Laurent CARON wrote:
Hi,
I'm trying to get high availability internet connection for the LAN of
my company.
I basically have two servers connected to the internet.
Each server has 2 dedicated internet connections hooked to 2 different
providers.
So far, I managed to get the servers to route the packets properly
(Thanks to the LARTC).
What I'd like to achieve now is that workstations connected to the lan
(Mainly windows, and a few linux boxes) can reach the outside world
without reconfiguration even in case of a server failure.
I tried setting up two default routers via dhcp.
The clients get the 2 default routes. But, when the first router is
down, the clients are unable to reach the internet.
A solution would be to use a proxy on both servers, but this is a
solution I do NOT want to use.
Do you have any good experience with this kind of setup, apart from
using heartbeat to get a "floating" IP address as the default gateway?
I have no experience in this, but my suspicion is that you could setup
the dhcpd in such a way to advertise the new route - surely most
networks can handle a 2-minute downtime?
Another route would be to use small subnets, with a server in each. Each
subnet has a single point of failure, but if that goes down, only a
small number of machines are affected. These servers, however, could be
setup in a partial-mesh style network, such that no single server
downtime will affect any other server. Again, I have no idea how
complicated this is in practice.
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