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Dual nic's

For fault tolerance I would like to have 2 nics on 1 box attached to seperate switches. Will this cause any problems? Two of the servers are WEB servers, so there may be some session state issues? DO I need to have them on different subnets?

2 REPLIES
Cisco Employee

Re: Dual nic's

Depends, depends, depends...

The fault tolerance (unless you are using etherchannel or 802.3ad) is completely up to the NIC and Operating System. Just having 2 NICs without any special configuration on those NIC will NOT usually provide any redundancy.

Re: Dual nic's

It all depends on OS being used, for Eg: NT/Win2K has special S/W that creates a virtual bundle with one logical address.

Sum OS like linux/Solaris can ahve multple NIC's on different subnets/VLAN's that provide load balancing.

Regards

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