128 Agilent FrameScope Pro User’s Man ual
5Network Performance Analyzer Reference
Network Database
•Every 300 secon ds:
•Send an ARP for each IP address in the subnet range
•For every ARP response received, send an ICMP echo
request
•Every 300 secon ds:
•Reset IP services
•Every 30 seconds (and whenever a new IP a ddress is
learned)
•Discover IP Services
a. Discover Domain Controller
b. Discover Domain Browsers
c. For each IP station in the station l ist which has not
been probed yet:
1) Query the DNS servers to get the hostname for the
IP address.
2) ARP the IP add ress
3) Start a TCP connect to the LPD port to check for
an IP printer server.
4) Use SNMP to r equest the system n ame
5) Use SNMP to r equest the subnet m ask
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 tha n one
IP address associated, one of which is marked as
remote
•Every 60 Seconds:
•Broadcast an IPX SAP Request