Microsoft Exchange Common Network counters

The following table shows common network counters.

Counter Name	Description
Network Interface(*)\Bytes Total/sec
Network Interface(*)\Packets Outbound Errors	Indicates the number of outbound packets that couldn't be transmitted because of errors.
TCPv4\Connections Established	Shows the number of TCP connections for which the current state is either ESTABLISHED or CLOSE-WAIT. The number of TCP connections that can be established is constrained by the size of the nonpaged pool. When the nonpaged pool is depleted, no new connections can be established.
TCPv4\Connections Reset	Shows the number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state.
TCPv6\Connection Failures	Shows the number of TCP connections for which the current state is either ESTABLISHED or CLOSE-WAIT. The number of TCP connections that can be established is constrained by the size of the nonpaged pool. When the nonpaged pool is depleted, no new connections can be established.
TCPv6\Connections Reset	Shows the number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state.