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can't ping floating ip

asked 2012-11-23 08:41:16 -0500

caiqishen gravatar image

I have installed Openstack folsom and quantum,it looks like that everything works well except the floating ip. when i associate a floating ip to a port, i can only ping it int that namespace.10.10.9.0/24 is the fixed ip pool and 10.107.219.140/30 is the floating ip pool. I assigned 10.107.219.185 on br-ex as the management ip. It looks like the following: root@ubuntu-control:~/Desktop# ping 10.107.219.142 PING 10.107.219.142 (10.107.219.142) 56(84) bytes of data. From 10.107.219.185 icmp_seq=1 Destination Host Unreachable From 10.107.219.185 icmp_seq=2 Destination Host Unreachable From 10.107.219.185 icmp_seq=3 Destination Host Unreachable ^Z [5]+ Stopped ping 10.107.219.142

root@ubuntu-control:~/Desktop# ip netns exec qrouter-7bc7440c-f7ce-4c08-b0c5-d85676b13902 ping 10.107.219.142 PING 10.107.219.142 (10.107.219.142) 56(84) bytes of data. 64 bytes from 10.107.219.142: icmp_req=1 ttl=64 time=36.2 ms 64 bytes from 10.107.219.142: icmp_req=2 ttl=64 time=0.223 ms 64 bytes from 10.107.219.142: icmp_req=3 ttl=64 time=0.137 ms ^Z [6]+ Stopped ip netns exec qrouter-7bc7440c-f7ce-4c08-b0c5-d85676b13902 ping 10.107.219.142

root@ubuntu-control:~/Desktop# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.107.219.1 0.0.0.0 UG 0 0 0 br-ex 10.107.219.0 0.0.0.0 255.255.255.0 U 0 0 0 br-ex 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth1

root@ubuntu-control:~/Desktop# ip netns exec qrouter-7bc7440c-f7ce-4c08-b0c5-d85676b13902 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.10.9.0 0.0.0.0 255.255.255.0 U 0 0 0 qr-86b7b3e1-2a 10.107.219.140 0.0.0.0 255.255.255.252 U 0 0 0 qg-e3c6631b-92

Bridge br-ex Port "eth0" Interface "eth0" Port br-ex Interface br-ex type: internal Port "qg-e3c6631b-92" Interface "qg-e3c6631b-92" type: internal

br-ex Link encap:Ethernet HWaddr 70:7b:e8:ed:1a:d8
inet addr:10.107.219.185 Bcast:10.107.219.255 Mask:255.255.255.0 UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:1617547 errors:0 dropped:0 overruns:0 frame:0 TX packets:531487 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:234012342 (234.0 MB) TX bytes:1443016776 (1.4 GB)

I have followed the suggestion where the question "can't ping router's ip" provides, but it didn't work. Any one can explain why i can't ping the floating ip?

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answered 2012-11-27 03:49:54 -0500

caiqishen gravatar image

I have solved this problem. It is because that the floating ip pool is not in the same subnet with the ip of br-ex

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answered 2012-11-24 01:40:23 -0500

gongysh gravatar image

Have u enabled the VM's ssh port by security group: nova secgroup-add-rule default icmp -1 -1 0.0.0.0/0 ?

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answered 2012-11-24 06:56:08 -0500

caiqishen gravatar image

Thank you, yong sheng gong, I have add this rule, it llooks like the following

root@ubuntu-control:/# nova secgroup-list-rules default +-------------+-----------+---------+-----------+--------------+ | IP Protocol | From Port | To Port | IP Range | Source Group | +-------------+-----------+---------+-----------+--------------+ | icmp | -1 | -1 | 0.0.0.0/0 | | | tcp | 22 | 22 | 0.0.0.0/0 | | +-------------+-----------+---------+-----------+--------------+

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answered 2012-11-24 07:33:30 -0500

caiqishen gravatar image

I think the packet doesn't go into the router's namespace when i "ping 10.107.219.142" and "ip netns exec qrouter-7bc7440c-f7ce-4c08-b0c5-d85676b13902 tcpdump arp -i qg-e3c6631b-92", i catch nothing, but when i execute "tcpdump arp -i eth0", i got this "15:32:00.686586 ARP, Request who-has 10.107.219.142 tell ubuntu-compute-3.local, length 46".

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Asked: 2012-11-23 08:41:16 -0500

Seen: 123 times

Last updated: Nov 27 '12