The Frags and Loss Sources sensor looks for sources that cause packet loss by monitoring "Fragment reassembly time exceeded" messages. Packet fragmentation can be used to circumvent blocking rules on some firewalls.
Troubleshooting a Frags and Loss Sources Alert
Fragmentation and packet loss occurs when you deploy high bit-rate Windows Media content.
Fragmentation can cause retransmissions when some fragments fail to arrive in time so that the packet is lost. Reliable protocols such as TCP retransmit all of the fragments in order to recover from the loss of a single fragment.
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