Hi, Hi, I will answer because Piotr started vacation yesterday. There is no vrrp service installed on VM, and ip address is added on loopback on both servers. Third server in that environment has installed application (called arbitrator) which check is the real server is alive. If it is alive, then doing nothing. But when the real server is down or http service working on that real server is down, then that server change configuration of allowed_address_pairs. In monday I will make more tests with vrrp service.
BR TomekC. > Wiadomość napisana przez Naveen N <[email protected]> w dniu 29 sie 2015, o > godz. 08:41: > > Hi Piotr, > Contrail-vrouter-agent decides if a IP is address is active based on > 1> If VM interface generates any traffic with source IP as Allowed address > pair IP > 2> VM interface sends a GARP for Allowed address pair IP or if VM responds to > ARP request > for that IP. > > In ur scenario are u running VRRP between active-standby instance? > Is there any VRRP mastership flap? > > Regards > Naveen N > > > From: Users <[email protected]> on behalf of Piotr P > <[email protected]> > Sent: Friday, August 28, 2015 7:36 PM > To: <[email protected]> > Subject: [Users] Allowed address pair on multiple virtual interfaces. > > > > I've assigned allowed_address_pairs to two ports belonging to different > virtual machines. > We have need to attach additional address that could be switched over in case > application failure on a VM. It could work in active-standby fashion. > > > While this address is assigned via neutron for both VM we starting to seeing > often BGP updates. > Those updates are visible on the gateway and for XMPP and iBGP routes in > Contrail for prefix 100.10.10.251/32 <http://100.10.10.251/32>. > > > It seems that this update occurs maily about every 90 seconds, but also it > can happen after 20 seconds. > First port is selected for most of the time. However second port can be > announced as best path for shorter time like 20 seconds. > > Routes for fixed ips are stable. > > Does this is known behaviour or it could be some kind of route flapping > between compute nodes ? > Is it allowed or possible for contrail to have allowed address pairs assigned > to multiple interface at the same time? > > > Following is short example how these allowed_address_pairs are visible in > neutron. > > $ neutron port-show d196a3e5-d905-4121-ba01-d7541a7a42b5 > +-----------------------+--------------------------------------------------------------------------------------+ > | Field | Value > | > +-----------------------+--------------------------------------------------------------------------------------+ > | admin_state_up | True > | > | allowed_address_pairs | {"ip_address": "100.10.10.251", "mac_address": > ["02:d1:96:a3:e5:d9"]} | > | > | fixed_ips | {"subnet_id": > "e8c7d350-f539-422f-b8b1-0b5f83f5f16e", "ip_address": "100.10.10.12"} | > | id | d196a3e5-d905-4121-ba01-d7541a7a42b5 > | > | mac_address | 02:d1:96:a3:e5:d9 > | > | > +-----------------------+--------------------------------------------------------------------------------------+ > > $ neutron port-show 2a2b95aa-6d0b-4487-838d-80c3f8540cbd > +-----------------------+--------------------------------------------------------------------------------------+ > | Field | Value > | > +-----------------------+--------------------------------------------------------------------------------------+ > | admin_state_up | True > | > | allowed_address_pairs | {"ip_address": "100.10.10.251", "mac_address": > ["02:2a:2b:95:aa:6d"]} | > | > | fixed_ips | {"subnet_id": > "e8c7d350-f539-422f-b8b1-0b5f83f5f16e", "ip_address": "100.10.10.13"} | > | id | 2a2b95aa-6d0b-4487-838d-80c3f8540cbd > | > | mac_address | 02:2a:2b:95:aa:6d > | > +-----------------------+--------------------------------------------------------------------------------------+ > > Occurences of updates: > > last_modified: "2015-Aug-28 13:45:20.636004", > last_modified: "2015-Aug-28 13:47:00.799524", > last_modified: "2015-Aug-28 13:48:40.931728", > last_modified: "2015-Aug-28 13:50:24.904813", > last_modified: "2015-Aug-28 13:50:56.552607", > > > Changes visible at the gateway > > > 100.10.10.251/32 <http://100.10.10.251/32> *[BGP/170] 00:00:19, localpref > 100, from 10.0.0.11 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32769, Push 16 > [BGP/170] 00:00:19, localpref 100, from 10.0.0.12 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32769, Push 16 > [BGP/170] 00:00:19, localpref 100, from 10.0.0.13 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32769, Push 16 > > > 100.10.10.251/32 <http://100.10.10.251/32> *[BGP/170] 00:00:00, localpref > 100, from 10.0.0.11 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32774, Push 16 > [BGP/170] 00:00:00, localpref 100, from 10.0.0.12 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32774, Push 16 > [BGP/170] 00:00:00, localpref 100, from 10.0.0.13 > AS path: 64799 ?, validation-state: unverified > > via gr-0/3/0.32774, Push 16 > > > Kind Regards > Piotr Pieprzycki > _______________________________________________ > Users mailing list > [email protected] > http://lists.opencontrail.org/mailman/listinfo/users_lists.opencontrail.org
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