Multipathing network possible?

I have a server that has 3 NICS as follows:

__________________________________________________ _______________________
IP Address Gateway
Internal 192.168.1.1/24 NULL
__________________________________________________ _______________________

External 10.0.0.1/24 10.0.0.50/24
10.0.0.20/24 10.0.0.50/24 (NLB
Address)
(manual interface
metic of 1)
__________________________________________________ _______________________

Cluster 10.0.0.30/24 ??????????????????????????
(coldfusion cluster, (manual interface metic of
1)
not server cluster)










__________________________________________________ _______________________
The routing table looks like this: ( nothing is static )


Active Routes:
Destination Netmask Gateway
Interface Metric
0.0.0.0 0.0.0.0 10.0.0.50
10.0.0.1 1
0.0.0.0 0.0.0.0 10.0.0.50
10.0.0.30 3
10.0.0.0 255.255.255.0 10.0.0.1
10.0.0.1 1
10.0.0.0 255.255.255.0 10.0.0.30
10.0.0.30 3

Default Gateway: 10.0.0.50
__________________________________________________ _______________________



Here is my problem:

A) If I leave the gateway address blank for the cluster NIC, I loose
connectivity to the external card altogether.

B) If I enter 10.0.0.50/24 as the gateway (which it is) I gain connectivity
to the external card's addresses, but I loose connectivity to the cluster
NIC altogether.


I'm told in Solaris this can be accomplished with "Network Multipathing".

Is there a built in solution for this?


For performance issues I can't just bind all 3 addresses to one card.



Thanks for any help or advice you can offer.

First, why don't you place your cluster interconnect in separate subnet?
This is preferable solution in such situation.

Second, you can create static routes on your servers which will be use
cluster adapter for interconnect (so this route will contain only one
destination address - address of another cluster member).



--
With best regards
Nickolay Domukhovsky, MCSA