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
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