Hi! Do you have Neutron DVR enabled? Multiple Network nodes? Tomas -----Original Message----- From: Brian Haley [mailto:haleyb....@gmail.com] Sent: Tuesday, June 20, 2017 3:30 AM To: Ken D'Ambrosio Cc: Openstack Subject: Re: [Openstack] Floating IP issues in multiple cloud installs.
On 06/19/2017 08:51 AM, Ken D'Ambrosio wrote: > Hi, all. We've got two Canonical Newton installs using VLANs and > we're having intermittent issues we simply can't figure out. (Note > that a third installation using flat networks is not having this > issue.) Floating IPs set up and work... sporadically. > > * Stateful connections (e.g., SSH) often drop after seconds of use to > both the FIP and when SSH'd in from the > * We see RSTs in our TCP dumps > * Pings work for a while, then don't. > * We see lots of ARP requests -- even one right after another -- to > resolve hosts on the internal subnets: > 05:43:25.859448 ARP, Request who-has 80.0.0.3 tell 80.0.0.1, length 28 > 05:43:25.859563 ARP, Reply 80.0.0.3 is-at fa:16:3e:28:af:77, length 28 > 05:43:25.964417 ARP, Request who-has 80.0.0.3 tell 80.0.0.1, length 46 > 05:43:25.964572 ARP, Reply 80.0.0.3 is-at fa:16:3e:28:af:77, length 28 > 05:43:26.963989 ARP, Request who-has 80.0.0.3 tell 80.0.0.1, length 46 > 05:43:26.964156 ARP, Reply 80.0.0.3 is-at fa:16:3e:28:af:77, length 28 Was that run with '-i any' or on a single interface? I would check the ARP cache to make sure things entries are in a complete/reachable state. Or even syslog for any other errors. > 80.0.0.1 is the qrouter. I can't imagine why it asked -- and was > ACK'd in each case -- three times in just over a second. In > hindsight, I should have checked to have seen if the ACK showed up in > the qrouter's ARP table. Next time... I'd also specify -e to tcpdump to see the MACs involved. Possibly there is something else configured with the same IP on the VLAN (shouldn't happen, but worth checking). -Brian _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
