On Wed, May 9, 2018 at 5:36 PM, Gianluca Cecchi <[email protected]> wrote: > > > On Wed, May 9, 2018 at 4:32 PM, Simone Tiraboschi <[email protected]> > wrote: >> >> >> >> On Wed, May 9, 2018 at 4:21 PM, Gianluca Cecchi >> <[email protected]> wrote: >>> >>> Hello, >>> suppose I have an environment with self hosted engine environment in 4.1 >>> >>> How is it generated the hw address of the virtual nic of the engine vm >>> when I deploy using cockpit? >>> >>> Suppose on a lan I already have a self hosted engine environment and I'm >>> going to create another one on the same lan, is there any risck of hw >>> address collision for the engine? >>> >>> I know that from inside web admin console I can then set the hw address >>> ranges for the VMs, but what about the mac of the engine vm itself? >>> >>> At the moment I have only lan access and so crosschecked an RHV 4.1 >>> environment and I see that the engine has hw addr 00:16:3e:7c:65:34 (a >>> lookup seems to associate to "Xensource, Inc.") while the VMs have their hw >>> addr in the range 00:1a:4a:16:01:51 - 00:1a:4a:16:01:e6 (eg the >>> 00:1a:4a:16:01:56) (a lookup seems to associate to "Qumranet Inc.". >>> >>> Does this mean that the engine has a sort of dedicated range? Any risk of >>> collision or is a query on the lan done before assigning it? >> >> >> It has been discussed here: >> https://bugzilla.redhat.com/show_bug.cgi?id=1244502 >> >> In a few worlds: the proposed HE MAC address are explicitly on a different >> range just to minimize collision risks on complex scenarios. >> > > > Thanks Sandro, > Indeed I forgot that as part of the engine deploy (from cockpit but it > should be the same from the deprecated command line setup too) there is the > explicit option to specify hw address of its vnic. > In my case I'm proposed this one: > " > You may specify a unicast MAC address for the VM or accept a randomly > generated default [00:16:3e:15:6a:e5]: > " > So I should be in the safe place, as I have only one other engine vm and I > have no Xen based environments...
I also filed around the same time: https://bugzilla.redhat.com/show_bug.cgi?id=1516445 Feel free to comment/vote/etc... Best regards, -- Didi _______________________________________________ Users mailing list -- [email protected] To unsubscribe send an email to [email protected]
