Hi there I was just about to post a similar issue when I saw your post. We have a cluster of 3 AMD EPYC 9454 48-Core Processor hosts who have BCM57504 NICs in a LACP bond to 2 Dell S5248F-ON switches. We are seeing assymetrical network performance between VM's making the cluster unusable. In previous test setups we did not have this issue. The issues seems to manifest only for traffic between hosts over VLAN networks and SDNs do not seem to be affected. If we do an upload test over a virtual firewall we get the same numbers as you do. If we do some iperf tests we get this: (We will use the name VM1 and VM2 who are in the same VLAN network. For hosts we will use Host1 and Host2 in the names) VM1: 10.22.21.10 VM2: 10.22.21.20 VM1 (Host2) to VM2 (Host1) [cid:image002.png@01DBDEA1.6BFA2C60] VM2 (Host1) -> VM1 (Host2) [cid:image003.png@01DBDEA1.6BFA2C60] When we put these on the same host (Host2) VM2 -> VM1 [cid:image004.png@01DBDEA1.6BFA2C60] VM1->VM2 [cid:image005.png@01DBDEA1.6BFA2C60] I’m believing the underlying issue will be the same. If it’s not I will probably split my issue in a seperate post. We raised a ticket with Oracle Support for this (we are running OLVM, latest version) but it’s going very slow. The issue is stopping us from bringing our cluster into production. Met vriendelijke groeten, Domien Van Rompaey Security Engineer Cloud & ICT‑infrastructure | Security Tel +32 51 76 00 00 [https://website-api.dynamate.be/public/E-mailhandtekening/DYNAMATE-handtekening-2025.png]<https://eu.content.exclaimer.net/?url=https%3A%2F%2Fwww.christiaens.net%2F&tenantid=ZVNCIaYYEei0sAANOiIdVQ&templateid=a77e4c5517ffef11aaa700224881a89e&excomponentid=QmSgNQQYiLn8tySf2ahduif4VXkC3WopoLoX1zvQ2GM&excomponenttype=Image&signature=GOnsh4Hp6DH-Xj4cajPNV6HcS5LJ0ZyfxPfq7ULLltJVZozwGRMuswjq-lUHYO2r_VrMFg3gxZKUBylwq9kUoexZV3_OGjhAOW_SpwtucVEcX8g37NYAkwY_cVIBhxrvRJSuaJEFtReKhgywYHQKjoT8K37rRJSYtVzEczRKow-ngkhhMVZnddXcpwSdYtKng1n6L3rW_meRLt351aS5AZdQIbd2E0w04j-EvOP7SKyP6JP6Qm3CoKCAPpJsD6d9k2L6GykNIznP-6V0U6lgfjdUC-GDDHHU2_DRHbOY0Bqsfomd3F-sCSOlhCxP0vB_W5jGEDcEjwwsUvWH10WNoA&v=1> www.dynamate.be<https://eu.content.exclaimer.net?url=https%3A%2F%2Fwww.dynamate.be%2F&tenantid=ZVNCIaYYEei0sAANOiIdVQ&templateid=a77e4c5517ffef11aaa700224881a89e&excomponentid=mJkfg9wDAAm-NPNHLA-h1Gp6g0Lt8pD9czalgHZ86II&excomponenttype=Link&signature=WgWeiYEkOjsivAmIm0BRhtwsUT9rr4wGlv3wSti2L00pophZDWHMnNL4vxQMTM4XAWpnQAPt9AwPq4lmpbb1qqgMSQXoeP23bTBYaCd9vePz3xbTqzWaQsaC0p6FpD1IxFF1UudRgdnhFsHdOVz8Ea07M2taCT4n9o1NcoqcCIbNFheUmgpSCG2RMBOZfc-iLHbLwFpXZRgIAuVcOkzFM3guuzrUjJZU2-y9R6n0gGdB1rSzykZ6KntJqQdn7P1axILqhVNhxtTPctTOuZVrwPTQqjfmD2Te1yZGw6rZDck0HM5NKTxaIlXDGOJN-WXZsbyvWQHAzgnXP9uU5gbeUg&v=1> [https://website-api.dynamate.be/public/E-mailhandtekening/instagram-60-150.png]<https://eu.content.exclaimer.net/?url=https%3A%2F%2Fwww.instagram.com%2Fwearedynamate&tenantid=ZVNCIaYYEei0sAANOiIdVQ&templateid=a77e4c5517ffef11aaa700224881a89e&excomponentid=6lAc_cPk4Eu8CLiBuA5wHRXSaXoCCQVXtpuDysfsKYc&excomponenttype=Image&signature=cuzt6ZDMAc6xk_tBw3fXOEIHNKcTGjFADwQmJ87tihK9V1rnyaZQpuHSyWIrBESEVe9HPylx450UPJgUl4qDviJMFZyNMRUa-fjoUEs6Mv-7CFObodSsbN3rWV_Fz6bLYYzsLz2NIkzaR28TU6_O7B8UxrtZ5rUpSR8jnesKpvZ0TVZjCVo_TqYlOXFV0AFA0yTjkWcTiajK_iN1dMn0-MbKEjsQc7IApfQnh9s7k6vQoJmmSL3PnIR2m3rP0f1fPeUiNHcao4ZMuHGATuIoTCSc1lP-4vYn13WkMWcb-asVV0TK0nahN-6NHvtpK8zM4HGVf9-S0eqiIAixJde9-A&v=1> [https://website-api.dynamate.be/public/E-mailhandtekening/facebook-60-150.png]<https://eu.content.exclaimer.net/?url=https%3A%2F%2Fwww.facebook.com%2Fwearedynamate&tenantid=ZVNCIaYYEei0sAANOiIdVQ&templateid=a77e4c5517ffef11aaa700224881a89e&excomponentid=lShiU7qmAoteL9Acoc1oPBp3VYPs2pBZStvraifDYdk&excomponenttype=Image&signature=0kCoh92F0I_7IygnWZsbWonBkE2qMp2sjPz7lz1caMAYeutKE3g8pABECfqAAVed46M_YqjN_xxBNY4vMb4n2NS4SqExYtwjiAeOPoDIsuuVgJXL9lQi2Ps3wU29BFW0yC8yHDQy4_ceVLNF5JYBCxG35Zp8FE6G1bdVvtWpRKSlu37sp0eLBaj1kY8wtsGdZylTmtB4p1WRn629-ZSlaqq9Q0oSLWS8Wthbs6H1ns7Ydn1Ps9VVyjMMdH3n9XBtSRuTywVg-fKce5QHXQVWvUiDCGsebxhFsC8XblBxW-lZqrV3zHrGmwNJ_j_tXIpIebD6MDW7PcuhmHBtGQ7xFQ&v=1> [https://website-api.dynamate.be/public/E-mailhandtekening/linkedin-60-150-2.png]<https://eu.content.exclaimer.net/?url=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fwearedynamate&tenantid=ZVNCIaYYEei0sAANOiIdVQ&templateid=a77e4c5517ffef11aaa700224881a89e&excomponentid=sF3njAHyyRNEgZQpk6OZBmoP6g-Qw-8cUJu67gFRp3s&excomponenttype=Image&signature=eze6bOdWltBkzTkmJ666tsBPLZF-pkyWRW0hpAmcWRonsBKSoReuhSslcy2Ts_tNiZw2CUp6tJhAR0WX56CxszleleZaHPOmb_EjykFt6CkHL21hidxQzIjkaoRtq3Nc-uuHzqMbWzlcMKmVWBxfA_2VUCAZRzCgbmsXr5D2ubWV3tMcWAvp9mHk-YHa_yPyGoERIo6QZxEaRE6bnk1i-h30dfI9FPr3noSoQE4zDg52AmUh1En6ZjcVlBiRTXqbQVnmQQXc0iJ7gPkcrMnEEc7WQy13s0Bvdp6g4TkyA3yL_Lea73GtzD3SzbLlWicQQfMamrZuUucKV3zN4e9FAg&v=1>