Forum Discussion
Dave_Whitla_254
Nimbostratus
NimbostratusVE cannot establish TCP connections from VLAN interfaces to other guests on untagged ports of the same VLAN
I've just spent a couple of days scratching my head on this one. I may just be slow, but in any case, to spare others the pain, here's the solution.
First the problem.
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qe_102628Nimbostratus
NimbostratusWhen running on VMware, BIG-IP VE takes advantage of virtualized hardware TCP checksum offload - the VMXNET3 NIC handles this.
In XenServer, Hypervisor VLAN tagged packets are passed to external devices with correct framing information. Leaving the tmm generated checksum off improves performance and reduces hypervisor load. If you're forced into a corner where you must do the unsupported dance of passing guest tagged packets around, this solution is excellent - hooray for BIG-IP's flexible architecture.