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Dual Nic Cards

By jyimcse ·
An NT 4.0 PDC server has three NIC cards that are not load balanced. They have three separate IP addresses. The person who set this up states that if one of the nic cards fails users will still be able to log on and use network resources automatically. No DNS or WINS record pointers to the other NICs. Without configuring the NIC's for load balancing, I don't see how this can be done. First, Can it be done? Second what are the ramifications on having muliple Nics, multiple IPs on the PDC? Could it cause unnecessary network traffic?

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Dual Nic Cards

by gmscne In reply to Dual Nic Cards

Yes, this can be done. The other NIC and associated IP will only be used under certain circumstances. The route to the server through that IP has been designated as a low priority route and is a redundant circuit which is most likely an indirect connection. The main connection has been given precedence as the route to the server and will be tried first in all attempts to communicate. There will be some extra traffic but not much, especially compared to the insurance it provides.

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Dual Nic Cards

by jyimcse In reply to Dual Nic Cards

If the two connections have different IP addresses, then how can clients connect to the Server without manually repointing to the other IP. Wins would point to the first nic card only.

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Dual Nic Cards

by TechDictator In reply to Dual Nic Cards

The best way I know how to do this is through a Compaq NIC. The drivers support teaming. The two NICs can be setup for fail-over support or for load balancing.

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Dual Nic Cards

by jyimcse In reply to Dual Nic Cards

No software Load balancing or fail over is installed. The two NIC cards are active and have a separate IP address.

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Dual Nic Cards

by jyimcse In reply to Dual Nic Cards

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