Hello again Rick! > On 03/13/2015 06:25 PM, Georgios Dimitrakakis wrote: >> If I do an : >> >> arping -U -I etho x.x.x.x >> >> where x.x.x.x is the IP address. >> >> I can almost immediately access them outside of the subnet! > > I had forgotten that, Still is that the very same set of options the > OpenStack code uses? I am not aware about that and I would like to know! What does Openstack does and how ofted does it send the gratuitous ARP request? > >> Do you mean that OpenStack is sending a gratuitous ARP for all >> and the router is ignoring them unless it is for a specific IP >> address? >> >> If this is the case is there anything I can do? > > I will second the suggestion of getting a packet trace to see just > what sort of ARP traffic the compute node(s) send and then compare > that with the documentation for your router. > > rick > I will try to see if I can get anything but the problem is that the datacenter hosting the facility is in Japan and there is a huge gap communicating with them (actually there is no communication). If I could only find out what does the router accept would be very nice :-) Best, George >> >> Regards, >> >> George >> >> >>> On 03/13/2015 04:55 PM, Georgios Dimitrakakis wrote: >>>> The value is 10 >>>> >>>> Do you believe that it should be bigger? >>> >>> These accesses of instances which are being delayed by 20 minutes - >>> are they delayed for other instances in the subnet, or just for >>> accesses from outside the subnet (ie through a real router)? >>> >>> There may be some rather "conservative" routers out there which >>> might >>> not accept gratuitous ARPs, considering it more secure to ARP for >>> those IPs explicitly itself. >>> >>> rick jones >>> >>> >>> _______________________________________________ >>> Mailing list: >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >>> Post to : openstack at 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 at 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 at lists.openstack.org > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack