This is int4eresting stuff. I do note that the "virt-manager" tool, and NetworkManager, give *no* insight and detailed management sufficient to resolve this stuff. Note also that dancing through all the hoops to get this working, end-to-end, is one of the big reasons that most environments refuse to even *try* to use jumbo frames, as helpful as they sometimes are to heavy data transfers. On Thu, Nov 21, 2013 at 6:58 PM, Digimer <lists@xxxxxxxxxx> wrote: > On 21/11/13 18:20, aurfalien wrote: >> >> On Nov 21, 2013, at 2:45 PM, Digimer wrote: >> >>> The 'vnetX' number doesn't relate to the interface, bridge or anything >>> else. The vnetX number is a simple sequence that increments each time a >>> VM is started. So don't think that you need 'vnet6'... it can be anything. >>> >>> The 'brctl show' output from earlier showed that both vnet0 and vnet1 >>> were connected to br0. You can try using the bridge utils to remove them >>> from br0 and connect them to br6 as a test. >>> >>> -- >>> Digimer >> >> Well, when I remove vnet1 from br0 and add vnet1 to br1, I loose connectivity with my VMs. >> >> No biggy so I reboot my entire host. >> >> Then vnet1 show back under br0. >> >> I just don't understand enough about this to get a clue, depressing. >> >> - aurf > > Think of each bridge as if it were a physical switch. > > When you detached vnet1 from br0, you unplugged it from a switch. When > you attached it to br1, you plugged it into another switch. > > If there is no connection out to your network/internet on a given > switch, then anything plugged into that switch will go nowhere. Same > with bridges. > > You seemed to indicate earlier that the main connection was on br6. Is > this true? If so, then "switch" br6 is the switch with the "uplink" to > your network. Plug a VM into it and you can route out through it. > > When you rebooted the VM, the hypervisor read the definition file. That > definition file says to plug in the server to br0. So it makes sense > that the reboot reconnected it to br0. > > If you want to use jumbo frames on the br0 switch, you need to set the > larger MTU on the interfaces are all set to your desired MTU size. > > -- > Digimer > Papers and Projects: https://alteeve.ca/w/ > What if the cure for cancer is trapped in the mind of a person without > access to education? > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
