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128 Agilent FrameScope Pro User’s Manual
5 Network Performance Analyzer Reference
Network Database
• Every 300 seconds:
• Send an ARP for each IP address in the subnet range
• For every ARP response received, send an ICMP echo
request
• Every 300 seconds:
• Reset IP services
• Every 30 seconds (and whenever a new IP address is
learned)
• Discover IP Services
a. Discover Domain Controller
b. Discover Domain Browsers
c. For each IP station in the station list which has not
been probed yet:
1) Query the DNS servers to get the hostname for the
IP address.
2) ARP the IP address
3) Start a TCP connect to the LPD port to check for
an IP printer server.
4) Use SNMP to request the system name
5) Use SNMP to request the subnet mask
6) Start a TCP connect to the HTTP port to check for
a web server
d. For each MAC in the station list
1) Mark as router any MAC that has more than one
IP address associated, one of which is marked as
remote
• Every 60 Seconds:
• Broadcast an IPX SAP Request