node 1, db1, has a disk HB, but no network HB, DHB has rcfg / Node db1, number 1, is in an existing

 Hi Folks.

I'm facing an issue to startup Grid Infrastructure 11gR2 11.2.0.2 on Linux RH 5.5 after a server reboot. Is the multicast a "must to have" function/feature to GridInfrastructure works?

I checked the connectivity between the nodes via priv interfaces and its working fine.

2012-08-30 20:26:19.688: [    CSSD][1077295424]clssscExit: CSSD aborting from thread GMClientListener

2012-08-30 20:26:19.688: [    CSSD][1077295424]###################################

2012-08-30 20:26:19.688: [    CSSD][1077295424](:CSSSC00012:)clssscExit: A fatal error occurred and the CSS daemon is terminating abnormally

2012-08-30 20:26:19.688: [    CSSD][1077295424]clssgmUpdateEventValue: CmInfo State  val 0, changes 1

2012-08-30 20:26:19.830: [    CSSD][1112914240]clssgmWaitOnEventValue: after CmInfo State  val 3, eval 0 waited 860

2012-08-30 20:26:19.830: [    CSSD][1112914240]clssgmPeerListener: terminating at incarn(0)

2012-08-30 20:26:19.930: [    CSSD][1109760320]clssnmvDHBValidateNCopy: node 1, db1, has a disk HB, but no network HB, DHB has rcfg 237517485, wrtcnt, 12493695, LATS 4141594, lastSeqNo 12493692, uniqueness 1344530807, timestamp 1346369179/1838595614