The reset msdp all-instance statistics command clears statistics of one or more source active (SA) peers without resetting the MSDP peer (s).
Usage Scenario
After the reset msdp all-instance statistics command is used, the statistics of the MSDP peer are cleared automatically. However, the TCP connections among peers are not closed, and MSDP services are not affected.
If you want to clear the statistics of an MSDP peer and to rebuild the TCP connections among MSDP peers at the same time, use the reset msdp peer command.