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dafunkphenom
Contributor
Contributor

Replication and Zone transfer problems between VM's on 2 physical hosts.

I have a virtual AD environment setup with 2 physical hosts that have virtual machines on each host that can all communicate with each other. I do this by configuring one of my virtual windows 2003 boxes as an RRAS router bridged to my NIC on each physical host. Behind the RRAS router on each physical host I have multiple Windows 2003 and XP machines configured using VMWARE "teams" function.

Each physical host contains machines that simulate it's own Forest and I have a DNS domain controller for each Forest.

I have been getting all kinds of NTDS replication and DNS Zone transfer errors. As a test I ran a consistent ping from one of my domain controllers on Physical host A to one of my Physical host B. Then I went to the VM on physical host B and tried to access a share on my Physical Host A machine and I noticed my ping was returning inconsistent "TTL expired in transit" messages.

Reply from 192.168.54.30: bytes=32 time=2ms TTL=124

Reply from 192.168.2.1: TTL expired in transit.

Reply from 192.168.54.30: bytes=32 time=2ms TTL=124

Reply from 192.168.54.30: bytes=32 time=189ms TTL=124

Reply from 192.168.54.30: bytes=32 time=158ms TTL=124

Reply from 192.168.2.1: TTL expired in transit.

Is there an issue with setting up an environment like this if only using 1 physical NIC? Would it be better to add another physical network card? Any other ideas are more than welcome.

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Peter_vm
Immortal
Immortal

If performance of your hosts is good, disable Offloading on advanced properties of your physical NICs. Also disable TCP Chimney if you use 2003 SP2 as host OS.

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dafunkphenom
Contributor
Contributor

Physical Host A = XP Pro sp3

Physical Host B = Vista Home Premium

Thanks for the suggestion. I'll give it a shot.

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