Discussion

For a quickly skimmable view of the routing-table entries, use the terse version of
the show route command:
aviva@RouterA> show route terse
inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
A Destination P Prf Metric 1 Metric 2 Next hop AS path
* 10.0.16.0/24 D 0 >fe-0/0/0.0
* 10.0.16.1/32 L 0 Local
* 10.0.21.0/24 D 0 >se-0/0/3.0
* 10.0.21.1/32 L 0 Local
* 192.168.42.1/32 D 0 >lo0.0
__juniper_private1__.inet.0: 2 destinations, 2 routes (2 active, 0 holddown, 0
hidden)
+ = Active Route, - = Last Active, * = Both
A Destination P Prf Metric 1 Metric 2 Next hop AS path
* 10.0.0.1/32 D 0 >lo0.16385
* 10.0.0.16/32 D 0 >lo0.16385
You may wonder how the router has any addresses in its routing tables when no
routing protocols are running and you haven’t configured any static routes. When
you configure interfaces, the JUNOS software automatically puts routes in the routing
table. For the routing-table examples in this recipe, the following interfaces and
interface addresses are configured:
aviva@RouterA> show configuration interfaces
fe-0/0/0 {
unit 0 {
family inet {
address 10.0.16.1/24;
}
family iso;
family inet6 {
address 9009:1::1/64;
}
}
}
se-0/0/3 {
unit 0 {
family inet {
address 10.0.21.1/24;
}
family iso;
family inet6 {
address 9009:1::3/64;
}
}
}
lo0 {
unit 0 {
family inet {
address 192.168.42.1/32;
}
254 | Chapter 8: IP Routing
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