Static Routing

• Upon booting, default routes initialized from files. Eg: /etc/rc.net in AIX, /etc/netstart in BSD, /etc/rc.local in SUN/Solaris

• Use ‘route’ command to add new routes eg: route add default sun 1

• ICMP redirect: sent to host by router when a “better” router exists on the same subnet.

• Alt: router discovery ICMP messages

  • Router solicitation request from host
  • Router advertisement messages from routers

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