Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm trying to set up a redundant link from my Windows server (Dell R710 with 4 GigE ports) to my Cisco switch. I'd like to "failover" in case the first Ethernet link fails (e.g. NIC issue, cable issue). How would I go about doing this? Didn't find much on Google. I'm using Windows Server 2008 R2 Standard, if that matters.

share|improve this question

If your switch supports it I'd recommending bonding the ports together. When you've got all 4 ports bonded you should be able to have any one of them go down, unless theres an issue with the nic, and the rest continue transmitting.

Here's a LINK to a pretty decent article on bonding your NICs. Here's a LINK to a wiki article on LACP, which is what your switch needs.

share|improve this answer
Can you please give me some info on how to set this up on the windows side? The NIC is a Broadcom 5709c. – AX1 Dec 30 '10 at 21:58
Added a link in the answer, one thing to keep in mind you should make sure your switch is going to support it. If its a low end Cisco product theres a chance it wont. – ErnieTheGeek Dec 30 '10 at 22:11
Thanks for the link! Looking at it now. For the switch side, it's a Cisco SG300-28. On the cisco site (…) it says under "Port Grouping" that it has "Support for IEEE 802.3ad Link Aggregation Control Protocol (LACP)" - is that what I need? – AX1 Dec 30 '10 at 22:14
Yup, LACP is what you want. Heres a wiki article on it. – ErnieTheGeek Dec 30 '10 at 22:30

Bonding is one way to go, perhaps the right way to go.

The quick and dirty way, 2 separate NIC, 2 separate IPs, 2 separate switch ports, 1 DNS entry using round robin.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.