Dropping route from route table

Dropping route from route table

Post by Mitch Mitchel » Sun, 03 May 1998 04:00:00



Thank you in advance for any help......

I am runnning Redhat 5.0 with a router connected for access to the internet.
when I boot the machine and look at the IP routing table everything is fine.
It looks like this:

Destination    Gateway    Genmask    Flags    MSS    Iface
207.177.157.0    0.0.0.0            255.255.255.0    U    1500    eth0
127.0.0.0             0.0.0.0            255.0.0.0             U     3584
lo
0.0.0.0         207.177.157.30     0.0.0.0                 UG   1500  eth0

at this point everything works fine. I can get in and out to the internet
without a problem. Then after about 2 minutes the table looks like this:

Destination    Gateway    Genmask    Flags    MSS    Iface
207.177.157.0    0.0.0.0            255.255.255.0    U    1500    eth0
127.0.0.0             0.0.0.0            255.0.0.0             U     3584
lo

Then I can no longer gain access outside the gateway.

I have had a few people work on this including myself and we do not have a
clue what is causing it to drop the router. We had a RedHat 4.2 server
running for a long time on this same IP with the same router and everything
was fine but now this is happening.

Any idea how I can keep it from dropping this line from the IP routing
table?  I would really apreciate any help that you can offer.

 
 
 

Dropping route from route table

Post by Laurence Brockma » Fri, 08 May 1998 04:00:00


If you figure out what is happening can you let me know? I'm having the same
problem and I can't figure out why.

Laurence


> Thank you in advance for any help......

> I am runnning Redhat 5.0 with a router connected for access to the internet.
> when I boot the machine and look at the IP routing table everything is fine.
> It looks like this:

> Destination    Gateway    Genmask    Flags    MSS    Iface
> 207.177.157.0    0.0.0.0            255.255.255.0    U    1500    eth0
> 127.0.0.0             0.0.0.0            255.0.0.0             U     3584
> lo
> 0.0.0.0         207.177.157.30     0.0.0.0                 UG   1500  eth0

> at this point everything works fine. I can get in and out to the internet
> without a problem. Then after about 2 minutes the table looks like this:

> Destination    Gateway    Genmask    Flags    MSS    Iface
> 207.177.157.0    0.0.0.0            255.255.255.0    U    1500    eth0
> 127.0.0.0             0.0.0.0            255.0.0.0             U     3584
> lo

> Then I can no longer gain access outside the gateway.

> I have had a few people work on this including myself and we do not have a
> clue what is causing it to drop the router. We had a RedHat 4.2 server
> running for a long time on this same IP with the same router and everything
> was fine but now this is happening.

> Any idea how I can keep it from dropping this line from the IP routing
> table?  I would really apreciate any help that you can offer.

--
------
Laurence Brockman                       LRHA Unix System Admin



 
 
 

Dropping route from route table

Post by Jude Gabaldo » Thu, 04 Jun 1998 04:00:00


I had the same problem.  Upgrading the gated package solved it.  Get the rpm from
:

http://sunsite.unc.edu/pub/Linux/distributions/redhat/redhat-5.1/i386...

> > Any idea how I can keep it from dropping this line from the IP routing
> > table?  I would really apreciate any help that you can offer.

> --
> ------
> Laurence Brockman                       LRHA Unix System Admin



 
 
 

1. How Do Routing Table Entries Get Added to Routing Table at Bootup?

I have, what I think, is a simple question for the TCP/IP guys out there
who are familar with routing tables on AIX 4.1.5/4.2.1 in an IBM SP
environment. Or maybe not.

I have recently noticed that when I execute a 'netstat -r' on a
particular node in the SP environment, there are routing table entries
that I know I didn't put in there. I have to delete these "unwelcomed"
entries and re-add the correct ones. This is undesireable and maybe a
quick crash course in routing tables is justified. These unwelcomed
routing table entries seem to be automatically added right after I have
IPL'ed the node in question.

How did these routing table entries get added in the routing table? Does
anybody know the process?

Thank you in advance for your responses.

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