GitHub user arpanbht edited a discussion: Cloudstack Issue while creating 
instance in arm based host

I have made a cluster which is arm based and trying to add nvidia jetson orin 
as a kvm host so its getting added to the management server and up and running.

But while creating a vm inside this host I am facing this kind of error


```bash

network/vnet/modifyvlan.sh -v 1460 -p -b br-1460 -o add ] failed. 
2026-03-23 17:07:12,207 WARN [kvm.resource.BridgeVifDriver] 
(AgentRequest-Handler-2:[]) (logid:3bdbe4c7) Process [18707] for command 
[/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh -v 1460 -p 
-b br-1460 -o add ] encountered the error: [Cannot find device 
"br-1460"/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh: 
line 37: /proc/sys/net/ipv6/conf/br-1460.1460/disable_ipv6: No such file or 
directoryCannot find device "br-1460.1460"Failed to create vlan 1460 on pif: 
br-1460.]. 
2026-03-23 17:07:12,211 WARN [resource.wrapper.LibvirtStartCommandWrapper] 
(AgentRequest-Handler-2:[]) (logid:3bdbe4c7) InternalErrorException 
com.cloud.exception.InternalErrorException: Failed to create vnet 1460: Cannot 
find device 
"br-1460"/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh: 
line 37: /proc/sys/net/ipv6/conf/br-1460.1460/disable_ipv6: No such file or 
directoryCannot find device "br-1460.1460"
Failed to create vlan 1460 on pif: br-1460. at 
com.cloud.hypervisor.kvm.resource.BridgeVifDriver.createVnet(BridgeVifDriver.java:338)
 at 
com.cloud.hypervisor.kvm.resource.BridgeVifDriver.createVnetBr(BridgeVifDriver.java:320)
at 
com.cloud.hypervisor.kvm.resource.BridgeVifDriver.plug(BridgeVifDriver.java:239)
at 
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVif(LibvirtComputingResource.java:3861)
at 
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVifs(LibvirtComputingResource.java:3438)
at 
com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:86)
at 
com.cloud.hypervisor.kvm.resource.wrapper.LibvirtStartCommandWrapper.execute(LibvirtStartCommandWrapper.java:52)
at 
com.cloud.hypervisor.kvm.resource.wrapper.LibvirtRequestWrapper.execute(LibvirtRequestWrapper.java:78)
at 
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:2280)
at com.cloud.agent.Agent.processRequest(Agent.java:813)
at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:1295)
at com.cloud.utils.nio.Task.call(Task.java:83) at 
com.cloud.utils.nio.Task.call(Task.java:29)
at java.base java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base java.lang.Thread.run(Thread.java:829) 
```
what is this error coming while creating an instance in this host give me 
solution

What is the problem? Cannot understand the error log.

GitHub link: https://github.com/apache/cloudstack/discussions/12876

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