[Bug 254036] Linksys USB3GIG fails to ping with large packets (maxfragsperpacket was increased)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254036

            Bug ID: 254036
           Summary: Linksys USB3GIG fails to ping with large packets
                    (maxfragsperpacket was increased)
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: usb
          Assignee: usb at FreeBSD.org
          Reporter: mibelanger at qnx.com

Problem with large UDP packets.
Vendor : 0x13b1 (Linksys)
Product : 0x0041 (Linksys USB3GIGV1)

After increasing net.inet.ip.maxfragsperpacket from 16 to 64.

ping -c1 x.x.x.x
succeeds
ping -c1 -s30000 x.x.x.x
succeeds
ping -c1 -s 60000 x.x.x.x
fails.

The packet is successfully sent.
The reply in not successfully received.

This does work in Linux.
I believe it is related to their support for Realtek RTL8152/RTL8153 Based USB
Ethernet Adapters.

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