Asterisk: UDP checksum error

hello,

what Asterisk does when it receive RTP packets with UDP chekcsum error?

i have this win7, which shown by Wireshark that all udp packets originating from it has udp checksum error. Wireshark suggests that this maybe caused by 'UDP chekcsum offload'.

after i googled around. seems that with UDP checksum offloading feature enabled, the OS leaves the UDP checksum calculation task to the NIC. if this is true, than it shouldn't be a prolem because the packets will have a correct UDP checksum when they're on the wire.

but i'm experiencing broken voice quality on the other side. Asterisk server only forward approximately half of all the RTP packets sent. i'm trying to find the root of this problem.

so i assume, what if the NIC couldn't do UDP chekcsum calculation? the packets will be sent with UDP checksum error, and what would the Asterisk server do with packets of which UDP checksum is error?


Thank you.