Why the VIP subnet mask is not the same as that of the public NIC

hwqhx

PUBLIC NIC.
oracle@:/oracle$ /usr/sbin/ifconfig lan900
lan900: flags=1843<UP,BROADCAST,RUNNING,MULTICAST,CKO>
        inet 10.32.115.31 netmask ffffff80 broadcast 10.32.115.127

        PUBLIC NIC’S VIP info .

oracle@1:/oracle$ /usr/sbin/ifconfig lan900:801
lan900:801: flags=8000000000001843<UP,BROADCAST,RUNNING,MULTICAST,CKO,PORT>
        inet 10.32.115.33 netmask ffffff00 broadcast 10.32.115.255

Information from oifcfg.

oracle@:/oracle$ oifcfg getif
lan901  172.32.115.0  global  cluster_interconnect
lan900  10.32.115.0  global  public

武汉-SSH

今天正好测试了一个 Mask:255.255.255.192 的，
11.2.0.3
# ifconfig|grep addr
eth2      Link encap:Ethernet  HWaddr 10:1F:74:32:D9:70
          inet addr:10.36.6.20  Bcast:10.36.6.63  Mask:255.255.255.192
eth2:1    Link encap:Ethernet  HWaddr 10:1F:74:32:D9:70
          inet addr:10.36.6.22  Bcast:10.36.6.63  Mask:255.255.255.192
eth2:2    Link encap:Ethernet  HWaddr 10:1F:74:32:D9:70
          inet addr:10.36.6.23  Bcast:10.36.6.63  Mask:255.255.255.192
eth3      Link encap:Ethernet  HWaddr 10:1F:74:32:D9:74
          inet addr:192.168.100.200  Bcast:192.168.100.255  Mask:255.255.255.0
eth3:1    Link encap:Ethernet  HWaddr 10:1F:74:32:D9:74
          inet addr:169.254.4.141  Bcast:169.254.255.255  Mask:255.255.0.0
          inet addr:127.0.0.1  Mask:255.0.0.0

武汉-SSH

这个还真没注意，部署过几个NETMASK 不是 24的，但是起来后的VIP，还真没注意NETMASK是否不同。

Maclean Liu(刘相兵

Know more about ORACLE RAC VIP!!!!

Oracle RAC 10g VIPThe Details!


One for each node in cluster
Required for Oracle Clusterware installation
IP and network name should not currently be in use
Should be registered in DNS and be on the same subnet as public IP address
Can use OS bonding to provide failover and load balancing on network interfaces on the node
Configuration managed by VIPCA


Note that netmask defaults to 255.255.255.0, rather than defaulting to netmask of underlying physical interface.

If not in DNS, then it should be at least in the /etc/hosts file for all nodes in cluster and any client node accessing the cluster.
Note the installer will not accept a VIP in the following
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
However VIPCA will let you configure them post install (just let VIPCA part of the install fail)

武汉-SSH

这个应该是配置的时候没有严格去写掩码导致。

hwqhx

发错了，重新开

[ 本帖最后由 hwqhx 于 2011-12-31 07:48 编辑 ]