RHEL7: Large GRE packet drop on bridge Interface when GRO on physical NIC is enabled

Solution Verified - Updated -

Issue

  • Large GRE packet drop on bridge Interface when GRO on physical NIC is enabled.
  • Dramatic performance loss for GRE packets if GRO is enabled.

Environment

  • Red Hat Enterprise Linux 7.3
  • GRE tunnelling
  • GRO enabled on passing through host's NIC
  • A typical configuration is, although this may differ:
VM1 (GRE->eth0) -- Host1 (vnet -> Linux Bridge --> eth0) -- Host2(eth0 <GRO ON> -> Linux Bridge --> vnet) -- VM2(eth0 -> GRE)

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In