Verify cluster Interconnect Check for active Nodes [root@grac41 ~]# olsnodes -n -i -s -t grac41 1 192.168.1.218 Active Unpinned grac42 2 192.168.1.199 Active Unpinned Locate cluster interconnect device [root@grac41 Desktop]# oifcfg getif eth1 192.168.1.0 global public eth3 192.168.3.64 global cluster_interconnect --> eth3 is out CI device Verify status of our Network devices On Node grac41 [root@grac41 Desktop]# ifconfig eth3 eth3 Link encap:Ethernet HWaddr 08:00:27:92:43:5B inet addr:192.168.3.101 Bcast:192.168.3.127 Mask:255.255.255.192 inet6 addr: fe80::a00:27ff:fe92:435b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 On Node grac42 [root@grac41 Desktop]# ssh grac42 ifconfig eth3 eth3 Link encap:Ethernet HWaddr 08:00:27:AB:00:74 inet addr:192.168.3.102 Bcast:192.168.3.127 Mask:255.255.255.192 inet6 addr: fe80::a00:27ff:feab:74/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 --> Verify that interface has same name ( eth3 ) , MTU size, Bcast, Net Mask and status is UP BROADCAST RUNNING MULTICAST Run ping command from both hosts: Ping the node grac42 from grac41 [oracle@grac41 ~]$ ping -s 1500 -c 5 -I 192.168.3.101 192.168.3.102 PING 192.168.3.102 (192.168.3.102) from 192.168.3.101 : 1500(1528) bytes of data. 1508 bytes from 192.168.3.102: icmp_seq=1 ttl=64 time=0.103 ms 1508 bytes from 192.168.3.102: icmp_seq=2 ttl=64 time=0.475 ms 1508 bytes from 192.168.3.102: icmp_seq=3 ttl=64 time=0.421 ms 1508 bytes from 192.168.3.102: icmp_seq=4 ttl=64 time=0.416 ms 1508 bytes from 192.168.3.102: icmp_seq=5 ttl=64 time=0.305 ms --- 192.168.3.102 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4000ms rtt min/avg/max/mdev = 0.103/0.344/0.475/0.132 ms and vice versa [oracle@grac42 ~]$ ping -s 1500 -c 5 -I 192.168.3.102 192.168.3.101 PING 192.168.3.101 (192.168.3.101) from 192.168.3.102 : 1500(1528) bytes of data. 1508 bytes from 192.168.3.101: icmp_seq=1 ttl=64 time=0.275 ms 1508 bytes from 192.168.3.101: icmp_seq=2 ttl=64 time=0.161 ms 1508 bytes from 192.168.3.101: icmp_seq=3 ttl=64 time=0.358 ms 1508 bytes from 192.168.3.101: icmp_seq=4 ttl=64 time=0.459 ms 1508 bytes from 192.168.3.101: icmp_seq=5 ttl=64 time=0.317 ms --- 192.168.3.101 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4001ms rtt min/avg/max/mdev = 0.161/0.314/0.459/0.097 ms