Multiple gateways

  • Thread starter Thread starter Jeniffer K
  • Start date Start date
J

Jeniffer K

Dear NG,

We have two internet connections, cable and DSL as a backup, we would like
to start hosting our own exchange server, the exchange server is a DC with
two nics and gateway'ing to the cable, we don't feel like hosting exchange
over cable because we cant get a static ip so we decided to use the second
nic with the DSL where we have a block of 5 usable IP's, my question is will
I have an issue if I register two ip's to the DNS considering that its a DC?
what will become the default route considering that I want to keep cable as
the default route? will exchange always route the DSL? here is an example on
how I plan do this...

NIC 1 - Currently registered with DNS
IP = 192.168.10.200 - Nat'ed behind the cable router
SM = 255.255.255.0
GW= 192.168.10.1
DNS= 192.168.10.200

NIC 2 - Currently not used
IP = 192.168.20.200 - Nat'ed behind the DSL router
SM = 255.255.255.0
GW = 192.168.20.1
DNS = 192.168.20.200

SMTP will be configured to listen to All Assigned ip's

is this ok?

Thanks for your help
 
This sounds a pretty bad idea all round. Here are just a few of the
problems.

1. You cannot have two active default routes on a machine, no matter how
many NICs it has. The default route should point to the active Internet
router.

2. Having a multihomed DC causes all sorts of odd problems with name
resolution and browsing. It can be made to work (as in sbs server) but it is
not recommended.
 
any recommendations?

Bill Grant said:
This sounds a pretty bad idea all round. Here are just a few of the
problems.

1. You cannot have two active default routes on a machine, no matter how
many NICs it has. The default route should point to the active Internet
router.

2. Having a multihomed DC causes all sorts of odd problems with name
resolution and browsing. It can be made to work (as in sbs server) but it
is not recommended.
Click to expand...
 
You could stay with one NIC in the server, but set it to use a different
default gateway from the workstations.
 
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