Routing

Solaris: routing can be checked by command:

netstat -nr

For example on clondaq2 it shows following:

Routing Table: IPv4
  Destination           Gateway           Flags  Ref   Use   Interface
-------------------- -------------------- ----- ----- ------ ---------
129.57.68.0          129.57.68.24         U         1      6  e1000g1
129.57.69.0          129.57.69.202        U         1      3  e1000g2
129.57.167.0         129.57.167.109       U         1    546  e1000g0
129.57.16.0          129.57.68.100        UG        1      4  
224.0.0.0            129.57.167.109       U         1      0  e1000g0
default              129.57.167.99        UG        1    356  
127.0.0.1            127.0.0.1            UH        5    180  lo0

In that example traffic was routed to subnet 16 to serve SILO. It was achieved by script /etc/rc3.d/S99manualroute with following contents:

#!/sbin/sh
#
# This script adds a manual route to force traffic to the 16 net
# out the NIC that is on the 129.57.68.x lan. 
#   - P. Letta 04/06/2006
case "$1" in
start)
        /usr/sbin/route add -net 129.57.16.0 -netmask 255.255.252.0 129.57.68.100
        ;;
stop)
        ;;
*)
        echo "Usage: $0 { start }"
        exit 1
        ;;
esac
exit 0

Linux: