Hi Andrea, Though both interfaces come up, only one will response to the ping from the neutron router. When I disable it, then the second one will response to ping. So it looks like only one interface is useful at a time.
My question is is there any useful case for this, I.e. Why would you do this? Thanks, Danny Date: Tue, 2 Dec 2014 10:44:57 +0000 From: Andrea Frittoli <andrea.fritt...@gmail.com<mailto:andrea.fritt...@gmail.com>> To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev@lists.openstack.org<mailto:openstack-dev@lists.openstack.org>> Subject: Re: [openstack-dev] [qa] Should it be allowed to attach 2 interfaces from the same subnet to a VM? Message-ID: <cab7wygv4+ji-tj5jkvg98kw0hxot8zlnuk+nzvjywfdijio...@mail.gmail.com<mailto:cab7wygv4+ji-tj5jkvg98kw0hxot8zlnuk+nzvjywfdijio...@mail.gmail.com>> Content-Type: text/plain; charset=UTF-8 Hello Danny, I think so. Any special concern with a VM using more than one port on a subnet? andrea On 2 December 2014 at 02:04, Danny Choi (dannchoi) <dannc...@cisco.com<mailto:dannc...@cisco.com>> wrote: Hi, When I attach 2 interfaces from the same subnet to a VM, there is no error returned and both interfaces come up. lab@tme211:/opt/stack/logs$ nova interface-attach --net-id e38dba4a-74ed-4312-ba21-2a04b5c5a5b5 cirros-1 lab@tme211:/opt/stack/logs$ nova list +--------------------------------------+----------+--------+------------+-------------+-------------------+ | ID | Name | Status | Task State | Power State | Networks | +--------------------------------------+----------+--------+------------+-------------+-------------------+ | 9d88d0b5-2453-4657-8058-987980ec7744 | cirros-1 | ACTIVE | - | Running | private=10.0.0.10 | +--------------------------------------+----------+--------+------------+-------------+-------------------+ lab@tme211:/opt/stack/logs$ nova interface-attach --net-id e38dba4a-74ed-4312-ba21-2a04b5c5a5b5 cirros-1 lab@tme211:/opt/stack/logs$ nova list +--------------------------------------+----------+--------+------------+-------------+------------------------------+ | ID | Name | Status | Task State | Power State | Networks | +--------------------------------------+----------+--------+------------+-------------+------------------------------+ | 9d88d0b5-2453-4657-8058-987980ec7744 | cirros-1 | ACTIVE | - | Running | private=10.0.0.10, 10.0.0.11 | +--------------------------------------+----------+--------+------------+-------------+------------------------------+ $ ifconfig eth0 Link encap:Ethernet HWaddr FA:16:3E:92:2D:2B inet addr:10.0.0.10 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::f816:3eff:fe92:2d2b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:514 errors:0 dropped:0 overruns:0 frame:0 TX packets:307 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:48342 (47.2 KiB) TX bytes:41750 (40.7 KiB) eth1 Link encap:Ethernet HWaddr FA:16:3E:EF:55:BC inet addr:10.0.0.11 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::f816:3eff:feef:55bc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:49 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3556 (3.4 KiB) TX bytes:1120 (1.0 KiB) Should this operation be allowed? Thanks, Danny _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org<mailto:OpenStack-dev@lists.openstack.org> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
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