Communication issues when TEP traffic is fragmented.
Article ID: 418865
Updated On:
Products
VMware NSX
Issue/Introduction
- TEP traffic is sent with DF bit set so that fragmentation doesn't occur.
- TEP Gateway may be configured to clear DF bit.
- During packet captures of TEP traffic, under the TEP IP Header (the first IP header listed) you see the field changes
When Sent
When Received
- Packet Captures on the destination (receiving) host will show the Geneve packet Fragmented
Environment
VMware NSX
Cause
When a host receives fragmented TEP traffic it will not reassemble the packet and fragmentations will be dropped.
Resolution
Fragmentation of TEP traffic is not supported and the full network path needs to be configured to the same MTU size as set in the NSX Fabric including the physical underlay.
Additional Information
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