on Sun M4000 server, you may see following exception or output of ifconfig -a command.
Getting exception : “Couldn’t set ppa for unit 0: File exists” or sppd0 interface exists in output of ifconfig -a
To get over that issue, you have to disable DSCP service. To do that,
1. Login as a root
2. Then, disable dscp service by following command.
bash-3.00# svcadm disable svc:/platform/sun4u/dscp:default
3. If you want to be sure of service name, then you can find by following command
# svcs -a | grep dscp
maintenance 1:23:45 svc:/platform/sun4u/dscp:default