7 MiB)
          Memory:fe860000-fe880000

eth2      Link encap:Ethernet  HWaddr 68:b5:99:c2:3b:0e
          UP BROADCAST PROMISC 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)
          Memory:fe760000-fe780000

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:156854 errors:0 dropped:0 overruns:0 frame:0
          TX packets:156854 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1140082417 (1.0 GiB)  TX bytes:1140082417 (1.0 GiB)

vnet0     Link encap:Ethernet  HWaddr fe:16:3e:3b:3f:ef
          inet6 addr: fe80::fc16:3eff:fe3b:3fef/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:1310 (1.2 KiB)  TX bytes:1956 (1.9 KiB)

> brctl show

bridge name     bridge id               STP enabled     interfaces
br100           8000.fe163e3b3fef       no              vnet0

Also, tcpdump in br100 shows the DHCP being broadcasted (I think):

12:54:17.895215 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, 
Request from fa:16:3e:7e:eb:2e (oui Unknown), length 280
12:54:20.899472 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, 
Request from fa:16:3e:7e:eb:2e (oui Unknown), length 280

But they never get to eth2, any help?

Thanks,

Javi

--
Javier Álvarez Cid-Fuentes
Grid Computing and Clusters Group
Barcelona Supercomputing Center (BSC-CNS)
Tel. (+34) 93 413 72 46


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