安装rac和故障处理，经常需要分析心跳网络是否正常，oracle提供了专门的测试包mcasttest.tgz
下载地址，MOS文档中
Grid Infrastructure Startup During Patching, Install or Upgrade May Fail Due to Multicasting Requirement (Doc ID 1212703.1)
Multicast check WARNING during Installation of RAC Database Installation (Doc ID 2321623.1)
下载后上传到/opt目录下，具体操作如下
[root@db1 opt]# gunzip mcasttest.tgz
[root@db1 opt]# tar -xvf mcasttest.tar
mcasttest/
mcasttest/README.txt
mcasttest/mcast2.aix.ppc64
mcasttest/mcast2.linux.x32
mcasttest/mcast2.hpux.ia64
mcasttest/mcasttest.pl
mcasttest/mcast2.solaris.sparc64
mcasttest/mcast2.solaris.x64
mcasttest/mcast2.linux.s390x
mcasttest/mcast2.linux.x64
mcasttest/mcast2.hpux.parisc64
[root@db1 opt]# chmod -R 775 mcasttest
[root@db1 opt]# su - grid
+ASM1:/home/grid@db1>cd /opt/mcasttest/
+ASM1:/opt/mcasttest@db1> ./mcasttest.pl -n db1,db2 -i ens19f0,bond0
########### Setup for node db1 ##########
Checking node access 'db1'
Checking node login 'db1'
Checking/Creating Directory /tmp/mcasttest for binary on node 'db1'
Distributing mcast2 binary to node 'db1'
########### Setup for node db2 ##########
Checking node access 'db2'
Checking node login 'db2'
Checking/Creating Directory /tmp/mcasttest for binary on node 'db2'
Distributing mcast2 binary to node 'db2'
########### testing Multicast on all nodes ##########
Test for Multicast address 230.0.1.0
Aug 8 16:25:46 | Multicast Succeeded for ens19f0 using address 230.0.1.0:42000
Aug 8 16:25:47 | Multicast Succeeded for bond0 using address 230.0.1.0:42001
Test for Multicast address 224.0.0.251
Aug 8 16:25:48 | Multicast Succeeded for ens19f0 using address 224.0.0.251:42002
Aug 8 16:25:49 | Multicast Succeeded for bond0 using address 224.0.0.251:42003
+ASM1:/opt/mcasttest@db1>