Hello,

In the past we had the same problem,

Now we are using two IBM2210 router. One router is our default gateway. The
second one is a backup router.
Between this two routers, there is a protocol called VRRP, which is
responsible for switch the IP addresses
between default gateway and backup router.

p.e., if the default gateway dies, the backup router gets the adresse from
the failing default router and is now
working as default gateway.

All you have to do  is to ping your default gateway every xxx minutes. If
you can't reach this gateway you must
clear the arp cache on your AIX machine. After that, you're using the
backup router as your default gateway.

For more informations on VRRP see RFC 2338

Sorry for my bad english.

Sincerely

Swen Jedlicka






Schiffinger Ralph 2100 <Ralph.Schiffinger AT ERSTEBANK DOT AT> am 06.09.99
07:00:29 GMT

Bitte antworten an Discussion of IBM NetView and POLYCENTER Manager on
      NetView <NV-L AT UCSBVM.UCSB DOT EDU>

An:    NV-L AT UCSBVM.UCSB DOT EDU
Kopie:  (Blindkopie: Swen Jedlicka/nbg/DE)
Thema: AW: Default gateway

Sometimes having the same problem.
And it's NOT the gateway which is causing the trouble.
It's MY Fddi-interface which looses it's connection to our backbone.
Even have to reboot my machine.
There's just no other way to reconnect to our Fddi-bacbone.

My work-around:

Run a job (shell-script) every 10 minutes (crontab).
Ping your default gateway.
If you cannot reach it, ovstop netmon.
Plus any other action you want (alarms?).

Maybe it's a kludge, but at least it's simple, quick and dirty(?).
And fortunately i've planned for 2 network interfaces on my machine.
IF#1 used for "managing the network".
IF#2 used for "access to the manager-machine".
Highly recommended.

HTH.
Regards, Ralph.
iT-AUSTRIA / OE2100 / TK
Tel  (mobil)  0664 1908469
Tel  (iT-A)    21717 58948
FAX (iT-A)    21717 58979
Mailto:Ralph.Schiffinger AT erstebank DOT at


> -----Ursprüngliche Nachricht-----
> Von:  Paul Fordy [SMTP:paul.fordy AT VIRGIN DOT NET]
> Gesendet am:  Dienstag, 07. September 1999 08:29
> An:   NV-L AT UCSBVM.ucsb DOT edu
> Betreff:      Default gateway
>
> I'm using Netview 5.1 on AIX 4.2.1 and recently hit a problem where the
> default
> gateway was unavailable and Netview reported all sorts of devices as
being
> down
> because it could not longer reach them.
>
> How can I improve the reliability by not relying on one single device?
> I'm not aware
> of a way of having a second default gateway.
>
> Thanks
> Paul Fordy