Solved

Problem with two NIC's in one server

Posted on 2009-04-09
6
528 Views
Last Modified: 2012-05-06
I have a server running Server2003 with IIS and Citrix Secure Gateway. It has a dual NIC. One NIC is configured with the IP of our Citrix web access page . The other is configured with the IP for the secure gateway. Both NIC's are configured with the same subnet, and default gateway. When I close the tcp-ip properties on either NIC, Windows gives this warning.
Multiple default gateways are intended to provide redundancy to a single network (internet/intranet). They will not function properly when the gateways are on two separate disjoint networks such as one on your intranet and one on the Internet. Do you want to save this configuration?"
I chose yes and everything seemed fine. After a while the web page became unavailable. Disabling and enabling or repairing the connection on the NIC's fixes the problem temporarily.
I have read that you cant have two NIC's in the same server on the same subnet.

0
Comment
Question by:PatTheThird
  • 4
6 Comments
 
LVL 2

Expert Comment

by:mcnich
ID: 24109122
True, you cannot have multiple NIC's on the same subnet.  The server will be confused.
0
 
LVL 16

Accepted Solution

by:
ccomley earned 500 total points
ID: 24109222
I believe you CAN have two NICx on the same subnet but you do NOT need to specify the default gateway with each.

It's a misleading dialogue, the "default gateway" is NOT a parameter associated with the individual NIC but with the server as a whole.

So my first suggestion would be to remove the D/G parameter from one of the NICs and see how you get on.

BUT

If it still misbehaves, disable one NIC, and add the second IP address you had been using on it to the second NIC via the "Advanced" config. That way you can continue to use different IP addresses for your Citrix and IIS (presumabyl coz you might move one or the other service to a different physical server one day?) but the single NIC will carry all the traffic.
0
 

Author Comment

by:PatTheThird
ID: 24109345
I tried removing the d/g from one NIC. This resulted in applications not launching.
0
New My Cloud Pro Series - organize everything!

With space to keep virtually everything, the My Cloud Pro Series offers your team the network storage to edit, save and share production files from anywhere with an internet connection. Compatible with both Mac and PC, you're able to protect your content regardless of OS.

 

Author Comment

by:PatTheThird
ID: 24109359
Would a reboot be necessary after making that change?
0
 

Author Closing Comment

by:PatTheThird
ID: 31568614
You are the man
0
 

Author Comment

by:PatTheThird
ID: 24110745
Moving both IP's to one NIC was the way to go for this situation.
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Join Greg Farro and Ethan Banks from Packet Pushers (http://packetpushers.net/podcast/podcasts/pq-show-93-smart-network-monitoring-paessler-sponsored/) and Greg Ross from Paessler (https://www.paessler.com/prtg) for a discussion about smart network …
Most of the applications these days are on Cloud. Cloud is ubiquitous with many service providers in the market. Since it has many benefits such as cost reduction, software updates, remote access, disaster recovery and much more.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now