ICMP Source Quench
This value is the sum of all identified events in the ICMP Events display.
A router or gateway may discard Internet datagrams if it does not have the buffer space needed to queue the datagrams for output to the next network on the route to the destination network. If a router or gateway discards a datagram, it may send a source quench message to the Internet source host of the datagram. A destination host may also send a source quench message if datagrams arrive too fast to be processed.
The source quench message is a request to the host to cut back the rate at which it is sending traffic to the Internet destination. The router or gateway may send a source quench message for every message that it discards. On receipt of a source quench message, the source host should cut back the rate at which it is sending traffic to the specified destination until it no longer receives source quench messages from the router or gateway. The source host can then gradually increase the rate at which it sends traffic to the destination until it again receives source quench messages.
The router, gateway or host may send the source quench message when it approaches its capacity limit rather than waiting until the capacity is exceeded. This means that the data datagram which triggered the source quench message may be delivered.
Code 0 may be received from a gateway or a host.
Possible reasons for the event:
The router or gateway does not have enough buffer space to process the data stream.
The data stream is arriving to fast to the host.
The router, gateway or host is receiving a high number of badly formatted packets.