HP-UX

Hi all,

Could someone please explain to me how I should read this routing table,

Code:

# netstat -rn
Routing tables
Destination           Gateway            Flags Refs Interface  Pmtu
127.0.0.1             127.0.0.1          UH    0    lo0       32808
10.222.47.82          10.222.47.82       UH    0    lan0      32808
10.222.47.0           10.222.47.82       U     2    lan0       1500
127.0.0.0             127.0.0.1          U     0    lo0       32808
default               10.222.47.1        UG    0    lan0       1500

Thanks for all the help.

Rachael

Well the kernel reads it from the top down. The first column is the destination. The second column tells how to reach that destination. It looks for the first match. If the kernel wants to contact, say, 10.222.47.47, it scans down to the third item on the list and sees that 10.222.47.82 can reach it. It then rescans to find that 10.222.47.82 is a host it knows how to reach without further routing table help.

Lots of addresses need to go down to the default route which is always last ans which matches anything. These scan again to find the 10.222.47.0 entry and the 10.222.47.82 entry as above.

You are better off with netstat -nrv because the entries can have netmasks that affect which entry matches. The -v usually displays the netmask. The routing table you show is too simple to have any netmask weirdness but you should know about the -v option anyway.

Thanks Perderabo for your help, greatly appreciate it.

Rachael

The -v usually displays the netmask. The routing table you show is too simple to have any netmask weirdness but you should know about the -v option anyway.