devstack采用ml2 ovs的方式进行部署的时候,官方给出的网路配置方法为:
	
		- 
			q_plugin=ml2
 
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			enable_tenant_vlans=true
		
 
 如果采用这种配置方式,在部署的过程中回报如下错误:
	
		- 
			unable to create the network. no tenant network is available for allocation.
 
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			net_id=
 
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			die_if_not_set 396 net_id 'failure creating net_id for  e0c2e57099ea405faa861d124ce2a3cd'
 
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			 local exitcode=0 
 
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			[call trace]
 
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			./stack.sh:1201:create_neutron_initial_network
 
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			 /home/src/devstack/lib/neutron:396:die_if_not_set
 
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			/home/src/devstack/functions-common:245:die
 
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			/home/src/devstack/functions-common:396 failure creating net_id for e0c2e57099ea405faa861d124ce2a3cd
		
 
这是由于在创建network的时候需要先去取vlan id,但是这里没有配置vlan range,所以创建网络报错.
解决方法: 在localrc中增加vlan range的配置项,比如:
	
		- 
			q_plugin=ml2
 
- 
			enable_tenant_vlans=true
 
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			ml2_vlan_ranges=physnet1:1000:2000 
		
 
                                   
              
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