dear lists, 2 RAC nodes 10.2.0.4.4 on linux rhel5.4 itanium interconnect I configure: - bonding lacp mode - mtu 9000 - 2 switches, trunk configuration for failover got this error..... even very rare, just curious is it critical or just information? System name: Linux Release: 2.6.18-164.el5 Version: #1 SMP Tue Aug 18 15:54:55 EDT 2009 Machine: ia64 Unix process pid: 27846, image: oracle@hostname *** 2010-05-30 01:04:20.293 *** ACTION NAME:(RAC_HOSTS) 2010-05-30 01:04:20.293 *** MODULE NAME:(Realtime Connection) 2010-05-30 01:04:20.293 *** SERVICE NAME:(SYS$USERS) 2010-05-30 01:04:20.293 *** CLIENT ID:() 2010-05-30 01:04:20.293 *** SESSION ID:(1035.389) 2010-05-30 01:04:20.293 SKGXPSEGRCV: MESSAGE TRUNCATED user data 48 bytes payload 224 bytes SKGXPSEGRCV: trucated message buffer data skgxpmsg meta data header 0x0x60000fffffe52f10 len 48 bytes SKGXPLOSTACK: message truncation expected SKGXPLOSTACK: data sent to port with no buffers queued from SKGXPGPID 0x60000fffffe53060 Internet address 11.11.11.3 UDP port number 54199 SKGXPLOSTACK: sent seq 32763 expecting 32764 SKGXPLOSTACK: lost ack detected retransmit ack *** 2010-05-30 01:15:35.446 -- thanks and regards ujang jaenudin jakarta - indonesia