On 06/21/2011 03:16 PM, Bill Nottingham wrote: > Don Dutile (ddutile@xxxxxxxxxx) said: >>> Essentially, hot-adding a virtual device would not bring the device >>> up automatically if you're using the old network service; you'd have >>> to run 'ifup' by hand. >>> >> hot-adding a VF-nic to a Linux kvm guest brings up the hot-added (VF) >> nic in the guest today.... am I missing what you mean? > > It depends on the network system in use - if NetworkManager is running, > the guest will bring it up. If the old /etc/init.d/network service is > running, it will only bring it up if there's an ifcfg file for that > device (which is usually tied to the hardware address, but is sometimes > just tied to the device name.) > >>>>> For #4, bringing up the device automatically can cause more issues >>>>> than it solves. (We've seen this happen for vlans, for example.) >>>> This is done all the time (on KVM hosts) to take down PF driver& load >>>> PF+VF drivers for SRIOV-capable devices. >>> >>> This would be a different device with a different hardware address, >>> correct? >>> >> Nope; typically start up an SRIOV device in PF-only mode (igb, for >> example), then do an rmmod igb; modprobe igb max_vfs=7; same PF mac; >> new VF mac's. >> >> and as VF's are added& removed from guests, they may be removed& added >> back to host. > > The MAC addresses in the VF are still pseudo-random, correct? > depends on device vendor; some are based on PF value/prefix... > Bill -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
