3-28
User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01
Chapter 3 Monitoring and Analysis
Response Time
Note NAM uses the TCP three-way handshake to calculate network delay. If there are no new TCP
connections during the polling interval, the NAM GUI displays a dash (-) for the delay value indicating
there is no delay data for that interval.
The Client-Server Application Transaction window displays when you click Analyze > Response Time
> Detailed Views > Client-Server Application Transactions. You can also view the TopN Chart to
view the most active network.
Client-Server Network Responses
The Client-Server Network Responses window shows information about network connectivity (also
known as network flight time) between servers and clients.
Tab l e 3-12 Client-Server Application Transactions Window
Field Description
Client Site Name of the client site.
Server Site Name of the server site.
Data Source Name of the data source.
VLAN VLAN
Server Name or IP address of the server
Client Host address of the client.
Application Application being used by server
Number of Transactions Total number of transactions observed during the monitoring interval
Average Transaction Time
(ms)
Average time (ms) elapsed from the start of a client request to the
completion of server response. Transaction times might vary significantly
depending upon application types. Relative thresholds are useful in this
situation.
Transaction time is a key indicator when detecting application performance
anomalies.
Average Server Response
Time (ms)
Amount of time it takes a server to send the initial response to a client
request as seen by the NAM.
Average Data Transmission
Time (ms)
Elapsed time from the first server-response packet to the last
server-response packet, excluding retransmission time.
Average Retransmission
Time (ms)
Average time to retransmit lost packets per transaction
Client ACK Round Trip Time
(ms)
Average network time for the client to acknowledge (ACK) a server data
packet as observed at NAM probing point