route -f impact

[tempsample]

Hi

Is there any impact in executing route -f command ?

P.S. This thread has been moved from HP-UX > System Administration to HP-UX > networking.
-HP Forum Moderator

[Patrick Wallek]

According to the 'route' man page:

 -f  Delete all route table entries that specify a
     remote host for a gateway.  If this is used with
     one of the subcommands, the entries are deleted
     before the subcommand is processed.

So, yes there will be some impact.

[Patrick Wallek]

Here's an exmple of what 'route -f' does on one my test servers.

Current routes:

# netstat -rn
Routing tables
Destination           Gateway            Flags   Refs Interface  Pmtu
127.0.0.1             127.0.0.1          UH        0  lo0        4136
1.1.150.134           1.1.150.134        UH        0  lan0       4136
1.1.150.0             1.1.150.134        U         2  lan0       1500
127.0.0.0             127.0.0.1          U         0  lo0           0
default               1.1.150.1          UG        0  lan0          0


Run 'route -f':

# route -f

Routes after:
# netstat -rn
Routing tables
Destination           Gateway            Flags   Refs Interface  Pmtu
127.0.0.1             127.0.0.1          UH        0  lo0        4136
1.1.150.134           1.1.150.134        UH        0  lan0       4136
1.1.150.0             1.1.150.134        U         2  lan0       1500
127.0.0.0             127.0.0.1          U         0  lo0           0

Notice that my 'default' route is now missing.  I now have no communication outside my current subnet.

I now have to add my default gateway back manually.

# route add default 1.1.150.1 1
add net default: gateway 1.1.150.1

# netstat -rn
Routing tables
Destination           Gateway            Flags   Refs Interface  Pmtu
127.0.0.1             127.0.0.1          UH        0  lo0        4136
1.1.150.134           1.1.150.134        UH        0  lan0       4136
1.1.150.0             1.1.150.134        U         2  lan0       1500
127.0.0.0             127.0.0.1          U         0  lo0           0
default               1.1.150.1          UG        0  lan0          0

[tempsample]

one of my team member has executed route -f .I can find that from history file.

but now when i run cmviewcl ,I am getting the below error.

Unable to receive reply from local cmclconfd. Connection timed out. Unable to initialize HOSTNAME_ADDRESS_FAMILY.

and also i am able to login only thorugh console.

when i check with netstat -rn,I cant find the default route.

Is it the reason ?

[Patrick Wallek · Accepted solution]

>>when i check with netstat -rn,I cant find the default route.

>>Is it the reason ?

More than likely, yes.

Add your default route back with the 'route add' command.