Configuring IP

Table 6.1: IP Global Parameters – routing switches (Continued)

Parameter

Description

Default

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Origination of

You can enable a router to originate default routes for

Disabled

7-10

default routes

the following route exchange protocols, on an

 

8-32

 

individual protocol basis:

 

 

 

 

 

•

RIP

 

10-29

 

 

 

 

•

OSPF

 

 

 

•

BGP4

 

 

 

 

 

 

Default route

Optimizes forwarding cache space by aggregating

Separate cache entry

6-61

aggregation

cache entries for destinations to which the router

for each destination

 

 

forwards traffic using a default route. When you

host

 

 

enable default route aggregation, the router makes a

 

 

 

single cache entry for a destination network instead of

 

 

 

multiple entries for the hosts on the network.

 

 

 

 

 

 

Default network

The router uses the default network route if the IP

None configured

6-46

route

route table does not contain a route to the destination

 

 

 

and also does not contain an explicit default route

 

 

 

(0.0.0.0 0.0.0.0 or 0.0.0.0/0).

 

 

 

 

 

 

Static route

An IP route you place in the IP route table.

No entries

6-36

 

 

 

 

Source interface

The IP address the router uses as the source address

The lowest-numbered

6-26

 

for Telnet, RADIUS, or TACACS/TACACS+ packets

IP address on the

 

 

originated by the router. The router can select the

interface the packet is

 

 

source address based on either of the following:

sent on.

 

 

• The lowest-numbered IP address on the

 

 

 

 

interface the packet is sent on.

 

 

 

• The lowest-numbered IP address on a specific

 

 

 

 

interface. The address is used as the source for

 

 

 

 

all packets of the specified type regardless of

 

 

 

 

interface the packet is sent on.

 

 

 

 

 

 

 

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