RRAS with multiple NICs

  • Thread starter Thread starter Piotr
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Piotr

Hi,

I have a Win 2000 Server with 3 NICs. Two of them are connected to internet
by two different connections. Each of them has its own gateway configured.
This gives two routes for address 0.0.0.0, one for each interface. The
result is you can ping (and connect to) both interfaces at the same time
from outside (which is the point for this configuration).
First problem : from time to time one of interfaces becomes suddenly
unavailable for some time (30 seconds or more) causing all connections to
be broken. Apparently packets coming through first interface are forwarded
to the second interface (you can see it on Network Monitort) instead of
going back the same interface they came in.
Second problem: this configuration stops working completely after enabling
RRAS. Only one interface (public IP) can be seen (ping or whatever) from
outside. Seems like there can be only one route for address 0.0.0.0 when
RRAS is configured.
Can anybody have the idea what's causing and how to solve those problems?
It's very irritating considering this configuration works perfectly on linux
systems .

Andrzej.
 
W2K is designed to reliably use only one default gateway at a time with a second one
being configured for "dead gateway detection", so what you are experiencing is the
norm. One alternative may be to create static routes for access to a particular
adapter. The link below explains the configuration of default gateways on multihomed
computers. Also keep in mind that when you enable rras that if you select for vpn
also that "packet filtering" will be configured on one adapter which you can verify
in rras/IP routing/general. Look in the properties of the adapters for input and
output filters. --- Steve

http://support.microsoft.com/default.aspx?scid=kb;en-us;157025
 
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