| Author |
Message |
Donald
Guest
|
 Posted:
Fri Oct 14, 2005 8:51 am Post subject:
Network Load Balancing Failed |
|
|
Hi all,
Could you shed some light? In a simple lab, I had two Window 2003 Standard
servers with one network card, using multicast, network load balancing.
Websites were configured to use the shared ip. Requests were taken by the
first and when I failed it, the second automatically picked up the web
requests.
In production, the servers were set to use Network Load Balancing, but any
web requests to the shared ip failed. A couple of glaring differences. Both
servers had more than one network card. The servers were in one subnet while
the client was in another. The test lab had everyone in one simple subnet.
Lastly, I was using multicast, should I use unicast because I have more than
one network card? Do I have to check if my networking equipment allows multi
or unicast traffic?
Thanks, |
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|
 |
Ryan Sokolowski [MVP]
Guest
|
| Posted:
Fri Oct 14, 2005 8:50 pm Post subject:
Re: Network Load Balancing Failed |
|
|
Verify a few other things first:
| Quote: | Ensure that there is routing properly configured between the subnets.
Ensure that all the necessary name resolution services are configured
properly (it's easy to resolve names via NetBIOS broadcasts when on a
single subnet and not so easy when not) - DNS, WINS, etc.
Ensure that you only have a single gateway per server, not per NIC
Multicast traffic requires support when crossing multiple subnets.
Routing protocols like IGMP (Internet Gateway Multicast Protocol) need to
be enabled / configured to pass multicasts between subnets, as this would
typically not be desirable in a standard network architecture...
|
Hope this helps...
--Ryan
--
Ryan Sokolowski
MVP - Windows Server - Clustering
MCSE, CCNA, CCDA, BCFP
"A troubleshooter's best tool is the Event Viewer and understanding the
events and messages contained therein."
This posting is provided "AS IS" with no warranties, and confers no rights.
"Donald" <Donald@discussions.microsoft.com> wrote in message
news:5CA7CC3C-FCC2-4949-AD2A-92084B9D3087@microsoft.com...
| Quote: | Hi all,
Could you shed some light? In a simple lab, I had two Window 2003
Standard
servers with one network card, using multicast, network load balancing.
Websites were configured to use the shared ip. Requests were taken by the
first and when I failed it, the second automatically picked up the web
requests.
In production, the servers were set to use Network Load Balancing, but any
web requests to the shared ip failed. A couple of glaring differences.
Both
servers had more than one network card. The servers were in one subnet
while
the client was in another. The test lab had everyone in one simple
subnet.
Lastly, I was using multicast, should I use unicast because I have more
than
one network card? Do I have to check if my networking equipment allows
multi
or unicast traffic?
Thanks, |
|
|
| Back to top |
|
|
Chuck Timon [MSFT]
Guest
|
| Posted:
Mon Oct 17, 2005 4:50 pm Post subject:
Re: Network Load Balancing Failed |
|
|
You need to review
http://support.microsoft.com/default.aspx?scid=kb;en-us;197862
--
Chuck Timon, Jr.
Microsoft Corporation
CCS Beta Engineer
This posting is provided "AS IS" with no
warranties, and confers no rights.
"Donald" <Donald@discussions.microsoft.com> wrote in message
news:5CA7CC3C-FCC2-4949-AD2A-92084B9D3087@microsoft.com...
| Quote: | Hi all,
Could you shed some light? In a simple lab, I had two Window 2003
Standard
servers with one network card, using multicast, network load balancing.
Websites were configured to use the shared ip. Requests were taken by the
first and when I failed it, the second automatically picked up the web
requests.
In production, the servers were set to use Network Load Balancing, but any
web requests to the shared ip failed. A couple of glaring differences.
Both
servers had more than one network card. The servers were in one subnet
while
the client was in another. The test lab had everyone in one simple
subnet.
Lastly, I was using multicast, should I use unicast because I have more
than
one network card? Do I have to check if my networking equipment allows
multi
or unicast traffic?
Thanks, |
|
|
| Back to top |
|
|
|
|
|
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