In 4.2, we do support a feature called "Multiple Ips per guest NIC". May be this is another simple way to achieve some of the things (mentioned some of the use cases below) that we want to with multiple NICs in same physical network.
* Host multiple SSL websites on a single instance. You can install multiple SSL certificates on a single instance, each associated with a distinct IP address. * Build network appliances. Network appliances such as firewalls and load balancers generally work best when they have access to multiple IP addresses on a network interface. * Move private IP addresses between interfaces or instances. Applications that are bound to specific IP addresses can be moved between instances On 19/08/13 6:20 PM, "Shanker Balan" <shanker.ba...@shapeblue.com> wrote: >On 13-Aug-2013, at 6:14 PM, Venkata SwamyBabu Budumuru ><venkataswamybabu.budum...@citrix.com<mailto:venkataswamybabu.budumuru@cit >rix.com>> wrote: > >As far as I know, it is not possible to add multiple NICs in the same >network. Not really sure of the technical reason. > >Caveat: Its been ages since I tested such a configuration on Linux so >YMMV. > >I have seen weird routing issues happen on the host side if you have 2 >NICs having IP addresses on the same network segment if you dont have >proper static routes. This is with physical Linux hosts. It is generally >considered a bad idea to run production systems with such a configuration. > >Perhaps the same rules apply to VMs also and hence the artifical limit in >assigning mutliple NICs on the same network. > >Regards. >@shankerbalan > > > >From: Gaspare A Silvestri ><g.silves...@netsons.com<mailto:g.silves...@netsons.com>> >Reply-To: >"users@cloudstack.apache.org<mailto:users@cloudstack.apache.org>" ><users@cloudstack.apache.org<mailto:users@cloudstack.apache.org>> >Date: Tuesday, 13 August 2013 6:00 PM >To: "users@cloudstack.apache.org<mailto:users@cloudstack.apache.org>" ><users@cloudstack.apache.org<mailto:users@cloudstack.apache.org>> >Subject: Re: CS 4.1.1 -- Multiple NICs for instance > >Thank you. > >Is it possible adding multiple NICs to the same network (ID)? > >thanks, > >Gaspare > >On 13/08/2013 14:27, Venkata SwamyBabu Budumuru wrote: > >deployVirtualMachine takes list of network ids as parameter. You can make >use of it. > >If you want to attach additional network after the vm is deployed then >there is another API I.e. "addNicToVirtualMachine" ><http://cloudstack.apache.org/docs/api/apidocs-4.1/user/addNicToVirtualMac >h >ine.html><http://cloudstack.apache.org/docs/api/apidocs-4.1/user/addNicToV >irtualMachine.html> > >Thanks, >SWAMY >On 13/08/13 5:46 PM, "Gaspare A Silvestri" ><g.silves...@netsons.com><mailto:g.silves...@netsons.com> wrote: > > > >Hello everybody, > >is it possible assigning more than one NIC to a VM instance? If so, >which way can I perform this task? > >Thanks inadvance, > >Gaspare > > > >-- > > > > >Supernova s.r.l. >Via G. Misiticoni, 3 >65126 - Pescara >ITALY > >www.netsons.com<http://www.netsons.com/> >Gaspare A. Silvestri >Technical Director - Head of IT >VMWare VCP 4 - VMWare VCP 5 - Microsoft MCTS >Oracle OCA 11g - Oracle SUN OCP - Symantec SCS > >t. (+39) 085 45 100 52 >m. 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Any views or >opinions presented are solely those of the author and do not necessarily >represent those of the company. > >-- >@shankerbalan > >M: +91 98860 60539 | O: +91 (80) 67935867 >shanker.ba...@shapeblue.com<mailto:shanker.ba...@shapeblue.com> | >www.shapeblue.com<http://www.shapeblue.com> | Twitter:@shapeblue >ShapeBlue Services India LLP, 22nd floor, Unit 2201A, World Trade Centre, >Bangalore - 560 055 > >This email and any attachments to it may be confidential and are intended >solely for the use of the individual to whom it is addressed. Any views >or opinions expressed are solely those of the author and do not >necessarily represent those of Shape Blue Ltd or related companies. If >you are not the intended recipient of this email, you must neither take >any action based upon its contents, nor copy or show it to anyone. Please >contact the sender if you believe you have received this email in error. >Shape Blue Ltd is a company incorporated in England & Wales. 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