Need udp fragmentation packet reorder applied to Azure Subscription

Hi, you need to enable “out-of-order UDP fragment reassembly” on the platform side, a flag that Microsoft activates per subscription/region and which is not self-service. To get it: open a Support ticket specifying “Enable out-of-order UDP fragment reassembly for subscription in ”; if the portal blocks you, use the CLI (az extension add -n support then az support ticket create --service-id virtual-network --problem-classification-id virtual-networking-networking-issue --title "Enable out-of-order UDP fragment reassembly for <SUB-ID>" --description "..."), alternatively create a “Billing/Subscription” case and ask the Networking team for routing, or (if you have a plan) a technical ticket under Virtual Network/Load Balancer. Include: Subscription/Tenant ID, regions, Resource IDs involved (VNet/LB/NAT/Firewall), application impact, PCAP showing out-of-order UDP fragments dropped, confirm you've already tested MTU. Mitigations while waiting: Avoid fragmentation (prefer TCP or smaller payloads), lower MTU/MSS (e.g., 1400–1350; Win netsh interface ipv4 set subinterface "<IF>" mtu=1400 store=persistent, Linux ip link set dev eth0 mtu 1400), limit EDNS(0) (e.g., 1232 bytes) or force TCP fallback for DNS, enable IKEv2 fragmentation/MSS clamping on VPNs