SmartNA-X 1G/10G Modular | Introduction |
15
SmartNA-X
™
1G/10G User Guide 1.4
©
2015 Network Critical Solutions Limited
Figure 4: TAP configuration before a load balancer
TAP after a load balancer
You can place TAPs after a load balancer to monitor a group of servers with a single TAP. In this location, you'll be able
to observe which servers are responding to the requested information.
Note:
Care must be taken when scheduling the TAP deployment, since all the servers on the segment will be
taken offline while the TAP is connected and configured.
A limitation of placing TAPs after a load balancer would be understanding who is requesting the information. The Load
Balancer typically will appear as the user address making the requester of data appear as a single user. Another possibility
to address recognizing a users location depends on the type of load balancer you are using. For example, if your load
balancer supports it you can enable “x-forward-for” so that the user IP is included in the packet information. Other
possibilities include instrumenting requester information into a custom field embedded in the application. Both methods
are common when monitoring user traffic.
The following figure shows a configuration where a TAP is placed after a load balancer.