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student1_121897's avatar
student1_121897
Icon for Nimbostratus rankNimbostratus
Jun 27, 2013

What is the impact of activating Connection Mirroring?

Hello,   I would like to know what should I expect (in terms of CPU usage, memory usage, delay, etc) if I activate Connection Mirroring on a redundant pair of LTMs?   I don't have a test enviro...
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pete_71470's avatar
pete_71470
Icon for Cirrostratus rankCirrostratus
Jun 27, 2013
I understand the impact varies significantly depending upon specific configurations but when we activated connection mirroring for non-HTTP connections there was no observable impact on single-bladed Viprion. Peaking at about 1Gbps mirrored. From my readings this is unusual and impact should be expected. All that traffic glides over your HA link so that could be problematic if it isn't dedicated/direct-link.

 

 

Although not performance related, the iRule-fires-on-Standby issue still exists in 11.2.1 HF3. I see with 11.4 there is an iRule that allows awareness of Active/Standby so the rules can be told not to run on Standby.