topic Re: Need some help in Networking in Operating System - HP-UX

Need some help in Networking

Sandip Ghosh — Mon, 03 Mar 2003 22:51:27 GMT

Some one requested to remove some tcp connection from the server and I had given the route -f to remove that tcp connection. As a result the total system gone to a hung mode.

What will be the better explanation to save myself?

Re: Need some help in Networking

Steven E. Protter — Mon, 03 Mar 2003 22:55:14 GMT

You took out all tcp connections to the server on all ports.

That was too much.

If you need to delete a route, which helps connect different computer netowrks or computers to the Internet, you can use route delete ip_address

The request you've posted isn't specific enough to go on. Please expand the problem definition.

SEP

Re: Need some help in Networking

Patrick Wallek — Mon, 03 Mar 2003 22:57:08 GMT

What exactly do you mean "remove some tcp connection from the server"? What exactly were you trying to remove?

The 'route -f ' command removed some of your routing table entries. It sounds like it probably deleted the route that some of the clients were using to connect.

You probably need to re-establish your routing table first and see if that helps.

Re: Need some help in Networking

Paul Sperry — Mon, 03 Mar 2003 23:01:24 GMT

The route command was the wya to go bu the -f option does the following

-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.

you should have used the delete option

delete Delete the specified host or network route from
the network routing table.

route delete

Re: Need some help in Networking

Sridhar Bhaskarla — Mon, 03 Mar 2003 23:07:56 GMT

Hi,

If you can go to the console, then login and run the command

/sbin/init.d/net start

This will add all the routes.

You can use ndd to disconnect individual connections. It is unsupported and I would not give that command.

-Sri

Re: Need some help in Networking

Sandip Ghosh — Mon, 03 Mar 2003 23:11:34 GMT

Now everything is running fine after stopping and starting the net. But what would be the best explanation?

Re: Need some help in Networking

pap — Mon, 03 Mar 2003 23:11:42 GMT

I think A.Costa is finding way to save himself from further explanation to his higher authorities. He made a mistake that is sure though.

Please correct me Mr.Costa if I am wrong.

Thanks,
-DB

Re: Need some help in Networking

Sridhar Bhaskarla — Mon, 03 Mar 2003 23:16:07 GMT

Hi,

Explanation is - misinterpreting the man page.

-Sri

Re: Need some help in Networking

Patrick Wallek — Mon, 03 Mar 2003 23:41:38 GMT

Your explanation is that you made a mistake and used the wrong command syntax. BUT, you learned from it, right?

One of my previous supervisors told me one time "if you don't make some mistakes, you're not doing anything."

The biggest thing in this business - admit when you make a mistake and LEARN from it. Don't make the same mistake twice and don't try to cover it up.

Re: Need some help in Networking

Mark Ellzey — Tue, 04 Mar 2003 15:41:20 GMT

Hi,

If you meant to remove some TCP ports from processing requests, see /etc/services.

Regards,
Mark

Re: Need some help in Networking

W.C. Epperson — Wed, 05 Mar 2003 13:33:59 GMT

The best explanation to save yourself is to admit that you misunderstood the documentation and accidentally blew away the whole routing table instead of the entry you wanted to remove. And give them this quote from Robert E. Lee: "Good judgement is a result of experience. Experience is a result of bad judgement."

This is a classic sysadmin mistake, and probably happens almost as often as the
"rm * .tmp" folly. I still remember when flushed the route table on an AIX box by mistake. Not to mention the time I ran "initrin" on an HP3000 to see what it did....