Hi. This page saved me a lot of trouble today, when my Xen 3 multi-bridge setup stopped working after updated from CentOS 5.5 to 5.7: http://www.centos.org/docs/5/html/Virtualization-en-US/ch-virt-bridge-errors.html However there were a couple of errors in the script: use of "op" instead of "OP" (variable name mismatch) and use of .. ,, instead of ;; in the shell "case" structure. I can't tell if these errors are from redhat.com or from CentOS, and I couldn't find the Red Hat source. So I'm posting here just to do something in the general direction of improving this resource. Thank you! Love CentOS. Yours fondly, Aleksey