When using a network extension from on-premises to Azure VMware Solution (AVS) using VMware HCX, high latency and connectivity issues may occur to the destination cluster in AVS.
Network monitoring tools detect IP TTL zero errors, indicating potential routing loops between on-premises and AVS environments.
Applications running on the extended network experience timeouts, packet loss, or severe performance degradation.
When removing the network extension, connectivity and performance return to normal, confirming the issue is directly related to the network extension configuration.
Steps to validate:
Network performance monitoring shows significant latency increase after network extension deployment
Network devices (firewalls, routers) report IP TTL zero errors in their logs
Packet captures reveal packets with decreasing TTL values that never reach their destination
Tracing packets through the network shows circular routing patterns
Applications experience timeouts or extremely slow response times
Removing the network extension immediately resolves the issue
HCX Network Extension deployments to Azure VMware Solution may experience latency and routing loop issues due to several factors:
These issues are particularly prevalent in new deployments because:
If the error persists after following these steps, contact Broadcom Support for further assistance.
Please provide the below information when opening a support request with Broadcom for this issue: