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Chapter 2
Routing Principles
Gateway of last resort is not set is subnetted, 6 subnets
C is directly connected, BRI0/0
C is directly connected, Ethernet0/0
S [1/0] via, Ethernet0/0
S [1/0] via, Ethernet0/0
R [120/3] via,
R [120/2] via,
At the top of the routing table are the different codes that describe the
entries found in a routing table. In the example above, the entries include
both directly connected static routes and RIP entries.
Let's take a look at a static route entry:
S [1/0] via, Ethernet0/0
The list below describe the different parts of the routing table entry:
S The means by which the entry was learned on this router. S is for static
entry, which means that the administrator added the route manually. The logical destination remote network or subnet.
[1 The administrative distance, or trustworthiness, of a route. (We dis-
cuss this in the next section.)
/0] The metric value. Since it is a static route, the value is 0 because the
router is not learning the route; thus the router has nothing to compare
the route with. This value will vary widely depending on the routing pro-
tocol used.
via The address of the next relay device to forward pack-
ets to.
Ethernet0 The interface from which the path was learned and to which
the packets will be forwarded.
Copyright ©2001 SYBEX , Inc., Alameda, CA