If the RAC nodes are also Sun Cluster nodes,
clprivnet0 interface can be used for RAC interconnects as well with inbuilt redundancy.
Eg:-
clprivnet0: flags=1009843
ether 0:0:0:0:0:1
# cat /etc/hosts
# Internet host table
#
::1 localhost
127.0.0.1 localhost
192.168.2.125 node1 node1.domain.lk loghost
192.168.2.126 node2 node2.domain.lk
# Oracle RAC Public
192.168.2.129 ora-vip-1
192.168.2.130 ora-vip-2
# Oracle RAC Interconnects
172.16.4.1 ora-prip-1
172.16.4.2 ora-prip-2
Else we have to use Solaris level network redundancy.
Simple rules for switches between interconnects
- Interconnect switches should be in a single fabric
- Dedicated VLAN for interconnects links
- Port fast should be enabled for all interconnect ports
Eg: -
Switch -A> (enable) set spantree portfast 2/1 enable
Configuration options for Solaris 10
- Option 1 : Link based IPMP
# cat /etc/hostname.e1000g0
ora-prip-1 group sc_ipmp0 up
# cat /etc/hostname.e1000g4
group sc_ipmp0 standby up
- Option 2 : Link aggregation (All links (below: - e1000g0 and e1000g4) of an aggregation should connect to a single switch)
# dladm show-dev
# dladm create-aggr -d e1000g0 -d e1000g4 1
# dladm show-aggr 1
Port Grouping and LCAP should be enabled in the switch
Eg:-
Switch Config:
# = Insert Integer
Configure a Port Group:
interface Port-channel#
switchport access vlan #
switchport mode access
exit
port-channel load-balance src-dst-ip
Please configure the ports you want in the channel (4 max) required as following:
# = Insert Integer
config term
interface INTERFACE
channel-group # mode passive
channel-protocol lacp
switchport access vlan #
switchport mode access
exit
end
show run (to verify)
