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From "Murali Reddy (JIRA)" <>
Subject [jira] [Created] (CLOUDSTACK-6925) [OVS] get rid custom logic to create bridges on hosts in the XenServer pool
Date Tue, 17 Jun 2014 11:36:02 GMT
Murali Reddy created CLOUDSTACK-6925:

             Summary: [OVS] get rid custom logic to create bridges on hosts in the XenServer
                 Key: CLOUDSTACK-6925
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
    Affects Versions: 4.2.0
            Reporter: Murali Reddy
            Assignee: Murali Reddy
             Fix For: 4.4.0

In XenServer, when we created a GRE tunnel network, they don't have a PIF attached it. XenServer
treats network without a PIF attached as internal network. In a pool, XenServer internal network
is visible across the hosts in the pool, but bridge is created only on the first host on which
VIF connected to internal network is started. On rest of the hosts when VM is started, xapi
fails with VM_REQUIRES_NETWORK exception. CloudStack had workaround for this problem where
it creates a dom0 VIF connected to the network. Which plugged and unplugged to ensure bridge
is created on all hosts in the pool. This approach is error prone and resulted in multiple

Recommended way by XenServer, is to mark the network other-config param assume_network_is_shared
set to true.


This will ensure, when a VM connected to a internal network is launched on any host in the
pool, bridge is automatically provisioned.

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