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From "sudharma jain (JIRA)" <>
Subject [jira] [Created] (CLOUDSTACK-9098) Windows VMs fail to access internet
Date Wed, 02 Dec 2015 04:31:10 GMT
sudharma jain created CLOUDSTACK-9098:

             Summary: Windows VMs fail to access internet
                 Key: CLOUDSTACK-9098
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
            Reporter: sudharma jain

If we deploy a Windows 2008 R2 64 bit server with 2 nics; default gateway is shown for both
the NICs.
Now, based on my findings Windows will experience issue if we have multiple default gateway
assigned as explained in "Multiple Default Gateways Can Cause Connectivity Problems" ([]).

Create a Windows VM with Multiple NICs
Ensure that only one of the NICs can actually access internet (set that as default NIC in
Try to access internet

The fix can be made using interface metric. The default automatic metric for interfaces is
10 or 20. The lower the metric, the higher the preference to use it. So, we have to enter
metric higher than 10/20 for the interfaces we don't want to use. This is because if Windows
has multiple interfaces connected to several networks that use DHCP, it installs default gateways
for all those interfaces. By default, Windows sets the metric of the default gateways to the
same, effectively leading to random selection of default gateway.
So from Window stand point the above mentioned issue can be resolved by setting metric for
NICs inside guest OS.

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