On 4/22/21 11:00 AM, Mantas Mikulėnas wrote: > ... > I'm curious about what brought this problem into existence in the > first place. Why *is* it necessary to contact a random address within > the network? (If it's to check that the physical interface is working, > then just the fact that you somehow acquired a lease would be enough. no?) > The only non-destructive way I've found to test whether a real or virtual nic interface computes packet checksums properly is to send a small packet to a random address temporarily added to the suspect interface. If a bad udp checksum is detected, invert tx-checksum-ip-generic.
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