Default Route Change Without Reboot: Solaris

View the routing table:

# netstat -rn
----------------------
  Routing Table: IPv4
  Destination           Gateway           Flags  Ref   Use   Interface
-------------------- -------------------- ----- ----- ------ ---------
10.67.13.0           10.67.13.50           U        1     42  hme0
10.67.3.0            10.67.3.65            U        1   9172  hme1
224.0.0.0            10.67.13.50           U        1      0  hme0
default              10.67.12.1            UG       1    148
127.0.0.1            127.0.0.1             UH       2    783  lo0
----------------------

Delete current default router:

# route delete default 10.67.12.1

Add new default router:

# route add default 10.67.13.1 1

if you're ssh'd in from afar, then combine the route delete and route add into one command.

# route delete default 10.67.12.1 ; route add default 10.67.13.1

as separate commands you loose connectivity after the delete, so you can't enter the route add.

also to make the default route come up on the next reboot, change the address in:
/etc/defaultrouter