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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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hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Jun 27, 2013

Yes, L4 connection mirroring will have much lower impact than using connection mirroring on a VS with an HTTP or other L7 profile. With L7 mirroring every packet and the full payload needs to be sent to the peer unit. Wth L4 it should be just the connection open and close packets.

 

 

sol13478: Overview of Connection and Persistence Mirroring (11.x)

 

http://support.f5.com/kb/en-us/solutions/public/13000/400/sol13478.html

 

 

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.

 

 

Yes, see the HS::status wiki page for details:

 

https://devcentral.f5.com/wiki/iRules.HA__status.ashx

 

 

Aaron