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Re: [MirageOS-devel] Xen VIF configuration for tap devices


to take a slightly different tack on this -- is there anyone out there 
successfully running mirage unikernels on xen that make use of >1 network 
interface?  how did you configure this?  

haris-- what did you do for the mirage openflow paper?

more generally-- is http://wiki.xenproject.org/wiki/Xen_Networking the 
canonical location for info on how to configure and manage networking on xen 

and presumably all this results in entries in xenstore-- are 
http://wiki.xen.org/wiki/XenStore and 
http://wiki.xen.org/wiki/XenStore_Reference the canonical documentation for 
xenstore and it's use by network devices?

is there any documentation available on how to debug openvswitch networking on 
xen via xenstore (or through some other means)?

On 26 Oct 2014, at 20:06, Masoud Koleini <Masoud.Koleini@xxxxxxxxxxxxxxxx> 

> I have defined 3 vifs with 3 different mac addresses for the 3 tap 
> devices that I am using, and switch shows the same mac address (mac 
> address of the first defined vif) assigned to both tap2 and tap3.
> Another issue that I faced is, although I can ping switch vm, nothing 
> appears on vifs and xenbr0 when switch starts a TCP connection to a 
> remote controller (using TCPV4 create_connection function). This 
> function works well for unix config.
> On 26/10/14 11:43, Anil Madhavapeddy wrote:
>> On 25 Oct 2014, at 11:36, Masoud Koleini <masoud.koleini@xxxxxxxxxxxxxxxx> 
>> wrote:
>>> Hi all,
>>> I have a switch with three tap devices tap0 (for the controller 
>>> connection), tap1, and tap 2 running on Xen.
>>> What would be the right VIF configuration for Xen?
>> It would be pretty much the same configuration as your tap setup.  The Xen 
>> networking model is to expose a VIF ('virtual interface') in the guest and 
>> dom0.  Everything else from there is host setup and can be customised -- 
>> most commonly by adding a bridge to the outside world and adding the VIFs 
>> from the guests to that bridge so they can communication externally.
>> The xl setup fragment looks like:
>>     vif = [ 'bridge=xenbr0' ]
>> or
>>     vif = [ 'mac=c0:ff:ee:c0:ff:ee,bridge=br0' ]
>> -anil
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