GNS ICMP drops to real switches

Dear all,

Can anyone help me with this ICMP drop issue?

I have created a CCIE R&S lab in GNS and used QinQ to connect the virtual
router network to the real switches. All connectivity is working.

When I ping form a virtual router to a physical switch I receive drops
about 5 percent avarage.

I installed GNS on a windows 2008 R2 64bit machine. 1 Xeon procesors with 4
cores each and 6 Gbit of memory
Idle PC is calculated and at 0% when the lab is booted
The NIC is a HP-NC382i DP (Broadcom chipset)
I use the HP configuration tooling to create serveral VLAN on the adapter.
This VLAN is presented as a NIC in Windows which I use in GNS for a virtual
router to real switch connection

When I ping from the real switch to the virtual router I receive no drops
When I ping from router to router (virtually connected) I receive no drops
When I ping from router to router ( through the physical switch network) I
receive the same drops.
When I ping the cpu of the server and router is not increased.

When I use wireshark to snif the traffic on the physical interface of the
server I can see the ICMP request of the packet that times out. I do not
receive that packet on the switch behind the port.

When I look at the statistics of the NIC on the server I do not see any
errors
When I look at the statistics of the router interface I do not see any
errors
When I look at the statistics of the breakout switch port I do not see any
errors
When I look at the statistics of the real switch port I do not see any
errors

I updated the drivers to the latest version. which didn't have any result.
I replaced the cable. Which also didn't have any results

Any one have any experience with this same issue? Some setteing on the
adapter maybe. I have tried to enable or disable serveral things like flow
control but this doesn't seem to help

Thanks in advance

Regards,

Maarten Vervoorn

Blogs and organic groups at http://www.ccie.net
Received on Wed Aug 15 2012 - 09:34:17 ART