You have configured UBT on your CX switches, but now HTTPS-enabled websites will not load, which you suspect is due to the packet size. To resolve the issue, what should you configure on each device with funneled traffic?
When User-Based Tunneling (UBT) is configured and HTTPS-enabled websites fail to load, this often relates to issues with packet fragmentation. The solution is to enable IP fragmentation on the devices to allow large tunneled packets to be properly fragmented and reassembled.
Path MTU discovery is helpful but may be blocked in some networks.
Fragment reassembly is usually on the receiving end.
Jumbo frames may not resolve fragmentation across tunneled paths.
Therefore, enabling IP fragmentation is the most effective solution.
[References:, , Aruba UBT Deployment and Troubleshooting Guide, , HPE Aruba Networking Tunneling and MTU Best Practices, , ArubaOS-CX Network Configuration Manuals, ]
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