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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.
Table 3-9, Server Application Transactions Metrics, provides definitions of each field of the Server
Application Transactions window.
Server Network Responses
The Server Network Responses window shows the network connectivity and responsiveness between the
server and the switch. It is located at Analyze > Response Time > Detailed Views > Server Network
Responses.
Tab l e 3-9 Server Application Transactions Metrics
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
Application Application currently running
Number of Clients Total number of clients
Number of Transactions Total number of transactions
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 Transfer Time
(ms)
Average elapsed time from the first server-response packet to the last
server-response packet, excluding retransmission time. Data transfer
time is always measured in the server-to-client direction and can be
used to detect problems for a particular type of transaction of an
application.
Average Retransmission Time
(ms)
Average time to retransmit lost packets, per transaction.
Client ACK Round Trip Time
(ms)
Average round trip time for the client to acknowledge (ACK) a server
TCP packet.