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Installed Openstack, but Host created on Neutron is not having access to Internet.

asked 2015-04-27 05:38:14 -0500

Ahin Shaw gravatar image

Hi All,

Have created a new host on Neutron, the NIC address is 172.16.10.2 and assigned a floating IP 172.21.4.101. The floating IP subnet 172.21.4.0/24 is the external network. Whenever I try pinging the gateway 172.21.4.1 and internet 4.2.2.2 I get Request Timed Out. When I do a traceroute, First hop reached 172.16.10.1 which is the Virtual Router Address and then it goes to second hop which is 172.21.4.101 which is the floating IP and shows "!H" and then it finishes.

Routing between the subnet 172.21.4.0/24 and internet is working fine, as if the plug in any server in the same subnet with flat IP 172.21.4.50/24 with gateway 172.21.4.1 internet works fine.

Any thoughts if I need to configure anything else.

Many Thanks! Ahin Shaw

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answered 2015-04-27 12:41:10 -0500

dbaxps gravatar image

updated 2015-04-27 12:47:20 -0500

Use as comment :-
When you ping 172.21.4.101. Run on compute node brctll show on compute node

# brctl show
bridge name bridge id       STP enabled interfaces
qbr17d5d5af-34      8000.ded1f35d41b8   no      qvb17d5d5af-34
qbre8837e97-91      8000.c23b488bacc1   no      qvbe8837e97-91
                            tape8837e97-91
qbrfec6125b-76      8000.16f6bf558d0f   no      qvbfec6125b-76

Then run tcpdump -vv -i tape8837e97-91 && see would VM respond , then tcpdump -vv -i qvoe8837e97-91 from veth pair ( qvoe8837e97-91, qvbe8837e97-91), e.g. trace all devices on the way from br-int to br-ex by tcpdump, ovs-ofctl dump-flows br-tun && locate point of failure.

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Asked: 2015-04-27 05:38:14 -0500

Seen: 91 times

Last updated: Apr 27 '15