Could this Mirantis' post help you? http://www.mirantis.com/blog/vlanmanager-network-flow-analysis/
--- JuanFra 2013/4/9 Lei Zhang <zhang.lei....@gmail.com> > I am using: Folsom, nova-network, vlanManage, multi_host=ture > > I want to know what's the package flow between the vms which located in > the same physical machine. > > Here is the typology. I want to know want happen if I ping 192.168.3.47 in > vm7. > > When the NAT is applied? > > |vm: fixed: 10.0.104.5, floating: > 192.168.3.56|-----|vnet15|----|br104|----|vnet14|----| vm7: fixed: > 10.0.104.6, floating: 192.168.3.57| > > if the net.bridge.bridge-nf-call-iptables=0, I can not see the NAT > properly. > > [root@openstack-node1 ~]# tcpdump -i vnet14 -l -ne icmp -v > tcpdump: WARNING: vnet14: no IPv4 address assigned > tcpdump: listening on vnet14, link-type EN10MB (Ethernet), capture size 65535 > bytes > 17:11:10.275818 fa:16:3e:3e:ab:8f > fa:16:3e:72:8f:b4, ethertype IPv4 > (0x0800), length 98: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP > (1), length 84) > 10.0.104.6 > 192.168.3.56: ICMP echo request, id 31090, seq 1, length 64 > 17:11:10.277546 fa:16:3e:22:31:09 > fa:16:3e:3e:ab:8f, ethertype IPv4 > (0x0800), length 98: (tos 0x0, ttl 64, id 64703, offset 0, flags [none], > proto ICMP (1), length 84) > 10.0.104.5 > 10.0.104.6: ICMP echo reply, id 31090, seq 1, length 64 > > When net.bridge.bridge-nf-call-iptables=1, I found the NAT properly. But I > also found it is said the bridge filter should be disabled in > http://docs.openstack.org/trunk/openstack-compute/admin/content/network-troubleshooting.html. > Is this true? > > > [root@openstack-node1 ~]# tcpdump -i vnet14 -l -ne icmp -v > tcpdump: WARNING: vnet14: no IPv4 address assigned > tcpdump: listening on vnet14, link-type EN10MB (Ethernet), capture size 65535 > bytes > 17:13:40.507577 fa:16:3e:3e:ab:8f > fa:16:3e:72:8f:b4, ethertype IPv4 > (0x0800), length 98: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto ICMP > (1), length 84) > 10.0.104.6 > 192.168.3.56: ICMP echo request, id 42098, seq 1, length 64 > 17:13:40.508034 fa:16:3e:22:31:09 > fa:16:3e:3e:ab:8f, ethertype IPv4 > (0x0800), length 98: (tos 0x0, ttl 64, id 64704, offset 0, flags [none], > proto ICMP (1), length 84) > 192.168.3.56 > 10.0.104.6: ICMP echo reply, id 42098, seq 1, length 64 > > -- > Lei Zhang > > Blog: http://jeffrey4l.github.com > twitter/weibo: @jeffrey4l > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > >
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