6-1
8000-A2-GB21-30
April 1998
IP Routing
6
Overview
This chapter presents information regarding the theory behind the configuration
of routes (static and dynamic) on the Hotwire DSLAM, as well as examples. Both
standard destination-based routes and source-based routes are described.
Routing Table
The
routing table stores information about possible destinations for packets that
are routed through the Hotwire DSLAM. It also identifies the next hop address to
which to send the packet. The MCC, DSL cards, and RTUs maintain their own
routing tables. There are two types of routes: static and dynamic. A static route
is a permanent entry into the routing table that is manually entered. A dynamic
route is an automatic (assigned) entry into the routing table; it does not need to
be manually entered. Static routes can be destination based or source based.
However, dynamic routes can be only destination based.
Although the Hotwire DSLAM routing table supports both destination-based
routing and source-based routing, this section discusses destination-based
routing only. (Source-based routing is discussed later in this chapter.)
The routing table is comprised of:
H Configured routes (static and/or dynamic)
H Routes learned by implication of directly connected hosts/networks
H Routes learned by the MCC card from the DSL about its directly connected
hosts (RTUs)
