how to remove a route on the host

[Hanry Zhou]

I have a route, and can see from netstat -rn:

destination gateway Flags ...
10.1.5.2 10.1.5.3 UH ...

What command to remove this entry?

I tried:
route delete 10.1.5.2
and:
route delete 10.1.5.2 10.1.5.2

but, they are not working.

Thanks!

[Sandman!]

Your routing entry looks incorrect. It's a route to a (remote) host thru a gateway as the destination and gateway IPs are different. The Flags should be UGH instead of UH which would be for a (local) host on a local interface in which case the destination and gateway should be the same IP. Could you post the output of the cmd below:

# netstat -rn

[Hanry Zhou]

I know it is incorret, that is why I wanted to remove it.

Now, I just need the help on the command to remove this entry from netstat -rn.

[Sandman!]

Well then try the cmd below:

# netstat delete host 10.1.5.2 10.1.5.3 1

~hope it helps

[A. Clay Stephenson]

route delete host 10.1.5.2 10.1.5.3

[Sandman!]

Ooops...don't know what i was thinkin'. Change my cmd to...

# route delete host 10.1.5.2 10.1.5.3 1

[Hanry Zhou]

it is not working:

netstat -rn:
Destination Gateway Flags
10.1.5.2 10.1.5.2 UH

route delete host 10.1.10.2 10.1.10.2 1
delete host 10.1.10.2: gateway 10.1.10.2: no such route


I can not remove the entry.
Please pay attention on the ip, the destination and gateway have the same IP.

[Hanry Zhou]

Sorry, following is the output I am getting

route delete host 10.1.5.2 10.1.5.2
delete host 10.1.5.2: gateway 10.1.5.2: no such route

[A. Clay Stephenson]

>>Please pay attention on the ip, the destination and gateway have the same IP.

I did pay attention; your original posting of the output of netstat -rn was wrong.


One possible way to fix you is to remove all entries that specify a remote host for a gateway.

route -f

You should then immediately add back the needed routes; at a minimum the default gateway.

route add default 10.1.0.1 1
substituting the correct ip address or hostname for 10.1.0.1

[A. Clay Stephenson]

If you do choose to try route -f, do it from the console.

[Sandman!]

If none of the suggestions so far worked then only a reboot would be able to fix it. Verify that /etc/rc.config.d/netconf file has the correct entries before rebooting or you would end up having the same problem as before.

[Hanry Zhou]

Is this command "route -f" going to remove all routes on this host? I thought it would only remove these routes whose destination are host.

I did perform this command, and as the result of that, I lost the primary connection. I wish it could be explained better.

I restarted ./net start, so the connections got back now, but the entry is till there.

[Sandman!]

You need to correct the entries in the netconf file before proceeding to restart networking. Also you could attach the contents of the netconf file here.

[Padma Asrani]

Hi

You can delete using

# route delete host 10.1.5.2 10.1.5.3 1

Regards
Padma

[Hanry Zhou]

this entry was manually added in, not by netconf file.

Padman, I have already tried that command. With or without "1" , all don't work.

It seems I have to reboot the server to get rid of this entry which could not be done now.

[Keith Jahn]

If the IP address of a card in the server is 10.1.5.2, you wil always see "10.1.5.2 10.1.5.2 UH" in "netstat -m".

[Padma Asrani]

Hi

So you wanted to get rid of
10.1.5.2 10.1.5.2 entry in netstat -r don't you?

It the command I gave you works for me, please let me know what the output of
router delete host 10.1.5.2 10.1.5.2 1

So the format is
route delete host 1

Regards
Padma

[Hanry Zhou]

Keith is right. I have to unplumb the device first before the entry could be gone in netstat -rn.

I am still wondering why after "route -f" , I lost primary connection, may lost all connections...