IP address configured for
the private network interface must be a non-routable interface.
A non-routable IP address is
visible only in a local network, and the packets destined to those non-routable
addresses are guaranteed to be within a switch/router; hence, packets to those
destinations will not be routed to the Internet.
If you could remember when ever we created RAC setup using VM or Virtual Box on our local desktops we were using these private IP's address space for both public and private networks to ensure that communication happens with in the network and thus router stops packets going outside of the network with the below given IP range . If a router sees a packet with private IP as its destination IP address then packet is not routed to the internet .
If you could remember when ever we created RAC setup using VM or Virtual Box on our local desktops we were using these private IP's address space for both public and private networks to ensure that communication happens with in the network and thus router stops packets going outside of the network with the below given IP range . If a router sees a packet with private IP as its destination IP address then packet is not routed to the internet .
Private IP / Non-Routable Addresses
Class
|
Starting IP Address
|
Ending IP Address
|
# of Hosts
|
A
|
10.0.0.0
|
10.255.255.255
|
16,777,216
|
B
|
172.16.0.0
|
172.31.255.255
|
1,048,576
|
C
|
192.168.0.0
|
192.168.255.255
|
65,536
|
It is possible to use any IP address for private
network , However it is a bad practice to use routable IP address as Private IP’s
. If we use routable IP addresses as private IP’s there is a possibility that
packets can be intermittently routed to the Internet instead of another node in
the cluster. This incorrect routing can cause intermittent cluster heartbeat failure leading to node evictions . Therefore, we should configure only non-routable IP addresses for private
networks.
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