[NTLUG:Discuss] Routing question

[Josh]

Without fully understanding how the network is setup server/Gateway-wise
it is hard to tell exactly what may be the problem. Something else that
would be of interest to me would be what exactly you mean by "primary
network failure". 

Are you gateway routers setup with a secondary address on the same
ethernet port, running multiple ethernet ports, etc.?

It could also be directly related to an issue with each machine
recognizing that the primary gateway is down and switching to the
back-up gateway address. Typically in a situation such as this not all
machines will immediately recognize and make the switch. I have even
seen in some cases just trying to ping from a machine that has not
switched to it's backup will not force it to go to the secondary even
when the first fails. It'll just continuosly fail.

Just guestimating but I would say you may have an engineering issue with
your network scheme that may need to be addressed. Depending on what
your goal is there may be a better way to set things up without having
to go to a seperate wire. I am happy to help just give a few more
tidbits(router configs, what type of failure, etc.).

Josh

Bug Hunter wrote:
> 
>   I need help from a real routing expert.
> 
>   We have two networks on the same wire.  One is being used as a backup
> network, with the secondary domain name server living on the backup
> network.  All machines have dual ip addresses on one nic card, and are
> running RedHat 6.1 or better.  The default gateway points to the primary
> network gateway.
> 
>   We had a primary network failure, and we were unable to contact the
> servers using the secondary ip address set.  It appears they wanted to
> send the answers out the primary gateway, even though the secondary
> gateway provided the request.
> 
>   Can someone help me make this work?
> 
> thanks,
> bug
> 
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