intentional reboot of servers, using OVM Mgr;
check with 'ip addr' i find eth0 configured as MULTICASTSLAVE with correct MAC, but bridge id 0aaca000 showing NO CARRIER, MAC 00:00:00:00:00:00
have experienced the issues of directly changing underlying Linux configuration, but don't see how to correct this using OVM Mgr.
this was a simple use of the Oracle RAC template 11.0.1 r1 (and 12c) .
reboot was intentional to watch application stack restart after migration.
don't know how eth0/bond0/0aaca000 become undefined/no carrier; unsure how to recover/correct