On Mon, Feb 26, 2007 at 03:13:04PM +0100, Bertho Stultiens wrote: > Pasi Kärkkäinen wrote: > [snip] > > 1. Changes the MAC-address of peth0 to FE:FF:FF:FF:FF:FF. If I have another > > physical interface, peth1, can it have the same MAC address, or does it have > > to be different? > > In principle, all unicast MACs in a broadcast domain have to be unique. > Each vlan is a broadcast domain, so that is fine. However, the kernel > has a slightly different view of the interfaces and I an not sure that > it can keep everything properly isolated. The FE:FF..FF addresses are > fake anyway and should be local only. There is then the STP problems you > can run into depending on whether you have all isolated STP instances > for each vlan/interface. > > To make a long story short :), use unique MACs to avoid problems. You > can use them f.ex. from the 00:01:01, 10:00:00, ac:de:48... (and there > are more private MAC pools defined; see > http://standards.ieee.org/regauth/oui/oui.txt and look for PRIVATE). > > [do not use MAC addresses with an odd numbered high octet; these are > reserved for multicast/broadcast] > OK. Thanks. Because peth* and xenbr* have NOARP, it should be ok to use fake MAC-addresses.. for example: peth0 FE:FF:FF:FF:FF:00 peth1 FE:FF:FF:FF:FF:01 etc. Or should I use some of the PRIVATE address ranges from that doc? > > > 2. Sets peth0 to NOARP (disables ARP). Why is this? Is it a requirement? > > 3. Sets xenbr0 to NOARP. Same question goes for this. > > The NOARP is because you do not want the interfaces to answer to arp > requests. Neither interface has an IP address assigned, so they are to > be local only and their MAC should not propagate. It is a requirement so > far as to have them shut up... > OK. > > > I have working setup with FC6 network scripts/tools, but I'd like to make > > sure I do the correct things. > > If you also could post your resulting scripts or make a micro-howto, > that would be great too. Polishing can be done on the list I guess. > I'll do it after I've tested them properly :) -- Pasi -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
