TCP, IP, ICMP, and UDP counters are not available in the Performance Monitor utility by default. You must install and start the SNMP.EXE service. To install the service, choose the Network icon in Control Panel, Add Software button, select SNMP Service. When you exit the Network settings dialog box, it asks you to shut down the system. This is not necessary. To enable the counters, at the command line, bring up SNMP services by issuing the command net start snmp.

Performance Monitor Tips:

Architecture, performance-monitoring architecture in Windows NT 4.0
Controlling remote access to performance monitor
Perfmon.xla, Diagnose performance problems with perfmon.xla
TCP, IP, ICMP, and UDP counters - enable