Examine Routes in the Forwarding Table

Purpose

When you run into problems, such as connectivity problems, you may need to examine routes in the forwarding table to verify that the routing protocol process has relayed the correct information into the forwarding table.

Action

To display the set of routes installed in the forwarding table, enter the following JUNOS CLI operational mode command:

user@host> show route forwarding-table

Sample Output

user@R2> show route forwarding-table 

Routing table: inet

Internet:

Destination        Type RtRef Next hop           Type Index NhRef Netif

default            perm     0                    rjct    10     1

10.0.0.2/32        intf     0 10.0.0.2           locl   256     1

10.0.0.3/32        user     1 10.1.23.0          ucst   282     4 so-0/0/1.0  

10.0.0.4/32        user     1 10.1.24.0          ucst   290     7 so-0/0/3.0  

10.0.0.6/32        user     1 10.1.24.0          ucst   290     7 so-0/0/3.0  

10.1.12.0/30       intf     1 ff.3.0.21          ucst   278     6 so-0/0/0.0  

10.1.12.0/32       dest     0 10.1.12.0          recv   280     1 so-0/0/0.0  

10.1.12.2/32       intf     0 10.1.12.2          locl   277     1

10.1.12.3/32       dest     0 10.1.12.3          bcst   279     1 so-0/0/0.0  

10.1.23.0/30       intf     0 ff.3.0.21          ucst   282     4 so-0/0/1.0  

10.1.23.0/32       dest     0 10.1.23.0          recv   284     1 so-0/0/1.0  

10.1.23.1/32       intf     0 10.1.23.1          locl   281     1

10.1.23.3/32       dest     0 10.1.23.3          bcst   283     1 so-0/0/1.0  

10.1.24.0/30       intf     0 ff.3.0.21          ucst   290     7 so-0/0/3.0  

10.1.24.0/32       dest     0 10.1.24.0          recv   292     1 so-0/0/3.0  

10.1.24.1/32       intf     0 10.1.24.1          locl   289     1

10.1.24.3/32       dest     0 10.1.24.3          bcst   291     1 so-0/0/3.0  

10.1.36.0/30       user     0 10.1.23.0          ucst   282     4 so-0/0/1.0  

10.1.46.0/30       user     0 10.1.24.0          ucst   290     7 so-0/0/3.0  

100.100.1.0/24     user     0 10.1.12.0          ucst   278     6 so-0/0/0.0  

100.100.2.0/24     user     0 10.1.12.0          ucst   278     6 so-0/0/0.0  

100.100.3.0/24     user     0 10.1.12.0          ucst   278     6 so-0/0/0.0  

100.100.4.0/24     user     0 10.1.12.0          ucst   278     6 so-0/0/0.0 

[...Output truncated...]

What It Means

The sample output shows the network-layer prefixes and their next hops installed in the forwarding table. The output includes the same next-hop information as in the show route detail command (the next-hop address and interface name). Additional information includes the destination type, the next-hop type, the number of references to this next hop, and an index into an internal next-hop database. (The internal database contains additional information used by the Packet Forwarding Engine to ensure proper encapsulation of packets sent out an interface. This database is not accessible to the user.

For detailed information about the meanings of the various flags and types fields, see the JUNOS Routing Protocols and Policies Command Reference.