On Monday 22 August 2005 18:09, Markus Hochholdinger wrote: > Hi, > > Am Montag, 22. August 2005 17:24 schrieb Blaisorblade: > > If your distro, instead of doing: > > ifconfig eth0 up > > ifconfig eth0 <address>, does > > ifconfig eth0 <address>, then UML will decide the Mac address based on > > the IP address (will be FE:FD:<ip address in hex, maybe reversed>).
> yeah, but i forget to tell that i use kernel level configuration with > ./linux ip=.. > so i don't "need" (so i thougth1?) to make any ifconfig inside the uml. That's VERY interesting. But UML's trick to variate the MAC was never tested in that case. Is that the one enabled by CONFIG_IP_PNP (i.e. "IP: kernel level autoconfiguration")? It seems yes, and that code seem to have the same problem (it first brings up the interface, and later assigns it the IP). Uml obviously can't change the MAC while the interface is up (I guess that would for sure break DHCP, for instance), so the only way to make it re-choose its MAC is to shut the interface down and bring it up again with the IP. > The benefit is, i can copy one uml-fs for testing, start the backup uml > with a different ip on the backup-root-fs without changing the > backup-root-fs or startup-scripts inside the uml. I pass the IP on the command line as an env var and manually parse it inside the distro's boot scripts. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
