In this example of
show vdf-status command output, there are zero
"Fragments dropped" but a high number of
# show vdf-status Virtual DeFragmentation (VDF) statistics reported by np1: Fragment statistics Fragments received : 3768265 Fragments processed : 3768264 Fragments dropped : 0 Fragment queue limit : 0 Fragment overlap check : 0 Overlap protection on Head of Packet (HOP) : 0 Fragment pool depletion : 0 Packet pool depletion : 0 Invalid fragment : 0 Packet statistics Packets processed : 1642598 Packets dropped : 481574
The "Packets dropped" counter gets incremented when the VDF module processes an invalid fragment. After processing the invalid fragment, this counter is incremented, but the frame is still forwarded through the system. Think of this counter as an "Invalid packet" or "Invalid fragment" counter, because the packet is not dropped, it is forwarded.
An example of an invalid fragment would be receiving a fragmented IP packet with a fragment offset zero (1st fragment of packet) and then not receiving any further fragments.
The first fragment is forwarded through the system, but because no subsequent fragments of this packet are received, it is invalid, and XOS currently counts it as
Imported Document ID: 000027406
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