No such name A - Istio 1.4.6 multicluster tcpdump "dns.qry.name"

1

Hi, Team,

I set up two multicluster via Replicated control planes following

When I tcpdump and filter dns, got several “No such name A …” query response every few seconds on these “dns.qry.name”

1. "RemoreService.RemoteNameSpace.global.LocalNameSpace.svc.cluster.local"
2. "RemoreService.RemoteNameSpace.global.svc.cluster.local"
3. "RemoreService.RemoteNameSpace.global.cluster.local"

4. "RemoreService.RemoteNameSpace.global.ec2.internal"

5. "RemoreService.RemoteNameSpace.global.global"

6. "RemoreService.RemoteNameSpace.global.LocalNameSpace.global"

7. "RemoreService.RemoteNameSpace.global" (this query response good)

Are these DNS behavior expected?

If yes, does it mean all of the 7 format above can be used as “spec.hosts:” of ServiceEntry?

Btw, will these frequent routine queries impact the performance of multicluster?

Thanks!