-- Virtual machines in Azure can support a larger MTU than the 1,500-byte default only for traffic that stays within the virtual network. A larger MTU isn't supported for scenarios outside of intra-virtual network VM-to-VM traffic. Traffic traversing through gateways, peering’s, or to the internet might not be supported. Configuration of a larger MTU can result in fragmentation and reduction in performance. For traffic utilizing these scenarios, utilize the default 1,500 byte MTU for testing to ensure that a larger MTU is supported across the entire network path.
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